1 / 7

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. Hadron CALorimeter uses 2 137 Cs sources for calibration one per half detector gamma sources: nº4145RP (330 MBq) and nº4146RP (300 MBq)

guy-pruitt
Télécharger la présentation

Inventory of radioactive sources present in the cavern at pit 8

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Inventory of radioactive sources present in the cavern at pit 8 Gloria Corti Experimental Area Meeting 05 August 2008

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

More Related