Performance of the H(10) and H(0.07) measurable electronic pocket dosimeter for - and -rays

Takahashi, Masa ; Sekiguchi, Masato; Miyauchi, Hideaki ; Tachibana, Haruo ; Yoshizawa, Michio  ; Kato, Toru*; Yamaguchi, Akihito*

In this study, the H(10) and H(0.07) detectable electronic pocket dosimeter(EPD-101) manufactured by ALOKA CO., LTD. was examined for (1) energy dependences for and -rays and (2) applicability for actually personal dosimetry in the mixed radiation fields. The energy responses of EPD-101 were obtained by standard irradiation in the Facility of Radiation Standards in the Japan Atomic Energy Agency (JAEA). The responses of EPD-101 were shown to be within 20% in the irradiated energy range for the both radiations except for Pm emitting low-energy -rays. In order to examine the applicability of EPD-101 in actual radiation workplaces, measured values of EPD-101 were compared with those of two other types of dosimeters (glass dosimeters and thermoluminescence dosimeters) in hot cells of the Reactor Fuel Examination Facility in JAEA. As a result, EPD-101 showed lower dose for -ray and higher dose for -ray than the other two dosimeters. The differences should be attributed to high-energy -emitting sources such as Ru-Rh in the facility.