Thermoluminescent Neutron Dosimeter with Internal Energy: Response Correction

摘要

Personnel exposures at Mound are to unmoderated and moderated neutrons from ( alpha ,n) reactions and to spontaneous fission and neutron induced fissions from exp 238 Pu and exp 252 Cf (an enriched-uranium subcritical assembly). Most of the exposure occurs in shielded glovebox lines used for processing exp 238 PuO sub 2 . Because the neutrons are of low average energy, it was decided that a thermoluminescent (TL) dosimeter might be a suitable replacement for film. Some TL dosimeters in use in the U.S.A. were tested along with NTA film. Internal energy calibration was a possibility with one of the TL dosimeters (Fa71) and this dosimeter became the basis for our dosimeter design. Basically, this dosimeter contains two cadmium shielded exp 5 LiF chips with one being shielded on the source side (front shielded) and the other shielded on the wearer side (back shielded). The dosimeter also included a exp 7 LiF chip with each of the exp 6 LiF chips to correct the exp 6 LiF chips for photon response. (ERA citation 04:014386)