车载空气剂量率测量系统KURAMA-II的特性与验证
Characteristics and verification of a car-borne survey system for dose rates in air: KURAMA-II.
作者信息
Tsuda S, Yoshida T, Tsutsumi M, Saito K
机构信息
Fukushima Environmental Safety Center, Headquarters of Fukushima Partnership Operations, Japan Atomic Energy Agency, Tokyo 100-8577, Japan.
Fukushima Environmental Safety Center, Headquarters of Fukushima Partnership Operations, Japan Atomic Energy Agency, Tokyo 100-8577, Japan.
出版信息
J Environ Radioact. 2015 Jan;139:260-265. doi: 10.1016/j.jenvrad.2014.02.028. Epub 2014 Mar 31.
The car-borne survey system KURAMA-II, developed by the Kyoto University Research Reactor Institute, has been used for air dose rate mapping after the Fukushima Dai-ichi Nuclear Power Plant accident. KURAMA-II consists of a CsI(Tl) scintillation detector, a GPS device, and a control device for data processing. The dose rates monitored by KURAMA-II are based on the G(E) function (spectrum-dose conversion operator), which can precisely calculate dose rates from measured pulse-height distribution even if the energy spectrum changes significantly. The characteristics of KURAMA-II have been investigated with particular consideration to the reliability of the calculated G(E) function, dose rate dependence, statistical fluctuation, angular dependence, and energy dependence. The results indicate that 100 units of KURAMA-II systems have acceptable quality for mass monitoring of dose rates in the environment.
由京都大学研究反应堆研究所开发的车载测量系统KURAMA-II，已在福岛第一核电站事故后用于空气剂量率测绘。KURAMA-II由一个CsI(Tl)闪烁探测器、一个GPS设备和一个用于数据处理的控制设备组成。KURAMA-II监测的剂量率基于G(E)函数（能谱-剂量转换算子），即使能谱发生显著变化，该函数也能根据测量的脉冲高度分布精确计算剂量率。对KURAMA-II的特性进行了研究，特别考虑了计算出的G(E)函数的可靠性、剂量率依赖性、统计涨落、角度依赖性和能量依赖性。结果表明，100套KURAMA-II系统对于环境中剂量率的大规模监测具有可接受的质量。
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