[2H11-14] Detector Development 2

[2H13] A novel dosimeter technique using quadruple-phoswich scintillator for beta/gamma simultaneous counting and discriminating.

(3)Accuracy of dose-rate measurements

*Naoto Kume¹, Tatsuyuki Maekawa², Shunichiro Makino², Kentaro Kikuchi², Munenori Akiyama², Takuro Fujimaki¹, Eiichi Fujiwara² (1. TOSHIBA ESS, 2. T-RS)

Keywords:beta-ray, gamma-ray, phosich, scintillator

At Fukushima-Daiichi decommissioning site, beta-ray management is extremely important.With the legislation of lowering the eye lens dose limit, more convenient and reliable measurement tool of dose rate is required. We have developed a quadruple phoswich scintillation detector using real-time pulse shape discrimination method and dose equivalent rate calculations. Measurement accuracy of prototype detector applied new algorithm was evaluated using some beta and gamma sources.