Hiroshima Atomic Bomb Survivors Relief Foundation, Kurakake, Asa-kitaku, Hiroshima, Japan.
J Environ Radioact. 2012 Aug;110:84-9. doi: 10.1016/j.jenvrad.2012.02.007. Epub 2012 Mar 16.
External and internal radiation doses were estimated for 15 residents who lived approximately 37 km northwest of the Fukushima Dai-ichi Nuclear Power Plant, which released radioactive plumes on March 11, 2011 as the result of the Tohoku earthquake and subsequent tsunami damage. Residents were interviewed on where they stayed and what they ate after the incident. To estimate external dose, the air dose rate around each person's home was measured, and cumulative effective doses up to 54 d after the deposition were calculated. To estimate committed effective dose, urinary bioassays were performed using a low-background Ge spectrometer on 54 d and 78-85 d after the deposition. The average cumulative effective dose was 8.4 mSv for adults and 5.1 mSv for children. The average committed effective dose from (134)Cs and (137)Cs was 0.055 mSv for adults and 0.029 mSv for children. Iodine-131 was observed from urinary samples of five residents, the equivalent doses for thyroid gland were 27-66 mSv at maximum. We discuss the necessity of reducing the risk of further exposure.
15 名居民居住在距离福岛第一核电站西北约 37 公里的地方，2011 年 3 月 11 日，由于东北地震和随后的海啸破坏，该核电站释放了放射性烟云。对这些居民进行了采访，询问了他们在事件发生后的居住地点和饮食情况。为了估算外照射剂量，测量了每个人家周围的空气剂量率，并计算了沉积后 54 天内的累积有效剂量。为了估算累积有效剂量，在沉积后 54 天和 78-85 天，使用低本底 Ge 谱仪对 54 名居民进行了尿生物监测。成年人的平均累积有效剂量为 8.4mSv，儿童为 5.1mSv。成年人和儿童的（134）Cs 和（137）Cs 的平均累积有效剂量分别为 0.055mSv 和 0.029mSv。从五名居民的尿液样本中观察到了碘-131，甲状腺的当量剂量在最大值时为 27-66mSv。我们讨论了减少进一步暴露风险的必要性。
