Dismantling of shielding wall in PSB injection zone

Caterina Bertone - 2/10/2012

Dismantling of shielding wall in PSB injection zone

Preliminary concerns


To be accessed from PSB or from PS


Quantities and weight

• 300 concrete blocks with max weight of 1250kg

• 30 steel beams (1,6mx200x200), with max weith 500kg

• 635 concrete bricks of 18 kg each• Hundreds of steel bricks to close the open

whole


Pure dismantling

• Mounting technique and tools no longer authorised: needs for studies and tooling: 50kCHF

• Consider 1 month for wall removal + time needed to mount and dismount lines to arrive to the wall: ~50kCHF for manpower


From PS

All you see in the phots needs to be removed


From PSWay to go: all to be dismantled


From PS: machines in and blocks out


Summary of evacuation by this way• Dismantling of the whole zone + up to PS machine• Dismantling of 1-2 PS unit to pass into the inside of the

ring and a part of LBS line• Reinforcement of slab under the PS units and along the

path (to be checked) to pass with heavy machines+blocks• Full reinforcement of the slab from evacuation door and

inner side of PS ring at this position• Unknowns about ground situation• Extra long patch and need for handling means (loco +

trailer+forklifts etc)


From PSBAll you see in the phots needs to be removed


From PSB open spaceSlab to be reinforced


From shielding to tremie

Evacuation lane

Cable trays + line toBe removed


And away…


Summary of evacuation by this way

• Dismantling of the whole line up to PBS machine

• Reinforcement of slab under along the path (10 m?) to pass with heavy machines+blocks

• Short patch and limited need for handling means

• More activated zone?


Open questions and short conclusions

• Activation of blocks?• Permanence of operators in ‘hot zones’ like PSB injection

region?• Reinstallation of the wall after CE? • Sol 1 prevent future exchange of magnets in the zone (no

more transport zone), Sol 2 and seem difficult to realise to lift the dump up and keep in place. Sol 4 needs installation of a crane in the vault up to the zone to allow future handling of the 2 lines (from where do we insert the dump?)

Evacuation from PSB side is clearly the preferred choise It is possible and we are waiting more infos from your side

Dismantling of shielding wall in PSB injection zone

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