Evaluation of environmental contamination and estimated radiation doses for the return to residents' homes in Kawauchi Village, Fukushima prefecture.
Evaluation of environmental contamination and estimated radiation doses for the return to residents' homes in Kawauchi Village, Fukushima prefecture.
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DOI：
10.1371/journal.pone.0045816
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Takamura N
中科院分区：
文献类型：
--
作者：
Taira Y;Hayashida N;Yamaguchi H;Yamashita S;Endo Y;Takamura N
为了评价福岛县川内村（福岛第一核电站（FNPP）30 km半径范围内的限制区域）人工放射性核素造成的环境污染和辐射照射剂量率，采用γ能谱法分析了土壤样品、针叶和蘑菇中人工放射性核素的浓度。2011年12月19日和20日，即福岛第一核电站事故发生9个月后，收集了9个月的样品，所有样品中普遍存在的剂量形成人工放射性核素为134 Cs和137 Cs。土壤样本的外部有效剂量估计值在FNPP半径20公里范围内为0.42-7.2 µSv/h（3.7-63.0 mSv/y），在FNPP半径20-30公里范围内为0.0011-0.38 µSv/h（0.010-3.3 mSv/y）。目前的研究表明，川内村的水流水平正在充分下降，特别是在FNPP半径20至30公里范围内的地区。因此，居民可以返回家园，长期跟踪环境监测和对策，如消除污染和限制食物摄入，以减少不必要的接触。川内村的情况将是FNPP事故后返回居民家中的第一个模式。
To evaluate the environmental contamination and radiation exposure dose rates due to artificial radionuclides in Kawauchi Village, Fukushima Prefecture, the restricted area within a 30-km radius from the Fukushima Dai-ichi Nuclear Power Plant (FNPP), the concentrations of artificial radionuclides in soil samples, tree needles, and mushrooms were analyzed by gamma spectrometry. Nine months have passed since samples were collected on December 19 and 20, 2011, 9 months after the FNPP accident, and the prevalent dose-forming artificial radionuclides from all samples were 134Cs and 137Cs. The estimated external effective doses from soil samples were 0.42–7.2 µSv/h (3.7–63.0 mSv/y) within the 20-km radius from FNPP and 0.0011–0.38 µSv/h (0.010–3.3 mSv/y) within the 20–30 km radius from FNPP. The present study revealed that current levels are sufficiently decreasing in Kawauchi Village, especially in areas within the 20- to 30-km radius from FNPP. Thus, residents may return their homes with long-term follow-up of the environmental monitoring and countermeasures such as decontamination and restrictions of the intake of foods for reducing unnecessary exposure. The case of Kawauchi Village will be the first model for the return to residents’ homes after the FNPP accident.
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影响因子：
9.8
作者：
Tagami, Keiko;Uchida, Shigeo;Shirakawa, Yoshiyuki
通讯作者：
Shirakawa, Yoshiyuki
影响因子：
3.7
作者：
Monzen S;Hosoda M;Tokonami S;Osanai M;Yoshino H;Hosokawa Y;Yoshida MA;Yamada M;Asari Y;Satoh K;Kashiwakura I
通讯作者：
Kashiwakura I
影响因子：
2.2
作者：
Mück, K;Pröhl, G;Golikov, V
通讯作者：
Golikov, V
影响因子：
2
作者：
Taira, Yasuyuki;Hayashida, Naomi;Takamura, Noboru
通讯作者：
Takamura, Noboru