Assessment of Internal Exposure Doses in Fukushima by a Whole Body Counter Within One Month after the Nuclear Power Plant Accident
Assessment of Internal Exposure Doses in Fukushima by a Whole Body Counter Within One Month after the Nuclear Power Plant Accident
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DOI：
10.1667/rr3232.1
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发表时间：
2013-06-01
影响因子：
3.4
通讯作者：
Yamashita, Shunichi
中科院分区：
文献类型：
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作者：
Matsuda, Naoki;Kumagai, Atsushi;Yamashita, Shunichi
2011年3月11日发生核电站事故后，由于初期组织困难、本底辐射高和辐射测量装置污染，有关福岛早期内部辐射剂量的信息相当有限。在距离福岛约1，200 km的长崎，自2011年3月15日起，通过全身计数器（WBC）测量了撤离人员和短期访问福岛的人员的体内放射性。2011年3月11日至4月10日期间，在福岛县居住的173人使用配备两个NaI（Tl）闪烁探测器的水平床型扫描WBC。平均住院时间为4.8天。根据急性吸入情况，将内放射性转换为估计摄入量，然后评价承诺有效剂量和甲状腺剂量。在30%以上的受检个体中检测到I-131、Cs-134和Cs-137。在3月12日至3月18日期间留在福岛的受试者中，每种放射性核素的检出率约高出50%，所有三种核素的检出率高出44%。最大承诺有效剂量和甲状腺等效剂量分别为1 mSv和20 mSv。虽然研究的对象和定居点数量有限，但结果表明，事故发生后不久，由于摄入放射性物质而导致的福岛内部辐射照射可能不会导致任何确定性或随机性的健康影响。(C)2013年，辐射研究学会
Information on early internal radiation doses in Fukushima after the nuclear power plant accident on March 11, 2011, is quite limited due to initial organizational difficulties, high background radiation and contamination of radiation measuring devices. In Nagasaki, approximately 1,200 km away from Fukushima, the internal radioactivity in evacuees and short-term visitors to Fukushima has been measured by a whole body counter (WBC) since March 15, 2011. A horizontal bed-type scanning WBC equipped with two NaI(Tl) scintillation detectors was used for 173 people who stayed in the Fukushima prefecture between March 11 and April 10, 2011. The average length of stay was 4.8 days. The internal radioactivity was converted to an estimated amount of intake according to the scenario of acute inhalation, and then the committed effective dose and the thyroid dose were evaluated. I-131, Cs-134 and Cs-137 were detected in more than 30% of examined individuals. In subjects who stayed in Fukushima from March 12 to March 18, the detection rate was approximately 50% higher for each radionuclide and 44% higher for all three nuclides. The maximum committed effective dose and thyroid equivalent dose were 1 mSv and 20 mSv, respectively. Although the number of subjects and settlements in the study are limited, the results suggest that the internal radiation exposure in Fukushima due to the intake of radioactive materials shortly after the accident will probably not result in any deterministic or stochastic health effects. (C) 2013 by Radiation Research Society