Proposal of RP Control Area adapted to the evacuation campaign of radioactive waste from CERN radioactive storageYann PIRA, Chris THEIS, Kurt WEISS

19/05/15, ATS-RC-WG

Requirements

• Proximity of the radioactive storages : ALARA, Minimize distances and time spent for transport,

• Proximity of the daily actors : GS, RP,

• A place with the lowest radioactive background,

• A closed, safe area, and sheltered from bad weather conditions,

• Wifi or internet access for TREC registeration,

Proposal : Shelter 951

Proposal : Shelter 951

• Sheltered place.

• Closed area.

• Concrete slab : easy to develop (steel plate on groundfloor, concrete shielding blocks).

Proposal : Shelter 951

• Available space of about 100m2 by removing 10 electrical transformers.

Proposal : Shelter 951

• Low and relatively stable radiation background measured on the groundfloor : 13/05/15 : between 20 to 30 c/s with BGO probe (sunny weather

condition + MD : no beams in north arera). 18/05/15 : between 25 to 35 c/s with BGO probe (sunny weather

condition + Proton beam in north area).

• Good measurement conditions for RP.

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Com

ptag

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Comptage du Bdf BGO en [c/s]

Seuil de décision et Limite de détection BGO : tmes = tBdf = 20 sec

Seuil de décision [c/s]

Limite de détection [c/s]

Proposal Shelter 951 : conclusion

Pros :

• Proximity of the radioactive storages : ALARA, Minimize distances and time spent for transport,

• Proximity of the daily actors : GS, RP,

• Low and relatively stable radioactive background,

• Partially sheltered and close area.

Cons :

• Removal of a certain number of items stored at this place.

To be improved :

• Improve the sheltering of the area (protective wall, additionnal tent?),

• Improve RP measuring conditions (additional shielding : shielding blocks, steel plates on the floor)

• Wifi/Internet for TREC works