International intercomparison exercise of active radon devices and passive detectors at the First East European Radon Symposium (FERAS 2012)

摘要

During the First East European Radon Symposium (2012), an Intercomparison Exercise of active devices and passive detectors was organized, at two exposure levels. Medium Radon Exposure was made in the laboratory room at low to medium level by an average radon concentration of hundreds of Bq·m-3 and involved 12 active devices and 8 groups of passive detectors. High Radon Exposure was performed in a calibration chamber at high level by an average radon concentration of thousands of Bq·m-3 and involved 5 active devices and 7 groups of passive detectors. Results of active devices show that mean concentrations of 11 devices from the Medium Exposure and 1 device from High Exposure were inside ± 95% C.I of the means. Results of passive detectors show that the exposure values of 4 groups from the Medium Exposure and 6 groups from the High Exposure were inside ± 20 % admittance level of the reference exposure.