Post on 02-Jan-2016
J.Pothier CERN EP/CMI C.Schäfer CERN EP/L3D
SAFETYJ.Pothier (GLIMOS)
C.Schäfer (deputy GLIMOS)
DISMANTLINGL. Veillet (technical Coordinator)
P. Petiot (deputy technical Coordinator)
DETECTOR EQUIPMENTJ.J Blaising (Management Board L3)G.Bobbink (Management Board L3)
J.Pothier CERN EP/CMI C.Schäfer CERN EP/L3D
Very Important
Start of Dismantling L3 after purge of gas and electrical safety is assured
in other words:
Don’t dare to put out ANY module or crate!
L3 stays as it is at least until 8.12.2000
J.Pothier CERN EP/CMI C.Schäfer CERN EP/L3D
Work in heigth:
Safety equipment
Work on ground:
Work with machines:
Only specially trained personsUse of approved equipmentTwo persons rule of working
Only specially trained personsOnly during machine hours (8h-12h, 13h-17h)Keep at least 3m away from operational machine
Safety shoes everywhere on point 2Helmet in UX25, U2, U5 (cavern), P5Gloves recommendedTwo persons rule of working
J.Pothier CERN EP/CMI C.Schäfer CERN EP/L3D
Major Riscs
Falling: 42% of all accidents at CERN Personnel Objects
Fire:
Electricity:
During cutting, welding, etc. Don’t store flammable material in UX25, U1, U4 Extinguishers: every second counts…. Fire Brigade: Red Phone, 112, 74444
No amateurs Check electrical safety (no current)
J.Pothier CERN EP/CMI C.Schäfer CERN EP/L3D
Stumbling, trip over28%
Falls from height14%
Manipulations with hands15%
Electricity1%
Machinery manipulation 3%
Unknown3%
Cars21%
Accidentally moving objects2%
Others5%
Welding machines1%
Mechanical tools1%
Hand tools1%
Dangerous chemical products3%
Fork-lift truck1% Fork-lift truck
1%
42%
Main Sources of Accidents CERN/1999
( Source TIS/GS 10/2000 )
J.Pothier CERN EP/CMI C.Schäfer CERN EP/L3D
Access control
Newaccesscontrol:
new card readers no new access cards needed 2 counters: 1 general LEP and 1 local (INB) all readers are connected to central control room new access database (updated after safety course) for L3: access via small lift PX24, 2 two-way readers for LEP : access via large lift PM 25 bringing up of material via lock
J.Pothier CERN EP/CMI C.Schäfer CERN EP/L3D
Fire detection stays operational (except inside support tube)( gas detection will be dismantled by ST/EL
after purging of gas systems (FGSO))
Alarm level 3 test by TIS/GS and the GLIMOS before dismantling
No smoking in dismantling areasEvery flammable material, e.g. wood, has to be brought onto the surface every evening and put into the metal trash bins
Welders or other technicians must use adequate protection equipment against sparks or high temperatures pieces
Fire
J.Pothier CERN EP/CMI C.Schäfer CERN EP/L3D
Check 400 km of cables by ST/EL under control and responsibility by ST/EL and the GLIMOS
Every rack and power output is checked individually for the Normal-, Experiment-, Safety- and UPS circuits
in P1, P2, P3, P4, P5, MCR, U1, U2, U4, U5, UX25 and SG2
Time estimate: 5 days, NO dismantling before!
Temporary power lines and sockets are available
Disconnecting of electrical cables from 1. to 7.12.2000
J.Pothier CERN EP/CMI C.Schäfer CERN EP/L3D
Water/Gas
No rack coolingNo air conditioning
No air extraction in support tubeVentilation of cavern with humid air
Stop of rough water supply (including mixed water) on 4.12.00
Flammable gas purge (13.-30.11.2000)
No flammable gas in SG2
Disconnect N2 tank for inertion
J.Pothier CERN EP/CMI C.Schäfer CERN EP/L3D
"Cosmic" run - Magnet testsCosmic run from 2. to 12.11.2000
Normal run conditionsExcept new access control
No use of PM25 liftSafety shoes and helmet not needed
Magnet cooling test for Alice (13.11. - 30.11.00)
Restricted access to cavernNo working in cavern,U2 and U5
J.Pothier CERN EP/CMI C.Schäfer CERN EP/L3D
Infractions
Persons violating the CERN and L3 safety rules will immediately be denied to have access to point 2
Every action putting other peoples live in danger will
be regarded as professional fault