Post on 27-Dec-2015
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.
20
30
40
50
60
70
80
90
100
110
20 30 40 50 60 70 80 90 100 110
Com
ptag
e br
ut B
GO
en
[c/s
]
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