[1M01-04] Dosimeter Development

[1M02] A novel dosimeter technique using quadruple-phoswich scintillator for beta/gamma
simultaneous counting and discriminating.

(2)Apparatus Design and Priminary test

*naoto kume¹, tatsuyuki maekawa², Shunichiro Makino², Kentaro Kikuchi², Yuji Oshima², Eiichi Fujiwara² (1. Toshiba Energy Systems & Solutions Corporation, 2. Toshiba Power Systems Radiation Techno-Service Corporation)

Keywords:beta ray, gamma ray, phosich, quadruple, deisrimination

At Fukushima-daiichi decommissioning site, β-ray management is extremely important. With the legislation of lowering the eye lens dose limit, more convenient and reliable measurement tools of β-ray dose rate is strongly required. For β-ray dose rate measurement, ionization chamber survey meters usually adopted, but the evaluation of β-ray requires two measurements with and without a β-ray cutoff filter and subtraction of these data.

To measure β-ray dose without exchange β-ray cutoff filter, a new quadruple Phoswich scintillator have been developed. This time, Design of Phoswich scintillator and algorism to identify the events and some results of primary test will be shown.