Canadian national internal dosimetry performance testing programme: results of the pilot programme
National Internal Radiation Assessment Section, Radiation Protection Bureau, 775 Brookfield Road, PL6302D, Ottawa, ON, Canada K1A 1C1
* Corresponding author: gary_h_kramer{at}hc-sc.gc.ca
Received January 7, 2009, amended April 16, 2009, accepted April 25, 2009
This paper describes the design and construction of a new performance testing programme that was implemented in Canada in 2008. The Canadian Regulator (Canadian Nuclear Safety Commission) had determined that their licensees, in addition to participating in the existing in vivo and in vitro performance tests, needed to demonstrate their ability in interpreting bioassay results to obtain intakes and resulting doses. The new programme is administered by the Canadian National Calibration Reference Center for Bioassay and In Vivo Monitoring (NCRC). Currently, the NCRC carries out the performance testing for the in vitro and in vivo. At the time of writing, the first round has been completed and the results for 3H and natU exposures were very consistent, while the committed effective dose from 137Cs intake varied by a factor of two.