1

ArevaEPRDCPEm Resource

From: WELLS Russell (AREVA) [Russell.Wells@areva.com]Sent: Thursday, February 24, 2011 5:53 PMTo: Tesfaye, GetachewCc: DELANO Karen (AREVA); ROMINE Judy (AREVA); BRYAN Martin (EXTERNAL AREVA);

GUCWA Len (EXTERNAL AREVA); HALLINGER Pat (EXTERNAL AREVA); BALLARD Bob (AREVA); RANSOM James (AREVA); BROWNSON Doug (AREVA)

Subject: DRAFT Response to U.S. EPR Design Certification Application RAI No. 434, FSAR Ch. 6, Questions 06.02.02-69, 06.02.02-71, 06.02.02-72, 06.02.02-73, 06.02.02-74, 06.02.02-76, 06.02.02-78, 06.02.02-79

Attachments: Draft RAI 434 Supplement 2 Response US EPR DC.pdf

Getachew, Attached is a draft response for RAI No. 434, FSAR Ch 6, Questions 06.02.02-69, 06.02.02-71, 06.02.02-72, 06.02.02-73, 06.02.02-74, 06.02.02-76, 06.02.02-78, 06.02.02-79 as shown below in advance of the final response dates shown below. Let me know if the staff has questions or if this can be sent as a final response. Thanks, Russ Wells U.S. EPR Design Certification Licensing Manager AREVA NP, Inc.  3315 Old Forest Road, P.O. Box 10935   Mail Stop OF‐57 Lynchburg, VA 24506‐0935  Phone: 434‐832‐3884 (work)              434‐942‐6375 (cell)   Fax: 434‐382‐3884 Russell.Wells@Areva.com

From: WELLS Russell (RS/NB) Sent: Thursday, February 24, 2011 5:11 PM To: 'Tesfaye, Getachew' Cc: DELANO Karen (RS/NB); BENNETT Kathy (RS/NB); ROMINE Judy (RS/NB); BRYAN Martin (External RS/NB); GUCWA Len (External RS/NB) Subject: Response to U.S. EPR Design Certification Application RAI No. 434, FSAR Ch. 6, Supplement 2 Getachew, AREVA NP Inc. (AREVA NP) provided a schedule for a technically correct and complete response to RAI 434 on November 15, 2010. AREVA NP submitted Supplement 1 to the response on January 26, 2011 to provide a revised response schedule. To provide an opportunity for additional interaction with the NRC staff, AREVA NP is providing a revised schedule for responding to Questions 06.02.02-70, 06.02.02-75 and 06.02.02-77. The schedule for the remaining questions is unchanged. The schedule for a technically correct and complete response to these questions is provided below. Question # Response Date

2

RAI 434 — 06.02.02-69 March 16, 2011 RAI 434 — 06.02.02-70 March 31, 2011 RAI 434 — 06.02.02-71 March 25, 2011 RAI 434 — 06.02.02-72 March 25, 2011 RAI 434 — 06.02.02-73 March 16, 2011 RAI 434 — 06.02.02-74 March 16, 2011 RAI 434 — 06.02.02-75 March 31, 2011 RAI 434 — 06.02.02-76 March 16, 2011 RAI 434 — 06.02.02-77 March 31, 2011 RAI 434 — 06.02.02-78 March 16, 2011 RAI 434 — 06.02.02-79 March 16, 2011 Sincerely, Russ Wells U.S. EPR Design Certification Licensing Manager AREVA NP, Inc.  3315 Old Forest Road, P.O. Box 10935   Mail Stop OF‐57 Lynchburg, VA 24506‐0935  Phone: 434‐832‐3884 (work)              434‐942‐6375 (cell)   Fax: 434‐382‐3884 Russell.Wells@Areva.com

From: BRYAN Martin (External RS/NB) Sent: Wednesday, January 26, 2011 12:16 PM To: 'Tesfaye, Getachew' Cc: DELANO Karen (RS/NB); ROMINE Judy (RS/NB); BENNETT Kathy (RS/NB); GUCWA Len (External RS/NB) Subject: Response to U.S. EPR Design Certification Application RAI No. 434, FSAR Ch. 6, Supplement 1

Getachew, AREVA NP Inc. provided a schedule for technically correct and complete responses to the 11 questions in RAI No. 434 on November 15, 2010. To allow additional time to finalize the responses and interact with the NRC, a revised schedule is provided. The schedule for providing a complete response to the remaining questions has been revised as indicated below. Question # Response Date RAI 434 — 06.02.02-69 March 16, 2011 RAI 434 — 06.02.02-70 March 16, 2011 RAI 434 — 06.02.02-71 March 25, 2011 RAI 434 — 06.02.02-72 March 25, 2011 RAI 434 — 06.02.02-73 March 16, 2011 RAI 434 — 06.02.02-74 March 16, 2011 RAI 434 — 06.02.02-75 March 16, 2011 RAI 434 — 06.02.02-76 March 16, 2011 RAI 434 — 06.02.02-77 March 25, 2011

3

RAI 434 — 06.02.02-78 March 16, 2011 RAI 434 — 06.02.02-79 March 16, 2011 Sincerely, Martin (Marty) C. Bryan U.S. EPR Design Certification Licensing Manager AREVA NP Inc. Tel: (434) 832-3016 702 561-3528 cell Martin.Bryan.ext@areva.com

From: BRYAN Martin (External RS/NB) Sent: Monday, November 15, 2010 4:58 PM To: 'Tesfaye, Getachew' Cc: DELANO Karen (RS/NB); ROMINE Judy (RS/NB); BENNETT Kathy (RS/NB); GUCWA Len (External RS/NB); 'Miernicki, Michael' Subject: Response to U.S. EPR Design Certification Application RAI No. 434, FSAR Ch. 6

Getachew, Attached please find AREVA NP Inc.’s response to the subject request for additional information (RAI). The attached file, “RAI 434 Response US EPR DC.pdf,” provides a schedule since a technically correct and complete response to the 11 questions is not provided. The following table indicates the respective pages in the response document, “RAI 434 Response US EPR DC.pdf,” that contain AREVA NP’s response to the subject questions.

Question # Start Page End Page RAI 434 — 06.02.02-69 2 2 RAI 434 — 06.02.02-70 3 3 RAI 434 — 06.02.02-71 4 5 RAI 434 — 06.02.02-72 6 6 RAI 434 — 06.02.02-73 7 7 RAI 434 — 06.02.02-74 8 8 RAI 434 — 06.02.02-75 9 9 RAI 434 — 06.02.02-76 10 10 RAI 434 — 06.02.02-77 11 11 RAI 434 — 06.02.02-78 12 12 RAI 434 — 06.02.02-79 13 13 A complete answer is not provided for 11 of the 11 questions. The schedule for a technically correct and complete response to these questions is provided below. Question # Response DateRAI 434 — 06.02.02-69 January 26, 2011 RAI 434 — 06.02.02-70 January 26, 2011 RAI 434 — 06.02.02-71 January 26, 2011 RAI 434 — 06.02.02-72 January 26, 2011

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RAI 434 — 06.02.02-73 January 26, 2011 RAI 434 — 06.02.02-74 January 26, 2011 RAI 434 — 06.02.02-75 January 26, 2011 RAI 434 — 06.02.02-76 January 26, 2011 RAI 434 — 06.02.02-77 January 26, 2011 RAI 434 — 06.02.02-78 January 26, 2011 RAI 434 — 06.02.02-79 January 26, 2011 Sincerely, Martin (Marty) C. Bryan U.S. EPR Design Certification Licensing Manager AREVA NP Inc. Tel: (434) 832-3016 702 561-3528 cell Martin.Bryan.ext@areva.com

From: Tesfaye, Getachew [mailto:Getachew.Tesfaye@nrc.gov] Sent: Friday, October 15, 2010 11:11 AM To: ZZ-DL-A-USEPR-DL Cc: Ashley, Clinton; Jackson, Christopher; McKirgan, John; Carneal, Jason; Colaccino, Joseph; ArevaEPRDCPEm ResourceSubject: U.S. EPR Design Certification Application RAI No. 434 (4897), FSAR Ch. 6

Attached please find the subject requests for additional information (RAI). A draft of the RAI was provided to you on August 6, 2010, and discussed with your staff on September 24, 2010. No changes were made to the draft RAI as a result of that discussion. The schedule we have established for review of your application assumes technically correct and complete responses within 30 days of receipt of RAIs. For any RAIs that cannot be answered within 30 days, it is expected that a date for receipt of this information will be provided to the staff within the 30 day period so that the staff can assess how this information will impact the published schedule.

Thanks, Getachew Tesfaye Sr. Project Manager NRO/DNRL/NARP (301) 415-3361

Hearing Identifier: AREVA_EPR_DC_RAIs Email Number: 2588 Mail Envelope Properties (1F1CC1BBDC66B842A46CAC03D6B1CD4104049A9C) Subject: DRAFT Response to U.S. EPR Design Certification Application RAI No. 434, FSAR Ch. 6, Questions 06.02.02-69, 06.02.02-71, 06.02.02-72, 06.02.02-73, 06.02.02-74, 06.02.02-76, 06.02.02-78, 06.02.02-79 Sent Date: 2/24/2011 5:53:13 PM Received Date: 2/24/2011 5:53:17 PM From: WELLS Russell (AREVA) Created By: Russell.Wells@areva.com Recipients: "DELANO Karen (AREVA)" <Karen.Delano@areva.com> Tracking Status: None "ROMINE Judy (AREVA)" <Judy.Romine@areva.com> Tracking Status: None "BRYAN Martin (EXTERNAL AREVA)" <Martin.Bryan.ext@areva.com> Tracking Status: None "GUCWA Len (EXTERNAL AREVA)" <Len.Gucwa.ext@areva.com> Tracking Status: None "HALLINGER Pat (EXTERNAL AREVA)" <Pat.Hallinger.ext@areva.com> Tracking Status: None "BALLARD Bob (AREVA)" <Robert.Ballard@areva.com> Tracking Status: None "RANSOM James (AREVA)" <James.Ransom@areva.com> Tracking Status: None "BROWNSON Doug (AREVA)" <Douglas.Brownson@areva.com> Tracking Status: None "Tesfaye, Getachew" <Getachew.Tesfaye@nrc.gov> Tracking Status: None Post Office: AUSLYNCMX02.adom.ad.corp Files Size Date & Time MESSAGE 7388 2/24/2011 5:53:17 PM Draft RAI 434 Supplement 2 Response US EPR DC.pdf 438702 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received:

Response to

Request for Additional Information No. 434(4897), Supplement 2, Revision 0

10/15/2010

U.S. EPR Standard Design Certification AREVA NP Inc.

Docket No. 52-020 SRP Section: 06.02.02 - Containment Heat Removal Systems

Application Section: 6.3

QUESTIONS for Containment and Ventilation Branch 1 (AP1000/EPR Projects) (SPCV)

DRAFT

nch 1 (APnch

AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 2 of 40

Question 06.02.02-69:

Follow-Up to RAI 310, Question 06.03-14 and RAI 363, Question 06.02.02-43:

US EPR FSAR Tier 2, Section 6.3.3.3 “NPSH Evaluation” states the SIS pump NPSH evaluation for LBLOCA events is performed using the maximum pump flow head-capacity curves. The response to RAI 310, Question 06.03-14, indicates the design basis maximum flow through one sump is 3447 gpm (MHSI and LHSI combined flow). In the response to RAI 363, Question 06.02.02-43, the flow through the sump used for strainer qualification is 3284 gpm. It appears that strainer qualification flow does not bound the design basis maximum flow. Therefore, provide a detailed discussion of AREVA's approach to selecting the plant ECCS flow rate used for strainer qualification and justify the described approach.

Response to Question 06.02.02-69:

The U.S. EPR safety injection system (SIS) design basis maximum flow rate of 3447 gpm (combined medium head safety injection (MHSI) and low head safety injection (LHSI) flow through one sump) is based on the following conservative assumptions:

• Increased pump performance.

• Reduced pipe friction (i.e., decreased pressure drops).

• No debris loss across strainers.

The strainer qualification test procedure was revised to reflect the higher flow rate of 3447 gpm.

FSAR Impact:

The U.S. EPR FSAR will not be changed as a result of this question.

DRAFTmaximum flow ramaximum

w head safety injectiow head safety vative assumptions: vative assumptions:

essure drops). rops).

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not be changed as a ree changed as a re

AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 3 of 40

Question 06.02.02-71:

Follow-up to RAI 363, Question 06.02.02-43 item 11:

Analysis of the most challenging postulated accident with regard to sump performance during long-term core cooling involves selection of the most limiting pipe break size, location, and debris combination within containment. RG 1.82 position C.1.3.2.3 states that a sufficient number of breaks in each high pressure system that relies on recirculation should be considered. The NEI 04-07 GR states that the objective of the break selection process is to identify the break size and location which results in debris generation that produces the maximum head loss across the sump screen.

For the US EPR, ANP-10293 indicates there are two main paths for debris to enter the IRWST and potentially transport to the sump strainer. The two main paths for debris to enter the IRWST are from the heavy floor and the annular floor. The flow from these floors is filtered by debris interceptors called retaining baskets. Flow from the heavy floor to the IRWST is filtered by a large basket. Flow from the annular floor to the IRWST is filtered by a small basket.

The retaining basket performance is critical for analyzing and measuring strainer performance because the basket is designed to capture debris and keep it from reaching the strainer. However, the basket can overflow and as a result, debris can bypass the retaining basket and transport to the strainer. Therefore, in order to assess what causes the maximum head loss across the sump screen, a complete understanding of basket performance is necessary. Since the maximum head loss for US EPR is determined by testing, it is important to evaluate the performance of each debris flow path to the IRWST and their associated debris interceptors (retaining baskets).

AREVA's analysis and testing approach to date has focused on the large retaining basket. In RAI 363, Question 06.02.02-43 item 11, AREVA was asked how the small compartment retaining basket was bounded by testing for the large compartment retaining basket. In a June 17, 2010, phone call discussing this question and AREVAs response, AREVA indicated that the small compartment retaining basket no longer receives water from the annular floor due to a design change that redirected pressurizer room break flow from the annular floor to the heavy floor. It was also mentioned that the annular floor will only receive water from condensation and it will not fill up and spill into the small compartment basket located in the IRWST. Because this information is not be docketed and has not been fully explained , the staff requests AREVA to document the assessment of whether pipe breaks (consistent with RG 1.82 and NEI 04-07 guidance) can deliver water and/or debris to the annular floor. Provide a listing of potential systems that were considered and why they can or cannot deliver water to the annular region. If they can, then assess the impact on small basket performance and strainer head loss (debris generation, debris transport, and debris accumulation). As part of the discussion clearly define the purpose of the small retaining basket and document this discussion in ANP-10293.

In addition, the staff request that AREVA provide a complete assessment of the annular floor region and its water hold-up capacity in response to a design basis accident that requires recirculation. Include in the discussion the annular region water sources (pipe break, condensation), how high the water level can rise in the annular region, what limits the height of the water level in the annular region, identify any compartment(s) into which the water from the annular region spills, and describe any components (dampers, valves) that need to actuate/function/operate in order to allow the annular region to spill into another compartment

DRAFT

ths forths f these floor thes

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AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 4 of 40

(e.g. IRWST). If condensation is the sole source of water collecting in the annular region, describe the method and approach used to assess the amount of condensate that could collect in the annular region.

Response to Question 06.02.02-71:

For a large break loss of coolant accident (LBLOCA), the annular space will receive water from condensation that spills into the small compartment of the double compartment retaining basket and into the single compartment retaining basket. The U.S. EPR design has two double compartment retaining baskets and two single compartment retaining baskets located in the IRWST. The small compartment is no longer used for fibrous material collection, except from latent debris.

Water entering the annular region will spill into the IRWST via seven openings. The openings are not controlled by any components and will begin spilling water into the IRWST when the level in the annular region rises above the four inch high weirs of the openings. The height of retained water in the annular region will be four inches plus a dynamic head height, which will vary depending on the flow of condensation into the annular region. Another factor which increases the dynamic head height is the width of the weir; a smaller width yields a larger dynamic head height. The total width of the openings is approximately 25 ft 7in; however, in the water retention analysis a conservative value of 20 ft is used.

In the long term, the primary water source in the annular region is condensation. However, during the blowdown phase of the LBLOCA there may be sufficient pressure difference between the equipment space and the service space to force water from the IRWST to the annular area. The exact amount of water displaced from the IRWST is dependent on a number of interrelated factors for each break scenario. Therefore, a bounding scenario that would allow the annular area to be filled up to the weir height by liquid from the IRWST in the first 18 seconds is applied.

The amount of condensation spilling into the annular region is determined by calculating a ratio of the surface areas for all compartments that spill condensate into the annular region and comparing the total internal surface area of the Reactor Building. This ratio is then applied to the total condensation rate of the Reactor Building. The total condensation rate is determined by using the total amount of energy absorbed by all of the heat structures in the GOTHIC multi-node model and the latent heat of vaporization at containment pressure saturated conditions. This method conservatively assumes that all energy absorbed by a heat structure relates to the condensing of steam and that the condensation rate is proportionally distributed in the Reactor Building based on the amount of surface area. A list of rooms that are assumed to spill condensate into the annular region is provided in Table 06.02.02-71-1.

FSAR Impact:

The U.S. EPR FSAR will not be changed as a result of this question.

DRAFT

seven sevenwater into twate

weirs of the openweirs of theplus a dynamic head plus a dynamic

annular region. Anotherannular region. Anotthe weir; a smaller widtthe weir; a smaller widt

enings is approximately ngs is approe of 20 ft is used. t is use

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heat heat

AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 5 of 40

Table 06.02.02-71-1—Rooms that Drain Condensate into Annular Region

Room Description Surface Area

(ft²) % of Total

SA UJA07013 Access Area 4214.29 1.00

UJA07014 Area for JND, JNG & JMQ (MHSI, LHSI, SAHRS) Pipe Penetrations 6858.78 1.62

UJA07015 Area for JND, JNG & JMQ (MHSI, LHSI, SAHRS) Pipe Penetrations 6986.92 1.65

UJA07016 Area for Hot Pipe Penetrations from UFA 7520.54 1.78 UJA07018 LCQ (SGBS) HX Room 3648.70 0.86 UJA11013 Loop 1 Annular Area 180-270 Deg 5601.81 1.33 UJA11014 Loop 2 Annular Area 270-0 Deg 3928.62 0.93 UJA11015 Loop 3 Annular Area 0-90 Deg 4287.86 1.02 UJA11016 Loop 4 Annular Area 90-180 Deg 5702.91 1.35 UJA11020 Access to Personnel Airlock 3778.52 0.89 UJA11021 FAL (FPPS) Valve Room 839.27 0.2 UJA11025 JND & JNG (MHSI & LHSI) Valve 1 Room 1210.21 0.29 UJA11026 JND & JNG (MHSI & LHSI) Valve 2 Room 1060.47 0.25 UJA11027 JND & JNG (MHSI & LHSI) Valve 3 Room 1060.47 0.25 UJA11028 JND & JNG (MHSI & LHSI) Valve 4 Room 1210.21 0.29 UJA11031 Access to Loop 1 & 2 Area 654.45 0.15 UJA11032 Access to Loop 3 & 4 Area 654.45 0.15 UJA15013 JNG13 (LHSI) Tank & Loop 1 Annular Area 3782.21 0.9 UJA15014 JNG23 (LHSI) Tank & Loop 2 Annular Area 4482.89 1.06 UJA15015 JNG33 (LHSI) Tank & Loop 3 Annular Area 4759.5 1.13 UJA15016 JNG43 (LHSI) Tank & Loop 4 Annular Area 4420.76 1.05 UJA15020 Access to Transfer Tube Compartment 1232.47 0.29 UJA15021 Transfer Tube Compartment 1087.95 0.26 UJA15023 Instrumentation Lances Storage Room 654.73 0.15 UJA15025 FAL (FPPS) Room 881.07 0.21 UJA18013 JNG13 (LHSI) Tank & Loop 1 Annular Area 3762.42 0.89 UJA18014 JNG23 (LHSI) Tank & Loop 2 Annular Area 4493.34 1.06 UJA18015 JNG33 (LHSI) Tank & Loop 3 Annular Area 4202.81 0.99 UJA18016 JNG43 (LHSI) Tank & Loop 4 Annular Area 3829.62 0.91 UJA23013 JNG13 (LHSI) Tank & Loop 1 Annular Area 5286.01 1.25 UJA23014 JNG23 (LHSI) Tank & Loop 2 Annular Area 5670.3 1.34 UJA23015 JNG33 (LHSI) Tank & Loop 3 Annular Area 5495.17 1.3 UJA23016 JNG43 (LHSI) Tank & Loop 4 Annular Area 5461.96 1.29 UJA23042 Instrumentation Measuring Cabinets Room 1786.31 0.42 UJA29013 Setdown Area, Operating floor 8444.62 2 UJA29014 Annular Area, 240-0 Deg 7751.37 1.83 UJA29015 Annular Area, 0-120 Deg 5728.13 1.36 UJA29016 Access to Equipment Hatch 6205.06 1.47 UJA29018 Access to Operating Floor 2476.75 0.59

UJA29022 KLA51/52 Compressor & KLA50 Filter (CBVS) Room 2822.09 0.67

UJA29023 Access to Emergency Airlock 2618.05 0.62

DHSI) Tank HSI) Tank DRAFTTT

5

TTTT377TTTT839.2TTTFToom oom 121012

FTFTFTFT2 Room Roo 11FTFTFTFTe 3 Room Room FTFTFTFTalve 4 Room alve 4 Room

AFFFFAFea AF& Loop 1 Annular Area Loop 1 Annular Area

RAk & Loop 2 Annular Arek & Loop 2 Annu

RAank & Loop 3 Annular Aank & Loop 3 AnnulaRA) Tank & Loop 4 AnnulaTank & Loop 4 AnnulaRATransfer Tube Comparter Tube CompartRr Tube Compartment r Tube Compartm

DRumentation Lances Storaumentation Lances StoDR(FPPS) Room (FPPS) Room DR(LHSI) Tank & L(LHSI) Tank &DDI) TaI) TaDD

AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 6 of 40

UJA34014 Annular Area, 240-0 Deg 6170.05 1.46 UJA34015 Annular Area, 0-120 Deg 8078.52 1.91 UJA34018 RPV Closure Head Storage Area 2136.58 0.51 UJA34022 JEG (RPS) Valve Room 1418.31 0.34 UJA40001 Dome 41306.5 9.78

Total 215664.01 51.05

Note: “Percent of total surface area (SA)” considers the total surface area for those structures inside reactor containment.

DRAFT

AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 7 of 40

Question 06.02.02-72:

Follow-up to RAI 111, Question 06.02.02-8, and RAI 233, Question 06.02.02-29 Regarding Upstream Effects and water hold-up:

Upstream effects and water holdup is an important aspect of Generic Safety Issue (GSI) 191 and NEI 04-07, especially where curbs or weirs or flooding berms are used to hold up debris and water. In RAI 111, Question 06.02.02-8 responses, AREVA provides a discussion of the US EPR upstream effects and provides water hold-up information in the Supplement 4 response to RAI 233, Question 06.02.02-29. This information is an important design detail to support resolution of GSI-191 upstream effects and water hold-up. However, minimal upstream effects and water hold information is provided in the FSAR. In addition, ANP 10293 Rev 1, “US EPR Design Features to Address GSI-191”, assesses the US EPR design with respect to NEI 04-07 and RG 1.82 but provides a limited discussion on upstream effects and water holdup. The staff requests that AREVA document their upstream effects and water hold-up evaluation in ANP-10293 or the FSAR and include a summary of design information such as a table listing hold-up volumes and their location (floors, steam, condensate, trapped in compartments etc.).

Response to Question 06.02.02-72:

The mass of water holdup in the Reactor Building is examined during various phases of the transient: blowdown, refill/reflood, post reflood, peak containment pressure, peak IRWST temperature, and half peak containment pressure. There are several different categories analyzed for water holdup: condensate on walls and ceilings, water retained in steam and droplet phase within the containment atmosphere, and water retained on floors.

The tables below are based on condensation being the only source of water in the annular area. During blowdown there may be sufficient pressure difference between the equipment space and the service space to force water from the IRWST into the annular area. The exact amount of IRWST water that could be displaced is dependent on a number of interrelated factors for each break scenario. Therefore in the water retention analysis a worst case evaluation was made assuming that the annular area would instantly fill to the height of the weir with IRWST liquid. The total retained mass values only changed during the first three analyzed times as the annular area is already filled to the weirs in the remaining times. The results showed that the water hold up was still within the margin of allowable IRWST inventory for NPSH. The most limiting case in terms of NPSH was still at one hour.

Table 06.02.02-72-1 lists the wall condensation film thickness during each phase. The mass of condensation on walls in each compartment is listed in Table 06.02.02-72-2.

Table 06.02.02-72-3 lists the volume of condensation drops on ceilings per square foot. The mass of condensation on the ceiling of each compartment during each phase is listed in Table 06.02.02-72-4.

Table 06.02.02-72-5 lists the mass of water retained during the steam and droplet phase in the containment atmosphere. Table 06.02.02-72-6 lists the depths of flooding level within the lower annular region during the different phases. Table 06.02.02-72-7 lists the depths of flooding level on the heavy floor at the different phases. Table 06.02.02-72-8 lists the flooding depths of the compartments which will

DRAFT

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AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 8 of 40

flood due to curbs/doors. Table 06.02.02-72-9 lists the mass of water retained on floors in the annular region, heavy floor, and behind doors/curbs in other compartments.

The mass of retained water re-injected into the reactor coolant system (RCS) is calculated using the maximum flow of safety injection pumps in the beginning of the transient. After the end of reflood, the mass of retained water re-injected into the RCS is calculated based on the RCS volumes. The values of the mass of retained water re-injected into the RCS for each phase are listed in Table 06.02.02-79-10.

In the water retention analysis, it is assumed that one of the double compartment retaining baskets becomes clogged and is completely filled with water. Based on the volume of the retention compartments above the IRWST level, the retained mass for the clogged basket is 68,064 lbm. This mass is conservatively applied during each phase.

Table 06.02.02-79-10 lists the total mass of retained water in the Reactor Building for each analysis during a transient.

A summary of the water holdup evaluation will be provided in Revision 3 of Technical Report ANP-10293, “U.S. EPR™ Design Features to Address GSI-191,” which is scheduled to be submitted by March 31, 2011.

FSAR Impact:

The U.S. EPR FSAR will not be changed as a result of this question.

DRAFT

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uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

9 of

40

Tabl

e 06

.02.

02-7

2-1—

Film

Thi

ckne

ss o

f Wal

l Con

dens

ate

Para

met

er

Dur

ing

Blo

wdo

wn

Dur

ing

Ref

ill/R

eflo

od

Dur

ing

Post

R

eflo

od

Tim

e of

Pea

k C

ont.

Pres

sure

Tim

e of

Pea

k IR

WST

Tem

p Ti

me

of H

alf

Peak

Pr

essu

re

Tim

e (s

) 29

.18

60.0

9 60

0.10

36

00.1

1 12

304.

73

4012

2.71

C

onta

inm

ent P

ress

ure

(psi

a)

66.3

7 63

.44

65

.15

69.2

7 61

.63

41

.97

Li

quid

Con

duct

ivity

(B

tu/°F

·ft·h

) 0.

397

0.

398

0.39

7

0.39

7

0.39

8

0.39

8

Liqu

id V

isco

sity

(lbm

/ft·h

) 0.

443

0.44

7

0.44

5

0.43

9

0.45

2

0.50

4

Liqu

id D

ensi

ty (l

bm/ft

³) 57

.33

57.4

2 57

.37

57

.24

57.4

9

58.2

4

Vapo

r Den

sity

(lbm

/ft³)

0.15

32

0.14

68

0.15

05

0.15

95

0.14

29

0.09

96

Late

nt H

eat o

f Vap

oriz

atio

n (B

tu/lb

m)

910.

60

912.

69

911.

48

908.

52

914.

19

932.

9

Tsat

– T

s (°F

) 19

5.38

18

0.97

52

.93

17

.41

11

.39

9.64

H

eigh

t, L

(ft)

134.

2

134.

2 13

4.2

13

4.2

13

4.2

13

4.2

A

vera

ge F

ilm T

hick

ness

(ft)

0.00

157

0.

0015

4 0.

0011

3

0.00

086

0.00

077

0.00

075

DRAF

T6 TT0.39 TTTFT

445

0.

439

44

5

0.4 FTFTFTFT

57.3

7

57.2

457

.37

57

.2 FTFTFTFT0.

1505

0.

10.

1505

FTFTFTFT91

1.48

91

1.48

AFTFTFT AFT

7

52.9

3

52.9

3 AAAFFFAF

4.2

134.

2

134.

2 ARAAA

FRA

0.00

154

0.00

113

0.00

154

0.00

113

RARARARARARARA

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

10 o

f 40

Tabl

e 06

.02.

02-7

2-2—

Mas

s of

Con

dens

atio

n on

Wal

ls

Roo

m

Des

crip

tion

Are

a of

W

alls

(ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

UJA

0400

2Sp

read

ing

Area

23

90.9

215.

1521

1.71

155.

4111

7.27

106.

3510

4.95

UJA

0400

3IR

WST

53

.84.

844.

763.

502.

642.

392.

36U

JA04

004

KT (N

I DVS

) Sum

p R

oom

56

1.9

50.5

649

.76

36.5

227

.56

24.9

924

.67

UJA

0400

5Fl

oodi

ng D

evic

e C

ompa

rtmen

t 19

07.6

171.

6616

8.92

124.

0093

.56

84.8

583

.74

UJA

0400

6Fl

oodi

ng D

evic

e C

ompa

rtmen

t 19

07.6

171.

6616

8.92

124.

0093

.56

84.8

583

.74

UJA

0401

2El

evat

or

533.

948

.04

47.2

834

.70

26.1

923

.75

23.4

4U

JA04

013

Acce

ss A

rea

418.

837

.69

37.0

827

.22

20.5

418

.63

18.3

8U

JA07

001

Rea

ctor

Cav

ity

1709

.515

3.83

151.

3811

1.12

83.8

576

.04

75.0

4U

JA07

003

IRW

ST A

rea

2709

.524

3.82

239.

9317

6.12

132.

8912

0.52

118.

94U

JA07

004

KT (N

I DVS

) Sum

p R

oom

59

2.1

53.2

852

.43

38.4

929

.04

26.3

425

.99

UJA

0701

2El

evat

or

437.

139

.33

38.7

128

.41

21.4

419

.44

19.1

9U

JA07

013

Acce

ss A

rea

1986

.117

8.72

175.

8712

9.10

97.4

188

.34

87.1

8U

JA07

014

Pipe

Pen

etra

tions

27

51.5

247.

6024

3.64

178.

8513

4.95

122.

3912

0.78

UJA

0701

5Pi

pe P

enet

ratio

ns

2807

.525

2.64

248.

6018

2.49

137.

7012

4.88

123.

24U

JA07

016

Pipe

Pen

etra

tions

33

40.4

300.

5929

5.79

217.

1316

3.84

148.

5814

6.63

UJA

0701

7Ve

ntin

g Ar

ea fo

r Spr

eadi

ng

Com

partm

ent

547.

949

.30

48.5

235

.61

26.8

724

.37

24.0

5U

JA07

018

LCQ

(SG

BS) H

X R

oom

15

32.9

137.

9413

5.74

99.6

475

.19

68.1

867

.29

UJA

0702

0KT

(NI D

VS) F

loor

Dra

in a

nd T

ank

Roo

m

784.

870

.62

69.4

951

.01

38.4

934

.91

34.4

5U

JA07

021

KTA1

0 (N

I DVS

) HX

Roo

m

574.

851

.72

50.9

037

.36

28.1

925

.57

25.2

3U

JA07

022

KTA1

0 (N

I DVS

) Pum

ps R

oom

90

0.0

80.9

979

.69

58.5

044

.14

40.0

339

.51

UJA

0702

3KT

A10

(NI D

VS) F

loor

Dra

in a

nd

Tank

Roo

m

803.

172

.27

71.1

152

.20

39.3

935

.72

35.2

5U

JA07

024

KT (R

CD

T) T

ank

Roo

m

771.

869

.45

68.3

450

.17

37.8

534

.33

33.8

8U

JA07

026

KBA1

2 (C

VCS)

HX

Roo

m

713.

764

.22

63.2

046

.39

35.0

131

.75

31.3

3U

JA07

027

KBA1

1 (C

VCS)

HX

Roo

m

734.

266

.07

65.0

147

.72

36.0

132

.66

32.2

3U

JA07

028

KBA

(CVC

S) V

alve

Roo

m

740.

666

.64

65.5

848

.14

36.3

232

.94

32.5

1U

JA07

029

KBA

(CVC

S) V

alve

Roo

m

582.

452

.41

51.5

737

.86

28.5

725

.91

25.5

6U

JA11

001

JAA1

0 (R

PV) R

oom

10

95.9

98.6

297

.04

71.2

453

.75

48.7

548

.11

DRAF

T.7.7 4.76

4.7

T49

.76

49.

T16

8.92

68.9

212 T

666616

8.9292

124

FT8.

048.

0447

.28

3

FT37

.69

37.

37.0

8 FT15

3.83

53.8

315

1.38

AFT

5524

3.82.82

239.

9

AAF2.

1.153

.288

52 AAF43

7.11

39.3

339

.33

RAAF

1986

.117

8.72

178.

72

RAA2751

.527

524

7.60

2 RRA2807.5807252.

2 RRA3340.43340.4303 RRA547.

9

DRR1532.

153 DR

and

Tank

an

d

DRD

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

11 o

f 40

Roo

m

Des

crip

tion

Are

a of

W

alls

(ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

UJA

1100

2JE

B10

(RC

P) O

il C

olle

ctio

n Ta

nk

Area

93

2.2

83.8

982

.55

60.5

945

.72

41.4

740

.92

UJA

1100

3JE

A10

(SG

) Sup

ports

Are

a 50

4.9

45.4

344

.71

32.8

224

.76

22.4

622

.16

UJA

1100

4JE

A20

(SG

) Sup

ports

Are

a 50

4.9

45.4

344

.71

32.8

224

.76

22.4

622

.16

UJA

1100

5JE

B20

(RC

P) O

il C

olle

ctio

n Ta

nk

Area

93

6.6

84.2

882

.94

60.8

845

.94

41.6

641

.11

UJA

1100

6JE

B30

(RC

P) O

il C

olle

ctio

n Ta

nk

Area

93

6.6

84.2

882

.94

60.8

845

.94

41.6

641

.11

UJA

1100

7JE

A30

(SG

) Sup

ports

Are

a 50

4.9

45.4

344

.71

32.8

224

.76

22.4

622

.16

UJA

1100

8JE

A40

(SG

) Sup

ports

Are

a 50

4.9

45.4

344

.71

32.8

224

.76

22.4

622

.16

UJA

1100

9JE

B40

(RC

P) O

il C

olle

ctio

n Ta

nk

Area

93

2.2

83.8

982

.55

60.5

945

.72

41.4

740

.92

UJA

1101

0So

uth

Stai

rcas

e 57

4.8

51.7

250

.90

37.3

628

.19

25.5

725

.23

UJA

1101

2El

evat

or

419.

837

.78

37.1

727

.29

20.5

918

.67

18.4

3U

JA11

013

Loop

1 A

nnul

ar A

rea

180-

270

Deg

24

88.9

223.

9722

0.39

161.

7812

2.07

110.

7110

9.25

UJA

1101

4Lo

op 2

Ann

ular

Are

a 27

0-0

Deg

18

20.4

163.

8116

1.20

118.

3389

.29

80.9

779

.91

UJA

1101

5Lo

op 3

Ann

ular

Are

a 0-

90 D

eg

1906

.517

1.56

168.

8212

3.93

93.5

184

.80

83.6

9U

JA11

016

Loop

4 A

nnul

ar A

rea

90-1

80 D

eg

2505

.022

5.42

221.

8216

2.83

122.

8611

1.43

109.

96

UJA

1101

7Ve

ntin

g Ar

ea fo

r Spr

eadi

ng

Com

partm

ent

724.

565

.20

64.1

547

.09

35.5

332

.23

31.8

0U

JA11

018

LCQ

50 (S

GBS

) Tan

k R

oom

21

46.5

193.

1619

0.07

139.

5310

5.28

95.4

894

.22

UJA

1101

9JE

G (P

RT)

Tan

k R

oom

15

37.2

138.

3313

6.12

99.9

275

.40

68.3

867

.48

UJA

1102

0Ac

cess

to P

erso

nnel

Airl

ock

1711

.615

4.02

151.

5611

1.26

83.9

576

.13

75.1

3U

JA11

021

FAL

(FPP

S) V

alve

Roo

m

591.

053

.18

52.3

338

.42

28.9

926

.29

25.9

4U

JA11

022

KBA

(CVC

S) V

alve

Roo

m

856.

977

.11

75.8

855

.70

42.0

338

.12

37.6

1U

JA11

023

KBA

(CVC

S) V

alve

Roo

m

1398

.412

5.84

123.

8390

.90

68.5

962

.20

61.3

8U

JA11

024

KBA1

0 (C

VCS)

HX

Roo

m

812.

873

.14

71.9

752

.83

39.8

736

.15

35.6

8

UJA

1102

5JN

D &

JN

G (M

HSI

& L

HSI

) Val

ve 1

R

oom

81

8.1

73.6

272

.44

53.1

840

.13

36.3

935

.91

UJA

1102

6JN

D &

JN

G (M

HSI

& L

HSI

) Val

ve 2

R

oom

74

7.1

67.2

366

.16

48.5

636

.64

33.2

332

.79

UJA

1102

7JN

D &

JN

G (M

HSI

& L

HSI

) Val

ve 3

74

7.1

67.2

366

.16

48.5

636

.64

33.2

332

.79

DRAF

T.7.7

44.7

144

.7

T82

.94

82.9

46

FT4.

284.

2882

.94

6

FT45

.43

4544

.71 FT

45.4

345

.43

44.7

1

AFT

2.2.2

83.8

983

.89

82 AAF57

4.88

51.7

251

.72

RAAF

419.

837

.78

37.7

8

RAA2488

.924

8822

3.97

2 RRA1820.41820163.

1 RRA1906.51906.5171 RRAeg

25

05.0

2505

.0

DRR724.

72 DRRoo

m

oom

21

414 DRDD

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

12 o

f 40

Roo

m

Des

crip

tion

Are

a of

W

alls

(ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

Roo

m

UJA

1102

8JN

D &

JN

G (M

HSI

& L

HSI

) Val

ve 4

R

oom

81

8.1

73.6

272

.44

53.1

840

.13

36.3

935

.91

UJA

1103

1Ac

cess

to L

oop

1 &

2 Ar

ea

478.

043

.01

42.3

331

.07

23.4

421

.26

20.9

8U

JA11

032

Acce

ss to

Loo

p 3

& 4

Area

47

8.0

43.0

142

.33

31.0

723

.44

21.2

620

.98

UJA

1500

1R

eact

or C

avity

14

46.8

130.

1912

8.11

94.0

470

.96

64.3

663

.51

UJA

1500

2JE

B10

Pum

p (R

CP)

Roo

m

1242

.311

1.79

110.

0180

.75

60.9

355

.26

54.5

3U

JA15

003

JEA1

0 (S

G) S

uppo

rt Ar

ea

1382

.212

4.38

122.

3989

.84

67.7

961

.48

60.6

7U

JA15

004

JEA2

0 (S

G) S

uppo

rt Ar

ea

1409

.112

6.80

124.

7891

.59

69.1

162

.68

61.8

5U

JA15

005

JEB2

0 Pu

mp

(RC

P) R

oom

13

03.6

117.

3111

5.43

84.7

463

.94

57.9

957

.22

UJA

1500

6JE

B30

Pum

p (R

CP)

Roo

m

1303

.611

7.31

115.

4384

.74

63.9

457

.99

57.2

2U

JA15

007

JEA3

0 (S

G) S

uppo

rt Ar

ea

1409

.112

6.80

124.

7891

.59

69.1

162

.68

61.8

5U

JA15

008

JEA4

0 (S

G) S

uppo

rt Ar

ea

1382

.212

4.38

122.

3989

.84

67.7

961

.48

60.6

7U

JA15

009

JEB4

0 Pu

mp

(RC

P) R

oom

12

42.3

111.

7911

0.01

80.7

560

.93

55.2

654

.53

UJA

1501

0So

uth

Stai

rcas

e 64

7.0

58.2

257

.29

42.0

631

.73

28.7

828

.40

UJA

1501

1N

orth

Sta

ircas

e 80

6.3

72.5

671

.40

52.4

139

.55

35.8

735

.39

UJA

1501

2El

evat

or

313.

328

.19

27.7

420

.36

15.3

713

.94

13.7

5

UJA

1501

3JN

G13

(LH

SI) T

ank

& Lo

op 1

Ann

ular

Ar

ea

2296

.220

6.63

203.

3314

9.26

112.

6210

2.14

100.

79

UJA

1501

4JN

G23

(LH

SI) T

ank

& Lo

op 2

Ann

ular

Ar

ea

2932

.426

3.88

259.

6619

0.61

143.

8313

0.44

128.

72

UJA

1501

5JN

G33

(LH

SI) T

ank

& Lo

op 3

Ann

ular

Ar

ea

3110

.027

9.86

275.

3920

2.15

152.

5413

8.34

136.

52

UJA

1501

6JN

G43

(LH

SI) T

ank

& Lo

op 4

Ann

ular

Ar

ea

2526

.522

7.35

223.

7216

4.23

123.

9211

2.38

110.

90U

JA15

017

Cor

e In

tern

als

Stor

age

Roo

m

426.

338

.36

37.7

527

.71

20.9

118

.96

18.7

1U

JA15

018

Spra

y Li

nes

Area

93

7.6

84.3

783

.02

60.9

545

.99

41.7

141

.16

UJA

1501

9Su

rge

Line

Are

a 11

24.9

101.

2399

.61

73.1

255

.17

50.0

449

.38

UJA

1502

0Ac

cess

to T

rans

fer T

ube

Com

partm

ent

793.

471

.40

70.2

651

.57

38.9

135

.29

34.8

3U

JA15

021

Tran

sfer

Tub

e C

ompa

rtmen

t 79

7.7

71.7

870

.64

51.8

539

.13

35.4

835

.02

UJA

1502

3In

stru

men

tatio

n La

nces

Sto

rage

50

3.8

45.3

444

.61

32.7

524

.71

22.4

122

.11

DRAF

T.4

4.4

442

.33

42.3

T42

.33

42.

T12

8.11

28.1

19

FT7979

110.

010180

FT4.

384.

3812

2.39

8

FT12

6.80

126

124.

781 FT

117.

3117

.31

115.

43

AFT

6611

7.31.31

115.

4

AAF9.

1.112

6.80

126.

8012

4

AAF38

2.22

124.

3812

4.38

RAAF

1242

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1.79

111.

79

RAA647.

064

58.2

2

RRA806.380672.

RRA313.3313.32 RRAAn

nula

r ar22

96.2

2 DRRop

2 A

nnul

ar

op 2

Ann

ular

29

393 DRp

3 An

nula

r p

3 A

DDAn

nula

r An

nula

r

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

13 o

f 40

Roo

m

Des

crip

tion

Are

a of

W

alls

(ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

Roo

m

UJA

1502

4Ac

cess

to R

eact

or C

avity

39

6.2

35.6

535

.08

25.7

519

.43

17.6

217

.39

UJA

1502

5FA

L (F

PPS)

Roo

m

564.

150

.76

49.9

536

.67

27.6

725

.09

24.7

6U

JA15

026

HVA

C

648.

158

.32

57.3

942

.13

31.7

928

.83

28.4

5U

JA15

027

HVA

C

648.

158

.32

57.3

942

.13

31.7

928

.83

28.4

5U

JA18

001

Rea

ctor

Cav

ity

2099

.218

8.90

185.

8813

6.45

102.

9693

.37

92.1

5U

JA18

002

JEB1

0 Pu

mp

(RC

P) R

oom

17

84.8

160.

6115

8.04

116.

0187

.54

79.3

978

.35

UJA

1800

3JE

A10

(SG

) Roo

m

1356

.412

2.06

120.

1188

.17

66.5

360

.33

59.5

4U

JA18

004

JEA2

0 (S

G) R

oom

13

95.1

125.

5412

3.54

90.6

868

.43

62.0

661

.24

UJA

1800

5JE

B20

Pum

p (R

CP)

Roo

m

1872

.016

8.46

165.

7612

1.68

91.8

283

.27

82.1

7U

JA18

006

JEB3

0 Pu

mp

(RC

P) R

oom

18

72.0

168.

4616

5.76

121.

6891

.82

83.2

782

.17

UJA

1800

7JE

A30

(SG

) Roo

m

1395

.112

5.54

123.

5490

.68

68.4

362

.06

61.2

4U

JA18

008

JEA4

0 (S

G) R

oom

13

56.4

122.

0612

0.11

88.1

766

.53

60.3

359

.54

UJA

1800

9JE

B40

Pum

p (R

CP)

Roo

m

1784

.816

0.61

158.

0411

6.01

87.5

479

.39

78.3

5U

JA18

010

Sout

h St

airc

ase

929.

083

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82.2

660

.39

45.5

741

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40.7

8U

JA18

011

Nor

th S

tairc

ase

1158

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4.23

102.

5775

.29

56.8

151

.52

50.8

4U

JA18

012

Elev

ator

58

6.7

52.8

051

.95

38.1

428

.78

26.1

025

.75

UJA

1801

3JN

G13

(LH

SI) T

ank

& Lo

op 1

Ann

ular

Ar

ea

3763

.433

8.66

333.

2524

4.63

184.

5916

7.40

165.

20

UJA

1801

4JN

G23

(LH

SI) T

ank

& Lo

op 2

Ann

ular

Ar

ea

4494

.440

4.44

397.

9829

2.14

220.

4419

9.92

197.

29

UJA

1801

5JN

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(LH

SI) T

ank

& Lo

op 3

Ann

ular

Ar

ea

4203

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8.28

372.

2427

3.25

206.

1818

6.98

184.

52

UJA

1801

6JN

G43

(LH

SI) T

ank

& Lo

op 4

Ann

ular

Ar

ea

3830

.234

4.67

339.

1624

8.97

187.

8617

0.37

168.

13U

JA18

017

Cor

e In

tern

als

Stor

age

Roo

m

1707

.315

3.63

151.

1811

0.98

83.7

475

.94

74.9

4U

JA18

018

Spra

y Li

nes

Area

17

23.5

155.

0915

2.62

112.

0384

.53

76.6

675

.65

UJA

1801

9Su

rge

Line

Are

a 17

23.5

155.

0915

2.62

112.

0384

.53

76.6

675

.65

UJA

1802

0C

orrid

or

1002

.290

.18

88.7

465

.14

49.1

644

.58

43.9

9U

JA18

021

Tran

sfer

Tub

e C

ompa

rtmen

t 10

88.3

97.9

396

.37

70.7

453

.38

48.4

147

.77

UJA

1802

3In

stru

men

tatio

n La

nces

Sto

rage

R

oom

11

89.5

107.

0410

5.33

77.3

258

.34

52.9

152

.21

DRAF

T.9

5.9

557

.39

57.3

T57

.39

57.

T18

5.88

85.8

813

FT6161

158.

040411

6

FT2.

062.

0612

0.11

8

FT12

5.54

125

123.

541 FT

168.

4668

.46

165.

76

AFT

0016

8.46.46

165.

7

AAF5.

1.112

5.54

125.

5412

3

AAF35

6.44

122.

0612

2.06

RAAF

1784

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0.61

160.

61

RAA929.

092

83.6

0

RRA1158.3158104.

1 RRA586.7586.75 RRAAn

nula

r ar37

63.4

3 DRRop

2 A

nnul

ar

op 2

Ann

ular

44

949 DRp

3 An

nula

r p

3 A

DDAn

nula

r An

nula

r

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

14 o

f 40

Roo

m

Des

crip

tion

Are

a of

W

alls

(ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

UJA

1802

6H

VAC

93

1.2

83.8

082

.46

60.5

345

.67

41.4

240

.88

UJA

1802

7H

VAC

93

1.2

83.8

082

.46

60.5

345

.67

41.4

240

.88

UJA

2300

1R

eact

or C

avity

19

14.0

172.

2316

9.48

124.

4193

.88

85.1

484

.02

UJA

2300

2JE

B10

Pum

p (R

CP)

Roo

m

1644

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8.02

145.

6610

6.92

80.6

873

.17

72.2

0U

JA23

003

JEA1

0 (S

G) R

oom

15

16.8

136.

4913

4.31

98.5

974

.40

67.4

766

.58

UJA

2300

4JE

A20

(SG

) Roo

m

1559

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0.36

138.

1210

1.39

76.5

069

.38

68.4

7U

JA23

005

JEB2

0 Pu

mp

(RC

P) R

oom

20

92.7

188.

3218

5.31

136.

0310

2.64

93.0

991

.86

UJA

2300

6JE

B30

Pum

p (R

CP)

Roo

m

2092

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8.32

185.

3113

6.03

102.

6493

.09

91.8

6U

JA23

007

JEA3

0 (S

G) R

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15

59.8

140.

3613

8.12

101.

3976

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69.3

868

.47

UJA

2300

8JE

A40

(SG

) Roo

m

1516

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6.49

134.

3198

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74.4

067

.47

66.5

8U

JA23

009

JEB4

0 Pu

mp

(RC

P) R

oom

16

44.9

148.

0214

5.66

106.

9280

.68

73.1

772

.20

UJA

2301

0So

uth

Stai

rcas

e 10

38.8

93.4

891

.99

67.5

250

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46.2

145

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UJA

2301

1N

orth

Sta

ircas

e 12

95.0

116.

5311

4.67

84.1

863

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57.6

056

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UJA

2301

2El

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655.

659

.00

58.0

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32.1

629

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28.7

8

UJA

2301

3JN

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(LH

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ank

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Ann

ular

Ar

ea

3781

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0.30

334.

8724

5.82

185.

4816

8.21

166.

00

UJA

2301

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(LH

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ank

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Ann

ular

Ar

ea

4111

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9.94

364.

0426

7.23

201.

6418

2.87

180.

46

UJA

2301

5JN

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(LH

SI) T

ank

& Lo

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Ann

ular

Ar

ea

3843

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5.83

340.

3024

9.81

188.

4917

0.95

168.

70

UJA

2301

6JN

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(LH

SI) T

ank

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Ann

ular

Ar

ea

3829

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4.57

339.

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8.90

187.

8117

0.32

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JA23

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HVA

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2993

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9.39

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4.59

146.

8313

3.16

131.

41U

JA23

018

HVA

C

1437

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9.32

127.

2593

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70.4

963

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63.0

8U

JA23

019

JEF1

0 (R

CS)

Pre

ssur

izer

Roo

m

1966

.817

6.99

174.

1612

7.84

96.4

787

.49

86.3

3U

JA23

020

FAL

(FPP

S) V

alve

Roo

m

920.

482

.82

81.5

059

.83

45.1

440

.94

40.4

0U

JA23

021

Tran

sfer

Tub

e C

ompa

rtmen

t 12

16.4

109.

4610

7.71

79.0

759

.66

54.1

153

.39

UJA

2302

3In

stru

men

tatio

n La

nces

Sto

rage

R

oom

13

16.6

118.

4811

6.58

85.5

864

.58

58.5

657

.79

UJA

2302

6H

VAC

Duc

t 64

8.1

58.3

257

.39

42.1

331

.79

28.8

328

.45

UJA

2302

7H

VAC

Duc

t 64

8.1

58.3

257

.39

42.1

331

.79

28.8

328

.45

UJA

2303

1FA

L (F

PPS)

Pum

p R

oom

92

4.7

83.2

181

.88

60.1

145

.35

41.1

340

.59

DRAF

T.4

8.4

845

.66

45.6

T13

4.31

134.

T13

8.12

38.1

210

FT3232

185.

313113

6

FT8.

328.

3218

5.31

13

FT14

0.36

140

138.

121 FT

136.

4936

.49

134.

31

AFT

9914

8.02.02

145.

6

AAF8.

8.893

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93.4

891 AAF

295.

0011

6.53

116.

53

RAAF

655.

659

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0

RAA3781.7781340.

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lar

ular

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1

DRRA

3 An

nula

r 3

Annu

lar

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4 DRRoo

p 4

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lar

oop

4 An

nula

r 3 DRD

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

15 o

f 40

Roo

m

Des

crip

tion

Are

a of

W

alls

(ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

UJA

2304

1In

stru

men

tatio

n M

easu

ring

Tabl

e R

oom

91

7.2

82.5

481

.22

59.6

244

.99

40.8

040

.26

UJA

2304

2In

stru

men

tatio

n M

easu

ring

Cab

inet

s R

oom

12

40.1

111.

5910

9.81

80.6

160

.82

55.1

654

.44

UJA

2900

3JE

A10

(SG

) Roo

m

1174

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5.69

104.

0076

.34

57.6

152

.24

51.5

6U

JA29

004

JEA2

0 (S

G) R

oom

11

669.

210

50.0

710

33.3

075

8.51

572.

3551

9.06

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23U

JA29

005

JEB2

0 Pu

mp

(RC

P) R

oom

11

21.7

100.

9499

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72.9

155

.02

49.8

949

.24

UJA

2900

6JE

B30

Pum

p (R

CP)

Roo

m

1179

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6.17

104.

4776

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57.8

752

.48

51.7

9U

JA29

007

JEA3

0 (S

G) R

oom

11

66.9

105.

0110

3.33

75.8

557

.23

51.9

051

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UJA

2900

8JE

A40

(SG

) Roo

m

1174

.510

5.69

104.

0076

.34

57.6

152

.24

51.5

6U

JA29

011

Nor

th S

tairc

ase

1031

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91.3

267

.04

50.5

845

.87

45.2

7U

JA29

012

Elev

ator

40

5.8

36.5

235

.93

26.3

819

.90

18.0

517

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UJA

2901

3Se

tdow

n Ar

ea, O

pera

ting

floor

40

21.8

361.

9135

6.13

261.

4219

7.26

178.

8917

6.54

UJA

2901

4An

nula

r Are

a, 2

40-0

Deg

36

99.9

332.

9432

7.62

240.

5018

1.47

164.

5816

2.41

UJA

2901

5An

nula

r Are

a, 0

-120

Deg

34

23.3

308.

0530

3.13

222.

5216

7.90

152.

2715

0.27

UJA

2901

6Ac

cess

to E

quip

men

t Hat

ch

2988

.426

8.92

264.

6219

4.25

146.

5713

2.93

131.

18U

JA29

018

Acce

ss to

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ratin

g Fl

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1156

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4.04

102.

3875

.15

56.7

151

.43

50.7

5U

JA29

019

JEF1

0 (R

CS)

Pre

ssur

izer

Roo

m

1385

.512

4.68

122.

6990

.06

67.9

661

.63

60.8

2

UJA

2902

2KL

A51/

52 C

ompr

esso

r & K

LA50

Filt

er

(CBV

S) R

oom

15

67.4

141.

0513

8.79

101.

8876

.88

69.7

268

.80

UJA

2902

3Ac

cess

to E

mer

genc

y Ai

rlock

14

41.4

129.

7112

7.64

93.6

970

.70

64.1

163

.27

UJA

2902

5H

VAC

Sha

ft 48

3.3

43.4

942

.80

31.4

223

.70

21.5

021

.21

UJA

2902

6H

VAC

Sha

ft 48

3.3

43.4

942

.80

31.4

223

.70

21.5

021

.21

UJA

3400

3JE

A10

(SG

) Roo

m

1863

.416

7.68

165.

0012

1.12

91.4

082

.89

81.8

0U

JA34

004

JEA2

0 (S

G) R

oom

18

51.6

166.

6216

3.96

120.

3690

.82

82.3

681

.28

UJA

3400

5JE

B20

Pum

p (R

CP)

Roo

m

1072

.296

.48

94.9

469

.69

52.5

947

.69

47.0

7U

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0 Pu

mp

(RC

P) R

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11

28.2

101.

5299

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73.3

355

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50.1

849

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UJA

3400

7JE

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(SG

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163.

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0.36

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81.2

8U

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0 (S

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18

63.4

167.

6816

5.00

121.

1291

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82.8

981

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3401

1N

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2.3

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56.0

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38.3

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UJA

3401

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344.

531

.00

30.5

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DRAF

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5.69

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RAAF

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05

RRA2988.4988268

2 RRA1156.21156.211 DRRA

om

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rlock

rlo

ck

14 DRDD

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

16 o

f 40

Roo

m

Des

crip

tion

Are

a of

W

alls

(ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

UJA

3401

4An

nula

r Are

a, 2

40-0

Deg

52

05.9

468.

4646

0.98

338.

3925

5.34

231.

5622

8.52

UJA

3401

5An

nula

r Are

a, 0

-120

Deg

41

89.7

377.

0237

1.00

272.

3420

5.49

186.

3618

3.91

UJA

3401

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ead

Stor

age

Area

14

31.7

128.

8312

6.78

93.0

670

.22

63.6

862

.85

UJA

3401

9Pr

essu

rizer

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ty R

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f Va

lves

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579

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77.8

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(RPS

) Val

ve R

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97

1.0

87.3

885

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63.1

247

.63

43.1

942

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UJA

3402

5H

VAC

Sha

ft 34

8.8

31.3

930

.89

22.6

717

.11

15.5

115

.31

UJA

3402

6H

VAC

Sha

ft 34

8.8

31.3

930

.89

22.6

717

.11

15.5

115

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UJA

4100

3JE

A10

(SG

) Roo

m

842.

975

.85

74.6

454

.79

41.3

437

.49

37.0

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JA41

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JEA2

0 (S

G) R

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83

7.5

75.3

674

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54.4

441

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37.2

536

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UJA

4100

7JE

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(SG

) Roo

m

837.

575

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74.1

654

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41.0

837

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36.7

6U

JA41

008

JEA4

0 (S

G) R

oom

84

2.9

75.8

574

.64

54.7

941

.34

37.4

937

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UJA

4101

3Se

tdow

n Ar

ea, O

pera

ting

floor

70

00.5

629.

9561

9.89

455.

0434

3.36

311.

3930

7.29

UJA

4101

4An

nula

r Are

a, 2

40-0

Deg

55

97.8

503.

7349

5.68

363.

8627

4.56

249.

0024

5.72

UJA

4101

5An

nula

r Are

a, 0

-120

Deg

52

02.7

468.

1746

0.70

338.

1825

5.18

231.

4222

8.38

UJA

4000

1D

ome

2521

4.8

2269

.00

2232

.76

1639

.00

1236

.73

1121

.58

1106

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Sum

2721

7.19

2678

2.52

1966

0.19

1483

4.84

1345

3.65

1327

6.64

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erta

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tor

2721

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1966

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318.

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8.7

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9.95

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22 RRASumSum272272 RRRRARARARA%

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tor

rtain

ty F

acto

r RRRRRRTo

tal

To DRDRDRRRDRDRDRR

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

17 o

f 40

Tabl

e 06

.02.

02-7

2-3—

Cei

ling

Con

dens

ate

Mas

s pe

r Squ

are

Foot

Para

met

er

Dur

ing

Blo

wdo

wn

Dur

ing

Ref

ill/R

eflo

odD

urin

g Po

st

Ref

lood

Ti

me

of P

eak

Con

t. Pr

essu

re

Tim

e of

Pea

k IR

WST

Tem

p Ti

me

of H

alf

Peak

Pre

ssur

e

Tim

e (s

) 29

.18

60.0

9 60

0.10

36

00.1

1 12

304.

73

4012

2.71

C

onta

inm

ent P

ress

ure,

(p

sia)

66

.37

63.4

4 65

.15

69.2

7

61.6

3

41.9

7

Surfa

ce T

ensi

on (l

bm/h

r²)

1.40

3e6

1.41

2e6

1.40

7e6

1.39

3e6

1.

419e

6 1.

502e

6 Li

quid

Den

sity

(lbm

/ft³)

57.3

3 57

.42

57.3

7 57

.24

57

.49

58.2

4 Va

por D

ensi

ty (l

bm/ft

³) 0.

1532

0.

1468

0.

1505

0.

1595

0.

1429

0.

0996

M

axim

um D

rop

Rad

ius

(ft)

1.32

9e-2

1.

332e

-2

1.33

0e-2

1.

325e

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1.33

4e-2

1.

363e

-2

Volu

me

of O

ne D

rop

(ft³)

4.91

2e-6

4.

947e

-6

4.92

8e-6

4.

872e

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4.97

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5.

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Num

ber o

f Dro

ps p

er

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re F

oot (

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16.1

75

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14

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14

04.3

78

1345

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Volu

me

of D

rops

per

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uare

Foo

t (ft³

/ft²)

6.95

7e-3

6.

973e

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6.96

4e-3

6.

938e

-3

6.98

6e-3

7.

138e

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1.39

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37

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6 AFTFTFTFT

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14

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6.

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AAAF RARARARA

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

18 o

f 40

Tabl

e 06

.02.

02-7

2-4—

Mas

s of

Con

dens

ate

on C

eilin

g

Roo

m

Des

crip

tion

Cei

ling

Are

a (ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

UJA

0400

2 Sp

read

ing

Area

22

29.4

288

9.17

892.

6689

0.72

885.

3589

5.39

926.

83U

JA04

003

IRW

ST

1767

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704.

9870

7.75

706.

2270

1.95

709.

9173

4.84

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0400

4 KT

(NI D

VS) S

ump

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m

UJA

0400

5 Fl

oodi

ng D

evic

e C

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t U

JA04

006

Floo

ding

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partm

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UJA

0401

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evat

or

UJA

0401

3 Ac

cess

Are

a U

JA07

001

Rea

ctor

Cav

ity

UJA

0700

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WST

Are

a 41

02.5

316

36.2

316

42.6

616

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916

29.2

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p R

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78

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31.5

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U

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U

JA07

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ss A

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3.19

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4 Pi

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enet

ratio

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2053

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1882

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6281

5.67

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9185

3.88

UJA

0701

5 Pi

pe P

enet

ratio

ns

2090

.56

833.

7983

7.06

835.

2483

0.20

839.

6286

9.10

UJA

0701

6 Pi

pe P

enet

ratio

ns

2090

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833.

7983

7.06

835.

2483

0.20

839.

6286

9.10

UJA

0701

7 Ve

ntin

g Ar

ea fo

r Spr

eadi

ng

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partm

ent

UJA

0701

8 LC

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) HX

Roo

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0542

3.70

422.

7842

0.23

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0043

9.92

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JA07

020

KT (N

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or D

rain

and

Ta

nk R

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34

2.33

136.

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7.07

136.

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5.95

137.

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2.32

U

JA07

021

KTA1

0 (N

I DVS

) HX

Roo

m

117.

3446

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46.9

846

.88

46.6

047

.13

48.7

8

UJA

0702

2 KT

A10

(NI D

VS) P

umps

Roo

m

361.

7014

4.26

144.

8314

4.51

143.

6414

5.27

150.

37

UJA

0702

3 KT

A10

(NI D

VS) F

loor

Dra

in a

nd

Tank

Roo

m

291.

7311

6.35

116.

8111

6.56

115.

8511

7.17

121.

28

UJA

0702

4 KT

(RC

DT)

Tan

k R

oom

32

9.41

131.

3813

1.90

131.

6113

0.82

132.

3013

6.94

U

JA07

026

KBA1

2 (C

VCS)

HX

Roo

m

184.

0873

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73.7

173

.55

73.1

073

.93

76.5

3

UJA

0702

7 KB

A11

(CVC

S) H

X R

oom

17

6.55

70.4

170

.69

70.5

470

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70.9

173

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U

JA07

028

KBA

(CVC

S) V

alve

Roo

m

153.

9461

.40

61.6

461

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61.1

361

.83

64.0

0

UJA

0702

9 KB

A (C

VCS)

Val

ve R

oom

12

2.72

48.9

449

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49.0

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49.2

951

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U

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001

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TTTFFTFFTFFT AFFT

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4.37 RAA

2053

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2053

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9 RAA20

90.5

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90.5

683

3.79

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2090

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n an

d n

and

D342

3 D11 Dm

m

DD

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

19 o

f 40

Roo

m

Des

crip

tion

Cei

ling

Are

a (ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

UJA

1100

2 JE

B10

(RC

P) O

il C

olle

ctio

n Ta

nk A

rea

UJA

1100

3 JE

A10

(SG

) Sup

ports

Are

a U

JA11

004

JEA2

0 (S

G) S

uppo

rts A

rea

UJA

1100

5 JE

B20

(RC

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il C

olle

ctio

n Ta

nk A

rea

UJA

1100

6 JE

B30

(RC

P) O

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n Ta

nk A

rea

UJA

1100

7 JE

A30

(SG

) Sup

ports

Are

a U

JA11

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JEA4

0 (S

G) S

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UJA

1100

9 JE

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(RC

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n Ta

nk A

rea

UJA

1101

0 So

uth

Stai

rcas

e U

JA11

012

Elev

ator

UJA

1101

3 Lo

op 1

Ann

ular

Are

a 18

0-27

0 D

eg

1556

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620.

8362

3.27

621.

9161

8.16

625.

1764

7.12

UJA

1101

4 Lo

op 2

Ann

ular

Are

a 27

0-0

Deg

10

53.8

942

0.33

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1.06

418.

5242

3.27

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13

UJA

1101

5 Lo

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Ann

ular

Are

a 0-

90 D

eg

1191

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7.15

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3.24

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UJA

1101

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ular

Are

a 90

-180

D

eg

1599

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0.51

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1263

5.26

642.

4666

5.03

UJA

1101

8 LC

Q50

(SG

BS) T

ank

Roo

m

641.

5925

5.89

256.

8925

6.34

254.

7925

7.68

266.

73

UJA

1101

9 JE

G (P

RT)

Tan

k R

oom

47

2.58

188.

4818

9.22

188.

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7.67

189.

8019

6.46

U

JA11

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Acce

ss to

Per

sonn

el A

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k 10

33.4

441

2.17

413.

7941

2.89

410.

4041

5.05

429.

63

UJA

1102

1 FA

L (F

PPS)

Val

ve R

oom

12

3.80

49.3

849

.57

49.4

649

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49.7

251

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U

JA11

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(CVC

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alve

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m

134.

5653

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53.8

853

.76

53.4

454

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55.9

4

UJA

1102

3 KB

A (C

VCS)

Val

ve R

oom

31

2.18

124.

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5.00

124.

7312

3.97

125.

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U

JA11

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KBA1

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VCS)

HX

Roo

m

215.

3085

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86.2

186

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85.5

086

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89.5

1

UJA

1102

5 JN

D &

JN

G (M

HSI

& L

HSI

) Va

lve

1 R

oom

19

5.92

78.1

478

.45

78.2

877

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78.6

981

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UJA

1102

6 JN

D &

JN

G (M

HSI

& L

HSI

) Va

lve

2 R

oom

19

5.92

78.1

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78.2

877

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78.6

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U

JA11

027

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& J

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SI &

LH

SI)

157.

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TTFTFFTFFT AFFTAAFF RAAFRAA

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1556

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53.8

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0.42

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1599

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m

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59oo

m

641.

59 DD472

4 D1010 DDD

AR

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A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

20 o

f 40

Roo

m

Des

crip

tion

Cei

ling

Are

a (ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

Valv

e 3

Roo

m

62.6

862

.93

62.7

962

.42

63.1

265

.34

UJA

1102

8 JN

D &

JN

G (M

HSI

& L

HSI

) Va

lve

4 R

oom

19

5.92

78.1

478

.45

78.2

877

.80

78.6

981

.45

UJA

1103

1 Ac

cess

to L

oop

1 &

2 Ar

ea

88.2

735

.21

35.3

435

.27

35.0

535

.45

36.7

0

UJA

1103

2 Ac

cess

to L

oop

3 &

4 Ar

ea

88.2

735

.21

35.3

435

.27

35.0

535

.45

36.7

0

UJA

1101

7 Ve

ntin

g Ar

ea fo

r Spr

eadi

ng

Com

partm

ent

79.6

631

.77

31.9

031

.83

31.6

331

.99

33.1

2

UJA

1500

1 R

eact

or C

avity

U

JA15

002

JEB1

0 Pu

mp

(RC

P) R

oom

U

JA15

003

JEA1

0 (S

G) S

uppo

rt Ar

ea

UJA

1500

4 JE

A20

(SG

) Sup

port

Area

U

JA15

005

JEB2

0 Pu

mp

(RC

P) R

oom

U

JA15

006

JEB3

0 Pu

mp

(RC

P) R

oom

U

JA15

007

JEA3

0 (S

G) S

uppo

rt Ar

ea

UJA

1500

8 JE

A40

(SG

) Sup

port

Area

U

JA15

009

JEB4

0 Pu

mp

(RC

P) R

oom

U

JA15

010

Sout

h St

airc

ase

UJA

1501

1 N

orth

Sta

ircas

e U

JA15

012

Elev

ator

UJA

1501

3 JN

G13

(LH

SI) T

ank

& Lo

op 1

An

nula

r Are

a

UJA

1501

4 JN

G23

(LH

SI) T

ank

& Lo

op 2

An

nula

r Are

a

UJA

1501

5 JN

G33

(LH

SI) T

ank

& Lo

op 3

An

nula

r Are

a

UJA

1501

6 JN

G43

(LH

SI) T

ank

& Lo

op 4

An

nula

r Are

a U

JA15

017

Cor

e In

tern

als

Stor

age

Roo

m

UJA

1501

8 Sp

ray

Line

s Ar

ea

469.

3518

7.19

187.

9318

7.52

186.

3918

8.50

195.

12

UJA

1501

9 Su

rge

Line

Are

a 54

4.71

217.

2521

8.10

217.

6321

6.32

218.

7722

6.45

UJA

1502

0 Ac

cess

to T

rans

fer T

ube

Com

partm

ent

219

.61

87.5

987

.93

87.7

487

.21

88.2

091

.30

DRAF

TT5.

345.

34

T35

.34

35.3

4

T31

.90

31.8

FFTFFTFFT AFFTAFFAAF RAAFRAARAARARA DRDR

op 1

op

1

DRop

2

op 2

DD

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

21 o

f 40

Roo

m

Des

crip

tion

Cei

ling

Are

a (ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

UJA

1502

1 Tr

ansf

er T

ube

Com

partm

ent

UJA

1502

3 In

stru

men

tatio

n La

nces

Sto

rage

R

oom

U

JA15

024

Acce

ss to

Rea

ctor

Cav

ity

55.9

822

.33

22.4

122

.37

22.2

322

.48

23.2

7 U

JA15

025

FAL

(FPP

S) R

oom

15

8.24

63.1

163

.36

63.2

262

.84

63.5

565

.78

UJA

1502

6 H

VAC

U

JA15

027

HVA

C

UJA

1800

1 R

eact

or C

avity

U

JA18

002

JEB1

0 Pu

mp

(RC

P) R

oom

U

JA18

003

JEA1

0 (S

G) R

oom

U

JA18

004

JEA2

0 (S

G) R

oom

U

JA18

005

JEB2

0 Pu

mp

(RC

P) R

oom

U

JA18

006

JEB3

0 Pu

mp

(RC

P) R

oom

U

JA18

007

JEA3

0 (S

G) R

oom

U

JA18

008

JEA4

0 (S

G) R

oom

U

JA18

009

JEB4

0 Pu

mp

(RC

P) R

oom

U

JA18

010

Sout

h St

airc

ase

UJA

1801

1 N

orth

Sta

ircas

e U

JA18

012

Elev

ator

UJA

1801

3 JN

G13

(LH

SI) T

ank

& Lo

op 1

An

nula

r Are

a

UJA

1801

4 JN

G23

(LH

SI) T

ank

& Lo

op 2

An

nula

r Are

a

UJA

1801

5 JN

G33

(LH

SI) T

ank

& Lo

op 3

An

nula

r Are

a

UJA

1801

6 JN

G43

(LH

SI) T

ank

& Lo

op 4

An

nula

r Are

a U

JA18

017

Cor

e In

tern

als

Stor

age

Roo

m

UJA

1801

8 Sp

ray

Line

s Ar

ea

544.

7121

7.25

218.

1021

7.63

216.

3221

8.77

226.

45U

JA18

019

Surg

e Li

ne A

rea

544.

7121

7.25

218.

1021

7.63

216.

3221

8.77

226.

45U

JA18

020

Cor

ridor

11

7.34

46.8

046

.98

46.8

846

.60

47.1

348

.78

UJA

1802

1 Tr

ansf

er T

ube

Com

partm

ent

DRAF

TT2.

412.

41

T63

.36

63.3

6

TFTFFTFFTFFT AFFTAFFAAF RAAFRAARAARARA DRDR

op 1

op

1

DRop

2

op 2

DD

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

22 o

f 40

Roo

m

Des

crip

tion

Cei

ling

Are

a (ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

UJA

1802

3 In

stru

men

tatio

n La

nces

Sto

rage

R

oom

U

JA18

026

HVA

C

UJA

1802

7 H

VAC

U

JA23

001

Rea

ctor

Cav

ity

767.

5430

6.12

307.

3230

6.66

304.

8130

8.26

319.

09

UJA

2300

2 JE

B10

Pum

p (R

CP)

Roo

m

442.

4417

6.46

177.

1517

6.77

175.

7017

7.69

183.

93

UJA

2300

3 JE

A10

(SG

) Roo

m

UJA

2300

4 JE

A20

(SG

) Roo

m

UJA

2300

5 JE

B20

Pum

p (R

CP)

Roo

m

UJA

2300

6 JE

B30

Pum

p (R

CP)

Roo

m

UJA

2300

7 JE

A30

(SG

) Roo

m

UJA

2300

8 JE

A40

(SG

) Roo

m

UJA

2300

9 JE

B40

Pum

p (R

CP)

Roo

m

442.

4417

6.46

177.

1517

6.77

175.

7017

7.69

183.

93U

JA23

010

Sout

h St

airc

ase

UJA

2301

1 N

orth

Sta

ircas

e U

JA23

012

Elev

ator

UJA

2301

3 JN

G13

(LH

SI) T

ank

& Lo

op 1

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nula

r Are

a 15

04.9

460

0.22

602.

5860

1.27

597.

6460

4.42

625.

64

UJA

2301

4 JN

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(LH

SI) T

ank

& Lo

op 2

An

nula

r Are

a 15

59.8

462

2.12

624.

5662

3.20

619.

4462

6.47

648.

47

UJA

2301

5 JN

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(LH

SI) T

ank

& Lo

op 3

An

nula

r Are

a 16

52.4

265

9.04

661.

6366

0.19

656.

2166

3.65

686.

96

UJA

2301

6 JN

G43

(LH

SI) T

ank

& Lo

op 4

An

nula

r Are

a 16

34.1

265

1.74

654.

3065

2.88

648.

9465

6.30

679.

35U

JA23

017

HVA

C

831.

0533

1.45

332.

7533

2.03

330.

0333

3.77

345.

49U

JA23

018

HVA

C

348.

7813

9.11

139.

6513

9.35

138.

5114

0.08

145.

00U

JA23

019

JEF1

0 (R

CS)

Pre

ssur

izer

Roo

m

540.

4021

5.53

216.

3821

5.91

214.

6021

7.04

224.

66U

JA23

020

FAL

(FPP

S) V

alve

Roo

m

103.

3441

.22

41.3

841

.29

41.0

441

.50

42.9

6 U

JA23

021

Tran

sfer

Tub

e C

ompa

rtmen

t

UJA

2302

3 In

stru

men

tatio

n La

nces

Sto

rage

R

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U

JA23

026

HVA

C D

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49.5

219

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19.8

319

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19.6

719

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20.5

9

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TTT30

7.32

307.

323 T

177.

1517

7.15

176

FTFFTFFTFFT AFFTAFFAAF

4417

6.46

76.4

61717

RAAFRAARAARA

1504

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1504

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2 2 15

59.8

415

59.8

4 DRoo

p 3

oop

1652

16 D44

DD

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

23 o

f 40

Roo

m

Des

crip

tion

Cei

ling

Are

a (ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

UJA

2302

7 H

VAC

Duc

t 49

.52

19.7

519

.83

19.7

819

.67

19.8

920

.59

U

JA23

031

FAL

(FPP

S) P

ump

Roo

m

93.6

637

.35

37.5

037

.42

37.1

937

.62

38.9

4

UJA

2304

1 In

stru

men

tatio

n M

easu

ring

Tabl

e R

oom

17

1.16

68.2

668

.53

68.3

867

.97

68.7

471

.16

UJA

2304

2 In

stru

men

tatio

n M

easu

ring

Cab

inet

s R

oom

27

3.43

109.

0510

9.48

109.

2410

8.58

109.

8211

3.67

U

JA29

003

JEA1

0 (S

G) R

oom

U

JA29

004

JEA2

0 (S

G) R

oom

U

JA29

005

JEB2

0 Pu

mp

(RC

P) R

oom

U

JA29

006

JEB3

0 Pu

mp

(RC

P) R

oom

U

JA29

007

JEA3

0 (S

G) R

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U

JA29

008

JEA4

0 (S

G) R

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U

JA29

011

Nor

th S

tairc

ase

UJA

2901

2 El

evat

or

UJA

2901

3 Se

tdow

n Ar

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pera

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floor

U

JA29

014

Annu

lar A

rea,

240

-0 D

eg

2025

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808.

0281

1.20

809.

4480

4.55

813.

6884

2.25

UJA

2901

5 An

nula

r Are

a, 0

-120

Deg

11

52.9

345

9.83

461.

6346

0.63

457.

8546

3.04

479.

30U

JA29

016

Acce

ss to

Equ

ipm

ent H

atch

U

JA29

018

Acce

ss to

Ope

ratin

g Fl

oor

659.

8926

3.19

264.

2226

3.65

262.

0626

5.03

274.

33U

JA29

019

JEF1

0 (R

CS)

Pre

ssur

izer

Roo

m

540.

4021

5.53

216.

3821

5.91

214.

6021

7.04

224.

66

UJA

2902

2 KL

A51/

52 C

ompr

esso

r & K

LA50

Fi

lter (

CBV

S) R

oom

62

7.60

250.

3125

1.29

250.

7524

9.23

252.

0626

0.91

UJA

2902

3 Ac

cess

to E

mer

genc

y Ai

rlock

58

7.77

234.

4223

5.34

234.

8323

3.42

236.

0624

4.35

UJA

2902

5 H

VAC

Sha

ft U

JA29

026

HVA

C S

haft

UJA

3400

3 JE

A10

(SG

) Roo

m

UJA

3400

4 JE

A20

(SG

) Roo

m

UJA

3400

5 JE

B20

Pum

p (R

CP)

Roo

m

UJA

3400

6 JE

B30

Pum

p (R

CP)

Roo

m

UJA

3400

7 JE

A30

(SG

) Roo

m

UJA

3400

8 JE

A40

(SG

) Roo

m

UJA

3401

1 N

orth

Sta

ircas

e 19

4.85

77.7

178

.02

77.8

577

.38

78.2

681

.00

DRAF

T8.

538.

53

T10

9.48

109.

4810

9

FTFFTFFTFFT AFFTAFFAAF RAAFRAARAA

2025

.97

2025

.97

808.

0280

8 RA11

52.9

32.

9345

9.45

9. RA DDR659.

8965

9. DRr R

oom

54

0.40

r Roo

m

540.

40 DR&

KLA5

0 &

KL62

7.60

627.

60 Dk

5k

5 DDD

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

24 o

f 40

Roo

m

Des

crip

tion

Cei

ling

Are

a (ft

2 )

Mas

s at

29

sec

(lb

)

Mas

s at

60

sec

(lb

)

Mas

s at

60

0 se

c (lb

)

Mas

s at

36

00 s

ec

(lb)

Mas

s at

12

304

sec

(lb)

Mas

s at

40

122

sec

(lb)

UJA

3401

2 El

evat

or

60.2

824

.04

24.1

424

.08

23.9

424

.21

25.0

6 U

JA34

013

Setd

own

Area

, Ope

ratin

g flo

or

UJA

3401

4 An

nula

r Are

a, 2

40-0

Deg

U

JA34

015

Annu

lar A

rea,

0-1

20 D

eg

1596

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636.

7163

9.22

637.

8363

3.98

641.

1766

3.68

UJA

3401

8 R

PV C

losu

re H

ead

Stor

age

Area

UJA

3401

9 Pr

essu

rizer

Hea

d &

Safe

ty R

elie

f Va

lves

Roo

m

540.

4021

5.53

216.

3821

5.91

214.

6021

7.04

224.

66U

JA34

022

JEG

(RPS

) Val

ve R

oom

22

3.91

89.3

089

.65

89.4

688

.92

89.9

393

.09

UJA

3402

5 H

VAC

Sha

ft U

JA34

026

HVA

C S

haft

UJA

4100

3 JE

A10

(SG

) Roo

m

UJA

4100

4 JE

A20

(SG

) Roo

m

UJA

4100

7 JE

A30

(SG

) Roo

m

UJA

4100

8 JE

A40

(SG

) Roo

m

UJA

4101

3 Se

tdow

n Ar

ea, O

pera

ting

floor

U

JA41

014

Annu

lar A

rea,

240

-0 D

eg

UJA

4101

5 An

nula

r Are

a, 0

-120

Deg

U

JA40

001

Dom

e 16

095.

7764

19.5

364

44.7

764

30.7

663

91.9

664

64.4

366

91.4

5

To

tal

2609

4.59

26

197.

18

2614

0.24

25

982.

50

2627

7.10

27

199.

88

Not

e: T

able

cel

ls c

onta

inin

g no

info

rmat

ion

repr

esen

t roo

ms

with

no

ceilin

gs.

DRAF

TT9.

229.

22

TT21

6.38

215.

9

FFT3030

89.6

5898 FFTFFT AFF

TAFFAAF RAAFRAARAARARA

1609

5.77

1609

5.7

641

641

DRTota

lTo

26

DDDRRRDDDRRRRDo

info

rmat

ion

repr

eso

info

rmat

ion

rep

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

25 o

f 40

Tabl

e 06

.02.

02-7

2-5—

Wat

er R

etai

ned

in S

team

and

Dro

plet

Pha

se

Para

met

er

Dur

ing

Blo

wdo

wn

Dur

ing

Ref

ill/R

eflo

odD

urin

g Po

st

Ref

lood

Ti

me

of P

eak

Con

t. Pr

essu

re

Tim

e of

Pea

k IR

WST

Tem

pTi

me

of H

alf

Peak

Pr

essu

re

Initi

al P

ress

ure

(psi

a)

15.9

6 15

.96

15.9

6 15

.96

15.9

6 15

.96

Initi

al T

empe

ratu

re °F

(°R

) 86

(546

)86

(546

)86

(546

)86

(546

)86

(546

)86

(546

)Ti

me

(s)

29.1

8 60

.09

600.

10

3,60

0.11

12

304.

73

4012

2.71

Con

tain

men

t Pre

ssur

e,

(psi

a)

66.3

763

.44

65.1

569

.27

61.6

341

.97

Con

tain

men

t Sat

urat

ion

Tem

p, °F

(°R

) 25

7 (7

16)

259

(719

)27

5 (7

35)

279

(739

)26

9 (7

29)

232

(692

)

Con

tain

men

t Fre

e Vo

lum

e (ft

3 ) 2,

827,

498

2,82

7,49

82,

827,

498

2,82

7,49

82,

827,

498

2,82

7,49

8

Vapo

r Par

tial P

ress

ure

(psi

a)

45.4

442

.42

43.6

847

.67

40.3

221

.74

Vapo

r Den

sity

(lbm

/ft³)

0.10

730.

1006

0.10

340.

1122

0.09

590.

0538

Tota

l Ste

am M

ass

(lbm

) 30

3,39

128

4,44

629

2,36

331

7,24

527

1,15

715

2,11

9To

tal D

ropl

et M

ass

(lbm

) 39

,208

2,82

724

881

336

Tota

l Ste

am a

nd D

ropl

et

Mas

s (lb

m)

342,

599

287,

273

292,

611

317,

326

271,

190

152,

125

DRAF

TT0 0

3, TT5.

155.

156 TTTFT

275

(735

)27

5 (

279

(727

9 FTFTFTFT2,

827,

498

2,82

7,49

82 FTFTFT AF

T2.

42.42

43.6

843

.68 AAAFFFAF

0.10

06060.

1034

0.10

34 AAAFFA28

4,44

6629

2,36

292,

36 AAARA2,82

72 RARARARA

928

7,27

328

7,27

3 RARARARRRRRARR

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

26 o

f 40

Tabl

e 06

.02.

02-7

2-6—

Dep

th o

f Ret

aine

d W

ater

in A

nnul

ar R

egio

n

Para

met

er

Dur

ing

Blo

wdo

wn

Dur

ing

Ref

ill/R

eflo

odD

urin

g Po

st

Ref

lood

Ti

me

of P

eak

Con

t. Pr

essu

re

Tim

e of

Pea

k IR

WST

Tem

pTi

me

of H

alf

Peak

Pr

essu

re

Tim

e (s

) 29

.182

1260

.093

5260

0.10

3536

00.1

112

304.

7340

122.

71To

tal C

onde

nsat

e M

ass

(lbm

) 13

243.

2424

433.

6389

316.

4021

6150

.85

3924

31.2

160

6627

.63

Con

dens

atio

n R

ate

(lbm

/s)

446.

7930

8.17

70.1

533

.17

15.7

44.

65To

tal C

onde

nsat

e Vo

lum

e (ft

³) 23

1.00

425.

5215

56.8

537

76.2

268

26.0

810

416.

00C

onde

nsat

e Vo

lum

etric

Flo

w

(ft³/s

) 7.

795.

371.

220.

580.

270.

08W

eir H

eigh

t (ft)

0.

333

0.33

30.

333

0.33

30.

333

0.33

3W

eir W

idth

(ft)

20.0

020

.00

20.0

020

.00

20.0

020

.00

Cal

cula

ted

Dyn

amic

Hea

d (ft

) 0.

229

0.18

10.

069

0.04

20.

025

0.01

1Ar

ea o

f Low

er A

nnul

ar R

oom

s (ft

²) 84

07.3

684

07.3

684

07.3

684

07.3

684

07.3

684

07.3

6D

epth

of W

ater

(ft)

0.02

70.

051

0.18

50.

376

0.35

80.

345

DRAF

TTT1515

TTTT6.

856.

8537 TTTT

1.22

TTTFT0.

333

333 FTFTFTFT

20.0

020

.0 FTFTFT AFT

810.

069

0 AAAFFFAF84

07.3

67.

3684

07.3

684

07.3

6 AAAFFFAF0.

05151

0.1

0.1 AAARARARARA

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

27 o

f 40

Tabl

e 06

.02.

02-7

2-7—

Ret

aine

d W

ater

Dep

th o

n H

eavy

Flo

or

Para

met

er

Dur

ing

Blo

wdo

wn

Dur

ing

Ref

ill/R

eflo

odD

urin

g Po

st

Ref

lood

Ti

me

of P

eak

Con

t. Pr

essu

re

Tim

e of

Pea

k IR

WST

Tem

p Ti

me

of H

alf

Peak

Pr

essu

re

Tim

e (s

) 29

.182

1260

.093

5260

0.10

3536

00.1

112

304.

7340

122.

71Pr

essu

re in

Con

trol V

olum

e 10

, PR

10 (p

sia)

66

.45

63.4

965

.22

69.3

361

.68

42.0

2Li

quid

Den

sity

(lbm

/ft³)

57.3

357

.42

57.3

757

.24

57.4

958

.23

Tota

l Con

dens

ate

(lbm

) 60

76.4

211

210.

9340

981.

2199

176.

8918

0059

.94

2783

40.0

7C

onde

nsat

ion

Rat

e (lb

m/s

) 20

5.00

141.

4032

.19

15.2

27.

222.

13Av

erag

e Br

eak

Efflu

ent

Enth

alpy

, hav

e (Bt

u/lb

m)

339.

0325

6.73

613.

270.

000.

000.

00Ev

apor

atio

n En

thal

py, h

fg(B

tu/lb

m)

910.

8191

3.04

911.

7390

8.71

914.

4493

1.75

Satu

rate

d Li

quid

Ent

halp

y, h

f (B

tu/lb

m)

269.

2526

6.13

267.

9627

2.18

264.

1723

9.26

Brea

k Ef

fluen

t Qua

lity,

X

= (h

ave-

hf)/

hfg

0.08

-0.0

10.

380.

000.

000.

00Br

eak

Mas

s Fl

ow, M

b (lb

m/s

) 93

12.6

755

65.3

025

4.58

0.00

0.00

0.00

Liqu

id B

reak

Mas

s Fl

ow

(lbm

/s)

= M

b·(1-

X)

8599

.17

5565

.30

158.

160.

000.

000.

00Sa

fety

Inje

ctio

n M

ass

Flow

(lb

m/s

) 0.

000.

000.

0022

3.95

624.

7362

7.23

Tota

l Flo

w o

nto

Hea

vy F

loor

(lb

m/s

) 88

04.1

757

06.7

019

0.35

239.

1763

1.95

629.

37To

tal V

olum

etric

Flo

w (f

t³/s)

15

3.57

99.3

93.

324.

1810

.99

10.8

1W

eir H

eigh

t (ft)

0.

1667

0.16

670.

1667

0.16

670.

1667

0.16

67W

eir W

idth

(ft)

66.3

66.3

66.3

66.3

66.3

66.3

Dyn

amic

Hea

d H

eigh

t (ft)

0.

6188

0.48

510.

0599

0.06

960.

1290

0.12

76R

etai

ned

Wat

er D

epth

(ft)

0.78

550.

6518

0.22

660.

2363

0.29

570.

2943

DRAF

T2222

TT7.

377.

3757 TTTFT

0981

.21

0981

9917

6.8

99 FTFTFTFT32

.199

1

FTFTFTFT61

3.27

613.

2 FTFTFT AFT

13.0

40491

1.73

11.7

3 AAAFFFAF26

6.13

2626

77 AAAF RA-0.01-0 RARARARRA67

5565

.30

5565

.30 RRRARARA DRRA

8599

.17

8599

.17

5565

.355 DRDRDRDRRDRR

0.00

DRDRDRDR4.

174.

17

DDDDD77DDDD

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

28 o

f 40

Tabl

e 06

.02.

02-7

2-8—

Dep

th o

f Wat

er b

ehin

d D

oors

and

Cur

bs

Dep

th o

f Ret

aine

d W

ater

(ft)

at T

ime

Roo

m

Floo

r Are

a (ft

²) 29

s

60 s

60

0 s

3600

s

1230

4 s

4012

2 s

UJA

0400

5 10

3.33

0.05

250

0.09

671

0.35

383

0.85

823

1.55

138

2.36

728

UJA

0400

6 10

3.33

0.05

046

0.09

294

0.34

005

0.82

480

1.49

096

2.27

507

UJA

0401

2 40

.90

0.09

946

0.18

322

0.67

034

1.62

595

2.93

915

4.48

488

UJA

1101

0 82

.88

0.04

229

0.07

789

0.01

610

0.00

361

0.00

081

0.00

007

UJA

1501

1 18

8.37

0.03

147

0.05

797

0.04

605

0.01

034

0.00

231

0.00

020

UJA

1502

0 21

9.58

0.01

132

0.02

085

0.00

810

0.00

182

0.00

041

0.00

003

UJA

2902

5 38

.75

0.02

406

0.04

432

0.16

213

0.39

326

0.71

088

1.08

475

UJA

2902

6 38

.75

0.02

406

0.04

432

0.16

213

0.39

326

0.71

088

1.08

475

UJA

3401

8 70

5.04

0.00

325

0.00

598

0.02

188

0.05

306

0.09

592

0.14

636

DRAF

T05

98

FT0.

1621

30

0.39

0.3 FT44

TTT61

061

00 TTTT

0460

504

605

0.01 TTTT

0.00

810

0.0

0.00

18 TTTFTFTFTFTFFT22

0.16

213

162

0.0 FFFTFTFTFFT0.

0218

80.

02 FFFTFTFT AFAFAFAFFTFF

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

29 o

f 40

Tabl

e 06

.02.

02-7

2-9—

Tota

l Mas

s of

Wat

er R

etai

ned

on F

loor

s

Ret

aine

d W

ater

on

Hea

vy F

loor

D

urin

g B

low

dow

n D

urin

g R

efill

/Ref

lood

D

urin

g Po

st

Ref

lood

Ti

me

of P

eak

Con

t. Pr

essu

reTi

me

of P

eak

IRW

ST T

emp

Tim

e of

Hal

f Pe

ak P

ress

ure

Pres

sure

, (ps

ia)

66.4

5 63

.49

65.2

2 69

.33

61.6

8 42

.02

Liqu

id D

ensi

ty (l

bm/ft

³) 57

.33

57.4

2 57

.37

57.2

4 57

.49

58.2

3 R

oom

N

ame

Floo

r Are

a (ft

²) M

ass

@ 2

9sM

ass

@ 6

0s

Mas

s @

60

0s

Mas

s @

3,6

00s

Mas

s @

12

,307

s M

ass

@ 4

0,12

2s

UJA

1100

2 71

0.5

31,9

9526

,592

9,23

89,

609

12,0

7712

,177

UJA

1100

3 73

7.4

33,2

0727

,599

9,58

89,

972

12,5

3412

,638

UJA

1100

4 73

7.4

33,2

0727

,599

9,58

89,

972

12,5

3412

,638

UJA

1100

5 62

8.7

28,3

1223

,530

8,17

48,

502

10,6

8610

,775

UJA

1100

6 61

7.9

27,8

2523

,126

8,03

48,

356

10,5

0310

,590

UJA

1100

7 73

7.4

33,2

0727

,599

9,58

89,

972

12,5

3412

,638

UJA

1100

8 73

7.4

33,2

0727

,599

9,58

89,

972

12,5

3412

,638

UJA

1100

9 77

2.9

34,8

0528

,927

10,0

4910

,452

13,1

3713

,246

UJA

1101

8 64

1.6

28,8

9324

,013

8,34

28,

677

10,9

0610

,996

UJA

1101

9 47

2.6

21,2

8217

,688

6,14

56,

391

8,03

38,

100

Subt

otal

(lbm

)30

5,94

025

4,27

288

,332

91,8

7711

5,47

811

6,43

6R

etai

ned

Wat

er in

the

Ann

ular

Are

a D

urin

g B

low

dow

n D

urin

g R

efill

/Ref

lood

D

urin

g Po

st

Ref

lood

Ti

me

of P

eak

Con

t. Pr

essu

reTi

me

of P

eak

IRW

ST T

emp

Tim

e of

Hal

f Pe

ak P

ress

ure

Liqu

id D

ensi

ty (l

bm/ft

³) 57

.33

57.4

257

.37

57.2

457

.49

58.2

4D

epth

of W

ater

(ft)

0.02

70.

051

0.18

50.

376

0.35

80.

345

Roo

m

Nam

e Fl

oor A

rea

(ft²)

Mas

s @

29s

Mas

s @

60s

M

ass

@

600s

M

ass

@ 3

,600

sM

ass

@

12,3

07s

Mas

s @

40,

122s

Low

er A

nnul

ar R

oom

s w

ith W

eir

UJA

0701

3 11

14.1

1,75

53,

238

11,8

3623

,960

22,9

4622

,366

UJA

0701

4 20

543,

235

5,96

921

,821

44,1

7342

,304

41,2

36U

JA07

015

2090

.63,

293

6,07

622

,210

44,9

6043

,057

41,9

71U

JA07

016

2090

.63,

293

6,07

622

,210

44,9

6043

,057

41,9

71U

JA07

018

1058

.11,

667

3,07

511

,241

22,7

5521

,792

21,2

42

DRAF

T9.

339.

3357

.24

57.2

Mas

s @

3,

Mas

TFT9,

238

9,23

9,60

FTFTFTFT9,

588

99

FT9,

58888 FT

8,17

48,

174 AF

T2626

8,03

48,

03 AF,5

99999,

588

588 AF

27,5

9999,

588

9,58

8

RAF

28,9

2728

10,0

40

04

RA24,0

1324

,08

RA17,6887,6 RA254,272254,272 RARARA DRA

Ret

aine

d W

ater

inta

ined

Wat

er in

DDDRRRng

ng

do

wn

dow

Dur

ing

urin

gR

efill

/Ref

loo

Ref

ill/R

eflo DDDRDD

57.3

357

.5 DDDRD

0.02

70.

027

D9s9s

Mas

Mas DDDDDD

AR

EV

A N

P In

c.

Res

pons

e to

Req

uest

for A

dditi

onal

Info

rmat

ion

No.

434

, Sup

plem

ent 2

U

.S. E

PR

Des

ign

Cer

tific

atio

n A

pplic

atio

n P

age

30 o

f 40

Oth

er A

nnul

ar R

oom

s w

ith a

Con

stan

t Uni

form

Dep

th o

f ½ in

ch

UJA

1102

0 10

33.4

2,48

82,

492

2,49

02,

484

2,49

52,

528

UJA

1501

3 14

86.6

3,58

03,

585

3,58

23,

574

3,59

03,

636

UJA

1501

4 15

50.2

3,73

33,

739

3,73

53,

727

3,74

33,

792

UJA

1501

5 16

50.3

3,97

43,

980

3,97

63,

967

3,98

54,

037

UJA

1501

6 18

94.6

4,56

24,

569

4,56

54,

555

4,57

54,

634

UJA

2901

3 44

24.3

10,6

5310

,670

10,6

6110

,636

10,6

8310

,822

UJA

2901

4 20

264,

878

4,88

64,

882

4,87

14,

892

4,95

6U

JA29

015

1152

.92,

776

2,78

02,

778

2,77

22,

784

2,82

0U

JA29

016

3217

.77,

748

7,76

07,

753

7,73

67,

769

7,87

1U

JA29

018

659.

91,

589

1,59

11,

590

1,58

61,

593

1,61

4U

JA29

022

627.

61,

511

1,51

41,

512

1,50

91,

515

1,53

5U

JA29

023

587.

81,

415

1,41

81,

416

1,41

31,

419

1,43

8U

JA34

014

964.

52,

322

2,32

62,

324

2,31

92,

329

2,35

9U

JA34

015

2292

.95,

521

5,53

05,

525

5,51

25,

536

5,60

9U

JA11

013

1556

.63,

748

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AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 33 of 40

Question 06.02.02-73:

ANP-10293 Rev. 1 Figures E.6-2, E.6-4 includes a note indicating basket head change due to flume water evaporation. Given that testing employed water level management controls (make-up and letdown); it is not clear why evaporation was a factor. Explain the reasons behind AREVAs conclusion that the head loss change was related to evaporation and not other causes. In the response, include any other test impacts or test observations associated with evaporation.

Response to Question 06.02.02-73:

The note indicating basket head change due to flume water evaporation was intended to explain the increase in measured retaining basket head loss between hours 33.9 and 37.4 during the Design Basis Debris Loaded Strainer Head Loss Test (Test 2) and hours 14.1 and 23.7 during the Thin Bed Test (Test 4). ANP-10293, Revision 1 shows the measured increases graphed in Figures E.6-2 and E.6-4 for Test 2 and Test 4, respectively.

The water management system consisted of two parts; water removal and water addition. As wetted debris was added to the flume, the volume of water within the flume increased. To maintain the prototypical strainer submergence, an overflow weir removed excess water from the flume.

The water addition system used a makeup water tank to add water to the test flume as required. As debris was inserted into the retaining basket, a debris bed formed on the retaining basket screen. This debris bed caused the water level in the retaining basket to increase above the water level downstream of the basket (surrounding the strainer). The water volume increase within the retaining basket reduced the water volume downstream of the retaining basket. As the volume of water downstream of the retaining basket decreased below prototypical levels, power was applied to the makeup water pump to add water to the flume downstream of the retaining basket.

Debris plugged the entire retaining basket screen during Test 2 and Test 4 creating an overflow condition within the retaining basket. The water addition system performed adequately during the debris addition portions of the test. After overflow, debris addition (and associated water volume) continued until all required debris constituents were applied to the flume and water addition was no longer necessary. The additional volume of debris laden water increased the water level to the prototypical strainer submergence level (at the overflow weir). The measured differential pressure (elevation head) across the retaining basket after the last debris addition to the test flume was approximately 7.3 feet during Test 2 and Test 4.

After all debris was added to the flume, the flume water was recirculated to observe changes in the measured strainer head loss created by debris addition until test termination criterion was met. During this period of approximately 3.5 hours, the 120°F water began to evaporate to the environment outside of the test flume. Because the water recirculates into the plugged retaining basket, the volume of water in the retaining basket remained unchanged. However, the volume of water downstream of the retaining basket began to slowly decrease. The measured head loss of the retaining basket 3.5 hours after all debris was inserted into the flume was approximately 7.4 feet for both Test 2 and Test 4. The increase in measured differential pressure across the retaining basket from approximately 7.3 feet to approximately 7.4 feet was not created by water increase within the retaining basket because the basket was already in an

DRAFT

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AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 34 of 40

overflow condition. The increase in measured differential pressure across the retaining basket was created by the change in measured elevation head as the water in the vicinity of the strainer decreased by approximately 0.1 feet within the 3.5 hour period. Test 4 was continued 9.6 hours (overnight) after all debris was added to the test flume and the water addition system disabled after the basket overflow condition was reached. The final measured retaining basket head loss was approximately 7.7 feet due to evaporation; this was visually confirmed by the water level decrease in the vicinity of the test strainer. The decrease in strainer submergence was conservative and evaporation was not a factor to the test conclusions, merely an observation of the data.

FSAR Impact

The U.S. EPR FSAR will not be changed as a result of this question.

DRAFT

oo

AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 35 of 40

Question 06.02.02-74:

The U.S. EPR debris generation analysis uses a 2.4D zone-of-influence (ZOI) for assessing the amount of fiber insulation generated during the accident. This ZOI is for steel jacketed Nukon (fiber insulation) with Sure-Hold bands based on NEI 04-07 GR and NRC SE Table 3-2. The 2.4D ZOI was derived from testing for a specific insulation system. Therefore, in order to apply the 2.4D ZOI, the U.S. EPR fiber insulation system, fasteners, and associated components should be of a design that is equivalent or more robust than the tested Sure-Hold system (the BWROGs air jet impact testing is described in Volume 3 of the BWROGs Utility Resolution Guidance). Important design features of the testing include band spacing, pipe diameter, band fasteners, band width, jacket overlap (axial and circumferential), jacket material and thickness, etc. The staff requests that AREVA evaluate if their design specific application of the 2.4D ZOI is bounded by existing testing, with specific consideration given to differences in pipe diameters between the test and U.S. EPR design and minimum radius requirements for the fasteners. For those piping applications that are not bounded, the staff request that AREVA provide additional analysis or ITAAC to support the debris generation analysis (fiber insulation source term derived by application of a 2.4D ZOI). In addition, to assess the sensitivity of the U.S. EPR source term to the ZOI size, assuming that the 2.4D ZOI was increased to 17D (as listed in the NRC SE value corresponding to unjacketed Nukon or jacketed Nukon with standard bands), estimate how much additional fibrous insulation debris would be generated using break locations listed in ANP-10293 Rev. 1 Appendix C.

Response to Question 06.02.02-74:

The U.S. EPR debris generation calculation was revised to modify the debris source term. The revision changed the insulation of piping less than four inches in diameter from NUKON® jacketed with Sure-Hold® bands to Reflective Metal Insulation (RMI). The U.S. EPR design no longer incorporates NUKON® insulation on piping subject to loss of coolant accident (LOCA) jet blast effects. This change will be incorporated into Revision 3 of Technical Report ANP-10293, “U.S. EPR™ Design Features to Address GSI-191,” which is scheduled to be submitted by March 31, 2011.

FSAR Impact

The U.S. EPR FSAR will not be changed as a result of this question. DRAFT

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AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 36 of 40

Question 06.02.02-76:

Follow-up to RAI 111, Question 06.02.02-8:

In the Supplement 10 response to RAI 111, Question -6.02.02-8K6, AREVA indicated that fluid from a pressurizer surge line break reaches the pressurizer relief tank (PRT) room and is released through a door separating the PRT room and steam generator blowdown (SGBD) room. Flooding berms, associated with SGBD room doors and doorways, are mentioned as design features that prevent flooding of the annular space and serve to contain the fluids within the SGBD and PRT rooms. Also, wall openings are provided at four locations to route fluid out of the SGBD room and into the loop areas of the heavy floor.

Given that four openings are now provided to connect the SGBD room to the loop area heavy floor, describe the impact during a large break LOCA where fluid spills onto the loop area heavy floor. Will fluid from a break in the loop area flood the SGBD and PRT rooms? How is this volume considered in the water hold-up analysis? Describe the design of the four SGBD room wall openings and any devices installed at the opening that are required to actuate to permit/block fluid flow to/fm the loop area of the heavy floor through these openings. Also, describe how floor openings, wall openings, berms and doors permit fluid and debris, generated during a break near the pressurizer, to flow into and out of the PRT room and SGBD room (include assessment of break selection, debris generation, debris transport and upstream effects (water hold up or choke points) and provide details of debris types and quantities evaluated). In addition, provide a simple figure or discussion about where and how water is held up and how high a level is reached in the PRT and SGBD rooms in response to a pressurizer surge line break and a break in the loop area. Discuss height of curbs, openings, and flooding berms, and how doors are used to either release or contain water. A discussion of these important design features to address GSI-191 is expected to be included in technical report ANP-10293 or an appropriate FSAR Section.

Response to Question 06.02.02-76:

Wall openings are provided in the SGBD room walls at four locations, two in each wall to route the surge line break fluid out of the SGBD tank room and onto the heavy floor. During a large break loss of coolant accident (LBLOCA), water may flow from the heavy floor into the SGBD and PRT rooms. In the water retention analysis the SGBD and PRT rooms (UJA11018 and UJA11019) are considered to be flooded at the same depth as the heavy floor.

The four openings between the SGBD and PRT rooms and the loop areas are free openings (0.618ft² each). The minimum opening height from the floor for each 0.618 ft² opening is approximately 1.05 ft. There are no devices contained in the openings, therefore, bidirectional flow is allowable. A 20 inch (1.67 ft) high berm around the SGBD system tank will prevent flooding into the compartment below from occurring. The two doors leading into the annular regions from room UJA11018 will also contain a flooding berm of at least 20 inches (1.67 ft) high to preclude flooding into the annular area.

Debris generation is limited to reflective metallic insulation (RMI) and latent debris. There is no fibrous insulation used in the zones of influence in the containment of the U.S. EPR design. The maximum level of flooding on the heavy floor and the floors of the SGBD and PRT rooms in the water retention analysis is 0.7855 ft, which occurs during blowdown of a

DRAFT

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AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 37 of 40

LBLOCA. The flooding level for a pressurizer surge line break was not evaluated as the LBLOCA, which is more limiting for water retention. The maximum level of water retention (0.7855 ft) is lower than the level of berms (1.67 ft); thus, no water will flood out to the annular space or to the room below the SGBD tank room. Operation of the doors in the SGBD tank room is also not needed to release or contain the water level as the flooding level 0.7855 ft from the LBLOCA is below the 1.67 ft height of the berms at each door. Additional information on the wall openings will be provided in Revision 3 of Technical Report ANP-10293, “U.S. EPR™ Design Features to Address GSI-191,” which is scheduled to be submitted by March 31, 2011.

FSAR Impact:

The U.S. EPR FSAR will not be changed as a result of this question. stion.stion

AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 38 of 40

Question 06.02.02-78:

Provide the density of latent particulate material and justify its selection in comparison with guidance

Response to Question 06.02.02-78:

The U.S. EPR strainer testing used latent particulate debris prepared by Performance Contracting Incorporated (PCI). PCI formulated their surrogate based on guidance provided by NEI 04-07, Volume 2 and NUREG/CR-6877. Section 3.5.2.3 in Volume 1 of NEI 04-07 recommends the use of 10 µm diameter grains as the debris characteristic for latent particulate debris. Volume 2 of NEI 04-07 considers the 10 µm diameter assumption as conservative and provides additional guidance in Appendix V to determine appropriate parameters for a mix of multiple fiber and particulate components. Section V.2.2 in Volume 2 of NEI 04-07 states that “plant debris characteristics pertinent to the specification of a recipe to create a suitable latent particulate surrogate include specific gravity and particulate-size distribution.” Section V.2.2 also states that debris characteristics were determined by the Los Alamos National Laboratory (LANL) report LA-UR-04-3970 2004a, which was published in July 2005 as NUREG/CR-6877.

NUREG/CR-6877 analyzed latent samples of five volunteer pressurized water reactor (PWR) plants and included the properties of material composition and hydraulic flow properties. These characteristic properties were analyzed by LANL and provided a surrogate latent particulate debris recipe for use in head-loss testing performed at the University of New Mexico (UNM). NUREG/CR-6877 guidance for surrogate latent particulate mass distribution was: 27.7 percent of debris between 500 µm and 2 mm, 35.2 percent of debris between 75 µm and 500 µm, and 37.1 percent less than 75 µm. Though some of the volunteer plant debris included materials larger than 2 mm, NUREG/CR-6877 removed this constituent and renormalized the distribution amongst the smaller particulates because visual inspection showed that material larger than 2 mm had very limited transport potential. The surrogate latent particulate distribution is again captured in Table V-2 in Volume 2 of NEI 04-07. The PCI latent particulate debris distribution used for testing was: approximately 27.3 percent of debris between 500 µm and 2 mm, approximately 35.3 percent of debris between 75 µm and 500 µm, and approximately 37.4 percent less than 75 µm as specified in PCI’s proprietary technical document, “Sure Flow Suction Strainer - Testing Debris Preparation and Surrogates” (ADAMS Accession No. ML090900476).

Page 3-37 in Volume 1 of NEI 04-07 recommends 100 lbm/ft3 as the particle density for latent particulate debris. This density was derived by the densities of “Earth,” dry and packed and “Sand.” Page 51 in Volume 2 of NEI 04-07 provides guidance to “assume that latent particulates are primarily geophysical in origin being composed of soil, sand, and dust.” Volume 2 of NEI 04-07 provides additional guidance to assume that latent particulate material has a nominal density of 2.7 g/cm3 (169 lbm/ft3). Page V-8 references the debris characteristic data provided by LANL as “well represented” with the specific gravity of 2.7 g/cm3 (an equivalent density of 169 lbm/ft3). Finally, bullet 8 on page V-11 in Volume 2 of NEI 04-07 summarizes particulate density by recommending 100 lb/ ft3 for the material density of latent particulate debris because this is conservative relative to the heavier densities (169 lbm/ft3) referenced in the LA-UR-04-3970 document. Actual plant analysis of particulate density was performed by LANL and documented in NUREG/CR-6877. The results of the LANL analyses showed that the particulate ranged in densities from 1.5 to 4.0 g/cm3 (93.6 to 249.7 lbm/ft3) with the median density of 2.7 g/cm3 (169 lbm/ft3). It is noted that the LANL data showed that the average

DRAFT

ume 2umea recipe to ca reci

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AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 39 of 40

densities varied depending on debris size with the smaller debris being the densest and the largest debris being the least dense. NUREG/CR-6877 also determined that bulk densities of the latent particulate debris varied depending on the size distribution from 39 to 104 lbm/ft3specifying that the particulate recipe provided an approximate density between 63 to 75 lbm/ft3.

PCI provided the U.S. EPR test with a dirt and dust mix based on a size distribution that is similar to that provided by the guidance within NUREG/CR-6877. The density of the dirt and dust is related to the packing factor. Dirt and dust densities will vary; therefore, the size distribution and mass of tested surrogate dirt and dust are more justifiable for use during strainer qualification testing.

FSAR Impact:

The U.S. EPR FSAR will not be changed as a result of this question.

DRAFT

estion. estion

AREVA NP Inc.

Response to Request for Additional Information No. 434, Supplement 2 U.S. EPR Design Certification Application Page 40 of 40

Question 06.02.02-79:

The retaining basket and strainer head loss testing for US EPR was designed to assess debris accumulation on the basket and strainer screens. During the July 2010 strainer test, after all the non-chemical particulate and fiber was added, the staff noted a potentially significant floating layer of fibrous debris, covering a large portion of the test tanks water surface. The staff was surprised by the amount of floating fibrous debris in the test. Based on observation, it appears that air bubbles generated by the impingement of the recirculation system jet and entrained in the water flow were interacting directly with debris to create floating masses.

The staff also noted that the test protocol and scaling were intended to conservatively or prototypically represent the fluid dynamic conditions at the screen and basket faces. The phenomena that are pertinent to debris floating do not appear to have been scaled conservatively or prototypically. For example, the test temperature was lower than in the plant, the debris concentrations were higher than in the plant, and the distances between the screens and the impingement of the recirculation jet were generally much shorter.

Therefore, the staff requests AREVA to evaluate the impact on strainer head loss if the floating fibrous debris had transported/accumulated on the strainer and address the following questions:

What are the principal phenomena that would contribute to debris floating? Were these phenomena modeled conservatively or prototypically in the test? Explain why it is acceptable for the test to permit floating as a debris removal mechanism given how the principal phenomena were scaled.

Response to Question 06.02.02-79:

The U.S. EPR test apparatus used several conservatisms to challenge the strainer design with regards to head loss. Throughout testing it has been observed that air bubbles generated by the impingement of the recirculation system jet entrain air into the flow of water. As the flow moves towards the strainer, tiny bubbles work their way to the surface, sometimes collecting fiber along the way. This is visually confirmed by the fact that fiber preparation removes air, yet there is air entrained within the fiber downstream of the retaining basket.

Air bubbles generated by the impingement of break flow from the heavy floor to the in-containment refueling water storage tank (IRWST) are prototypical; however, the flow towards the strainer was scaled slightly greater than plant conditions to enhance debris transport and prevent settling. To remedy any non-prototypical floating debris, floating debris will be documented with photographs, carefully removed with a filtering skimmer from the surface, and re-introduced into the test apparatus at an area downstream of the retaining basket. This process will be followed during future head-loss testing, and will be performed with extreme care to prevent any disturbances to strainer debris beds.

FSAR Impact:

The U.S. EPR FSAR will not be changed as a result of this question.

DRAFT

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