Response of TLD and RPL personal dosimeters in a national inter-comparison test program

Background : Different kinds and models of personal dosimeters are used in individual monitoring by workers. Performance tesng as part of approval procedures is carried out to demonstrate that the essenal performance specificaons are rounely maintained. There are fou r service providers in Iran which use different luminescence techniques (i. e. TLD and RPL) with various kinds of dosimeter materials/reader instruments in personal dosimetry services. Materials and Methods : A naonal performance approval tests program was performed for the dosimeters of the service providers in energy range of so', 660 keV and 1.25 MeV, at the d oses values around the recoding, invesgaon and annual dose limits, and d ifferent angle of incidents (e. g. 0, 20, 40 and 60 degree). Results: The results of this tesng sasfies the overall accuracy criteria with 95% confidence levels specified by the ICRP, except that of RPL technique in low energy which overesmates the dose out of the acceptable accuracy band defined as the ICRP trumpet curves. Conclusion: The inter-comparison has proved that the personal dose equivalent quanty, H p(10), defined by the ICRU and recommended by the IAEA are becoming widely accepted and implemented in most parcipated laboratories.