J.Pothier CERN EP/CMIC.Schäfer CERN EP/L3D. J.Pothier CERN EP/CMIC.Schäfer CERN EP/L3D SAFETY J.Pothier (GLIMOS) C.Schäfer (deputy GLIMOS) DISMANTLING

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)


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


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


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)


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 )


Safety Rules



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



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


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


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


"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


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



Documents

J.Pothier CERN EP/CMIC.Schäfer CERN EP/L3D. J.Pothier CERN EP/CMIC.Schäfer CERN EP/L3D SAFETY J.Pothier (GLIMOS) C.Schäfer (deputy GLIMOS) DISMANTLING