Inventory of radioactive sources present in the cavern at pit 8
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Inventory of radioactive sources present in the cavern at pit 8. Gloria Corti Experimental Area Meeting 05 August 2008. HCAL sources. Hadron CALorimeter uses 2 137 Cs sources for calibration one per half detector gamma sources: nº4145RP (330 MBq) and nº4146RP (300 MBq)

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Inventory of radioactive sources present in the cavern at pit 8

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Inventory of radioactive sources present in the cavern at pit 8

Inventory of radioactive sources present in the cavern at pit 8

Gloria Corti

Experimental Area Meeting

05 August 2008


Hcal sources

HCAL sources

  • Hadron CALorimeter uses 2 137Cs sources for calibration one per half detector

    • gamma sources: nº4145RP (330 MBq) and nº4146RP (300 MBq)

  • Notice at PZ85 and PM85 of presence of sources in UX85-B with map indicating location of garages

    • garage on floor of electronics platform on top of HCAL, source blocked inside

  • UX85-B conventional area when source in garage (≤ 0.5 µSv/h at 40 cm)

  • Gloria Corti


    Hcal sources1

    HCAL sources

    • EDMS 917876: safety manual and operational procedure for scan

    • Calibration scan announced at least 48 hours in advance and notices in PZ85 and PM85

      • take place from 21:00 in the evening to 7:00 in the morning

    • Flashing panels bottom of Calorimeters stairs and top of gantry at exit of source(s)

    • UX85-B is a supervised area during scan for incident if source would stop during scan

    • Measurements confirm UX85-C is not classified

    AD6 HCAL platform

     Maximum dose rate measured = 116 µSv/h Total integrated dose = 1.31 µSv.

    AD6 Cryo area

     Maximum dose rate measured: 0.37 µSv/h Total integrated dose: 0.2 µSv.

    RESPONSIBLE: Rustem Dzhelyadin

    Gloria Corti


    Ot sources

    ROOM DETAILS

    2828/U1-A06

    (6.0 x 4.0 m2)

    2828/U1-A06

    RADIOACTIVE SOURCE

    position when used in the room

    SAFE where the sources

    are stored when not used.

    UX85 - LOCALIZATION OF RADIOACTIVE SOURCES AT 2828/U1-A06

    OT sources

    • OT uses 3 x 90Sr source + 1 55Fe for irradiation and scanning

      • gas quality and chamber response

      • beta sources: no. 4251RP(27 MBq)–4298RP(70MBq)–4299RP(70MBq), X-ray: no. 3398RP (9MBq)

    Sources kept in a safe in a locked room in UX85-A

    Panel on the door

    One beta source used in the room for gas quality with small panel

    Gloria Corti


    Ot sources1

    OT sources

    • EDMS 942795: safety manual and operational procedure for scan on OT frame

    • EDMS in preparation for irradiation on pillar

    • Signs in place before installation of source, 2 OT halves chambers open

    RESPONSIBLE: Antonio Pellegrino

    Gloria Corti


    Muon source

    Muon source

    • MUON uses 1 241Am for gas quality

      • alpha and low energy gamma

    • At the moment in gas building on the surface, will be moved in UX85-A in 2828/U1-A06

    • EMDS 886019: Safety manual and operation procedure

      • kept in a safe, panel when in use

    RESPONSIBLE: Burkhard Schmidt

    Gloria Corti


    Delphi sources

    432 241Am sources (alpha) in HPC module of the Electromagnetic Barrel Calorimeter – Not accessible

    no. 2946RP, 3.2 MBq on 16.10.1987

    Responsible Gloria Corti

    24 55Fe in TPC of Delphi – Not accessible

    2909-2925RP 370 MBq on 03.09.1987

    2929-2934RP, 2936RP, 2.41 MBq on 12.02.2007

    Responsible Philippe Charpentier

    DELPHI sources

    Gloria Corti


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