Be-7 and Pb-210 wet/dry deposition in Melbourne, Australia and the development of deployable units for radiological emergency monitoring

摘要

A large stainless-steel collection tray (with a surface area of one square metre) was purpose built and mounted on the roof of the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) building at Yallambie, Victoria, Australia. Using this system two years' worth of wet/dry deposition samples have been collected and analysed. Smaller portable units were also developed for deployment in an emergency and/or for environmental monitoring. The cosmogenic radionuclide Be-7 and the naturally occurring terrestrial radionuclide Pb-210 have been used to validate the systems. The data from the smaller units was successfully compared to the larger permanent collection unit for validation, thus finding the portable units fit for purpose.