Estimation of internal exposure of the thyroid to 131I on the basis of 134Cs accumulated in the body among evacuees of the Fukushima Daiichi Nuclear Power Station accident
Estimation of internal exposure of the thyroid to 131I on the basis of 134Cs accumulated in the body among evacuees of the Fukushima Daiichi Nuclear Power Station accident
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DOI：
10.1016/j.envint.2013.09.013
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发表时间：
2013-11-01
影响因子：
11.8
通讯作者：
Kashiwakura, Ikuo
中科院分区：
文献类型：
--
作者：
Hosoda, Masahiro;Tokonami, Shinji;Kashiwakura, Ikuo
浪江镇因福岛第一核电站事故受到严重污染。浪江居民的甲状腺当量剂量是利用核事故发生后数月由日本原子能机构进行的全身计数检查的结果估算的。作者先前使用NaI（Tl）闪烁光谱仪测量了I-131和Cs-134的光子峰，并将该信息用于估计本研究中总摄入量的I-131/Cs-134活度比。对应于甲状腺摄取因子0.3、0.1和0.03的I-131/Cs-134活性比的最大值分别被评估为0.9、2.6和8.7。使用I-131/Cs-134活度比的最大值来获得最保守的甲状腺当量剂量估计。根据全身计数器测量的体内蓄积的Cs-134，甲状腺对（131 I）的最大内照射量估计为18 mSv。这一数值远低于国际原子能机构建议的受辐射者服用稳定碘片的剂量50毫希。(C)2013爱思唯尔有限公司保留所有权利。
Namie Town was heavily contaminated by the Fukushima Daiichi Nuclear Power Station accident. The thyroid equivalent dose for residents who lived in Namie was estimated using results of whole body counting examinations which were carried out by the Japan Atomic Energy Agency a few months after the nuclear accident. Photon peaks of I-131 and Cs-134 were previously measured by the authors using a NaI(Tl) scintillation spectrometer and that information was used to estimate the I-131/Cs-134 activity ratio of total intake in the present study. The maximum values of I-131/Cs-134 activity ratio corresponding to thyroid uptake factors of 0.3, 0.1 and 0.03 were evaluated to be 0.9, 2.6 and 8.7, respectively. The maximum value of the I-131/Cs-134 activity ratio was used to obtain the most conservative thyroid equivalent dose estimation. The maximum internal exposure of the thyroid to (131I) on the basis of Cs-134 accumulated in the body measured by the whole body counter was estimated to be 18 mSv. This value was much smaller than 50 mSv that the International Atomic Energy Agency recommends as the dose at which exposed persons should take stable iodine tablets. (C) 2013 Elsevier Ltd. All rights reserved.