Radiological Contamination Assessment of Building 63, DRDC Valcartier

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Authors
  1. Estan, D.
  2. Haslip, D.S.
  3. Buhr, R.
  4. Hoffarth, B.E.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
Director General Nuclear Safety (DGNS) contracted DRDC Ottawa’s Radiological Analysis and Defence Group to aid in a contamination assessment of DRDC Valcartier’s building 63. Prior investigations have been completed however not to DGNS’s satisfaction. The nature of the contamination was suspected to be depleted uranium (DU), based on DRDC Valcartier’s history of working with and machining DU. The highest level of surface contamination found in a finished room was 0.8 Bq/cm2 (only 0.3 Bq/cm2 above the DGNS regulatory limit of 0.5 Bq/cm2 for fixed contamination). The areas exhibiting the most contamination were found to be old drainpipes. This included a surface contamination measurement of 7 Bq/cm2 beneath an old drainpipe in a mechanical room that generally speaking is inaccessible to staff. The composition of the contamination in the pipes was confirmed to be depleted uranium.

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Keywords
Radiological contamination assessment;Depleted uranium;DU;High Purity Germanium (HPGe) detector
Report Number
DRDC-OTTAWA-TM-2004-078 — Technical Memorandum
Date of publication
01 May 2004
Number of Pages
70
DSTKIM No
CA024313
CANDIS No
521839
Format(s):
Hardcopy;CD ROM

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