INTERCOMPARISON OF MEASUREMENT TECHNIQUES USED IN RADON EXPOSURE FACILITIES FOR ANIMALS IN EUROPE

The biological effects of exposure to radon and its progeny are being studied in animals by three laboratories in Europe. The facilities use d for such exposures are described, together with the methods used to estimate radon progeny concentrations and the activity deposited in th e lungs of exposed animals. As the facilities and methods vary, a seri es of comparison exercises has been carried out at the three facilitie s; CEA/COGEMA, Razes, France, TNO, Rijswijk, The Netherlands and AEA T echnology, Harwell, U.K. The results of the exercise are presented tog ether with reasons for the discrepancies in results between the groups thus ensuring that estimates of exposure provided by the groups for t heir studies is directly comparable.