External Doses Available for Epidemiological Studies Related to the Fukushima Health Management Survey: First 4-month Individual Doses and Municipality-average Doses for the First Year.
External Doses Available for Epidemiological Studies Related to the Fukushima Health Management Survey: First 4-month Individual Doses and Municipality-average Doses for the First Year.
复制标题
DOI：
10.2188/jea.je20210166
复制
发表时间：
2022
影响因子：
4.7
通讯作者：
中科院分区：
文献类型：
--
作者：
福岛健康管理调查（FHMS）的组成部分之一是基本调查，该调查估计了2011年核电站事故发生后头4个月的个人外部剂量。然而，长期的外部暴露仍在继续。根据国际组织的估计，第一年的外部剂量占长期剂量的很大一部分。因此，本研究旨在通过外推基本调查结果来估计第一年的剂量。对于大多数非疏散地区的城市，在事故发生后对每个城市至少一个指定地点的环境剂量率进行了连续测量。在本研究中，假定居民在一段时间内接受的市政平均剂量与同一时期在该市政指定地点测量的环境剂量成正比。基于这一假设，根据基本调查结果计算的4个月的市政平均剂量被外推，以获得第一年的剂量。非疏散地区49个城市第一年的外推剂量与科委会估计的剂量有很好的相关性，尽管外推剂量一般较高（回归线斜率：1.23）。外推的市政平均剂量与个人剂量计测量值基本一致（在30%以内），表明外推是合理的。本文件报告了福岛县所有59个市的头4个月平均剂量和49个市的第一年外推剂量。外推的剂量将成为未来与FHMS有关的流行病学研究的基础。
One of the components of the Fukushima Health Management Survey (FHMS) is the Basic Survey, which estimates individual external doses for the first 4 months after the 2011 nuclear power plant accident. However, external exposure continues long-term. According to estimations by international organizations, the external dose during the first year accounts for a significant part of the long-term dose. Thus, the present study was intended to estimate the first-year doses by extrapolating the Basic Survey results. For most municipalities of non-evacuated areas, ambient dose rate had been continuously measured for at least one designated point in each municipality after the accident. In the present study, a municipality-average dose received by residents for a period was assumed to be proportional to the ambient dose measured at the designated point of that municipality during the same period. Based on this assumption, 4-month municipality-average doses calculated from the Basic Survey results were extrapolated to obtain first-year doses. The extrapolated first-year doses for 49 municipalities in the non-evacuated areas had a good correlation with those estimated by UNSCEAR, although the extrapolated doses were generally higher (slope of the regression line: 1.23). The extrapolated municipality-average doses were in reasonable agreement (within 30%) with personal dosimeter measurements, suggesting that the extrapolation was reasonable. The present paper reports the first 4-month average doses for all 59 municipalities of Fukushima Prefecture and the extrapolated first-year doses for 49 municipalities. The extrapolated doses will be the basis for future epidemiological studies related to the FHMS.