Response comparison of an optically stimulated luminescent dosimeter, a direct-ion storage dosimeter, and a thermoluminescence dosimeter

摘要

This study was undertaken to compare the response of three dosimeters todifferent environments. Comanche Peak Nuclear Power Plant wants to replace thecurrent badge of record. The RaDos DIS-1 direct-ion storage dosimeter (DIS-1) and theLandauer InLight optically stimulated luminescence dosimeter (OSL) are the twocandidates for replacement of the Panasonic UD-802 thermoluminescence dosimeter(TLD). The dosimeters were compared in five categories: dose linearity, dose-ratelinearity, fade response, humidity response, and the angular dependence of thedosimeters.The major results include verified linear relationship evidence for dose and doserateand a better fade response for both the DIS-1 and OSL. The TLDs faded by 9.2%over a month and the DIS-1 and OSL faded by 4.2% and 1%, respectively. Following adose of 557.5 mrem, the dosimeters were exposed to different relative humidites. Thedose to the DIS-1 and OSL did not change drastically while the TLDs dose readout wasreduced by 10%. Finally, the angular dependence of the dosimeters was compared andthe worst responses were 66% at 90? in the horizontal orientation for the OSL and 1.7% at 90? in the horizontal orientation for the DIS-1. Based on the results of these tests theOSL seems like a more viable candidate for the new badge or record.