Measurement of individual doses of radiation by personal dosimeter is important for the return of residents from evacuation order areas after nuclear disaster.
Measurement of individual doses of radiation by personal dosimeter is important for the return of residents from evacuation order areas after nuclear disaster.
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DOI：
10.1371/journal.pone.0121990
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发表时间：
2015
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：
Orita M;Hayashida N;Taira Y;Fukushima Y;Ide J;Endo Y;Kudo T;Yamashita S;Takamura N
为了确认福岛第一核电站（FNPP）事故后居民返回的个人剂量评估的可用性，我们评估了临时居住在川内村疏散区的居民的个人剂量计测量的辐射个人剂量，川内村部分位于FNPP半径20 km范围内。我们还将个人剂量与根据环境剂量率估计的外部辐射剂量以及根据每个人房屋周围土壤中放射性核素浓度估计的剂量进行了比较。居民个人剂量与环境剂量的相关系数分别为：屋门前（r = 0.90，p<0.01）、后院（r = 0.41，p<0.01）和附近田地（r = 0.80，p<0.01）。后院和房屋周围田地的最大累积环境剂量分别为6.38和9.27 mSv/y。最大累积个人剂量为3.28 mSv/y，中位和最小剂量分别为1.35和0.71 mSv/y。土壤样本中人工放射性核素浓度估计的外有效剂量范围为0.03至23.42 mSv/y。个人剂量与后院（r = 0.38，p<0.01）和田间（r = 0.36，p<0.01）的外有效剂量呈中度相关，但与入口前的外有效剂量无显著相关（r = 0.01，p = 0.92）。我们的研究证实，即使在川内村的疏散命令区，个人剂量也很低，由于人工放射性核素的衰变和污染土壤的去污，外部有效剂量水平肯定在下降。需要对个人剂量以及内照射剂量、环境监测和基础设施重建进行长期跟踪，以便居民能够在核灾难后返回家乡。
To confirm the availability of individual dose evaluation for the return of residents after the accident at the Fukushima Dai-ichi Nuclear Power Plant (FNPP), we evaluated individual doses of radiation as measured by personal dosimeters in residents who temporarily stayed in Evacuation Order Areas in Kawauchi village, which is partially located within a 20 km radius of the FNPP. We also compared individual doses with the external radiation doses estimated from the ambient dose rates and with doses estimated from the concentrations of radionuclides in the soil around each individual’s house. Individual doses were significantly correlated with the ambient doses in front of the entrances to the houses (r = 0.90, p<0.01), in the backyards (r = 0.41, p<0.01) and in the nearby fields (r = 0.80, p<0.01). The maximum cumulative ambient doses in the backyards and fields around the houses were 6.38 and 9.27 mSv/y, respectively. The maximum cumulative individual dose was 3.28 mSv/y, and the median and minimum doses were 1.35 and 0.71 mSv/y. The estimated external effective doses from concentrations of artificial radionuclides in soil samples ranged from 0.03 to 23.42 mSv/y. The individual doses were moderately correlated with external effective doses in the backyards (r = 0.38, p<0.01) and in the fields (r = 0.36, p<0.01); however, the individual doses were not significantly correlated with the external effective doses in front of the entrances (r = 0.01, p = 0.92). Our study confirmed that individual doses are low levels even in the evacuation order area in Kawauchi village, and external effective dose levels are certainly decreasing due to the decay of artificial radionuclides and the decontamination of contaminated soil. Long-term follow-up of individual doses as well as internal-exposure doses, environmental monitoring and reconstruction of infrastructure are needed so that residents may return to their hometowns after a nuclear disaster.
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影响因子：
4.7
作者：
Yasumura S;Hosoya M;Yamashita S;Kamiya K;Abe M;Akashi M;Kodama K;Ozasa K;Fukushima Health Management Survey Group
通讯作者：
Fukushima Health Management Survey Group
影响因子：
3.7
作者：
Taira Y;Hayashida N;Yamaguchi H;Yamashita S;Endo Y;Takamura N
通讯作者：
Takamura N
影响因子：
3.7
作者：
Tsubokura M;Kato S;Nihei M;Sakuma Y;Furutani T;Uehara K;Sugimoto A;Nomura S;Hayano R;Kami M;Watanobe H;Endo Y
通讯作者：
Endo Y
影响因子：
3.7
作者：
Monzen S;Hosoda M;Osanai M;Tokonami S
通讯作者：
Tokonami S
影响因子：
--
作者：
Lochard, J;Bogdevitch, I;Weiss, W
通讯作者：
Weiss, W