National Institute of Radiological Sciences, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan.
Radiat Prot Dosimetry. 2023 Jun 23;199(10):1110-1119. doi: 10.1093/rpd/ncad140.
More than 10 y have passed since the Fukushima Dai-ichi Nuclear Power Plant (F1-NPP) accident, but there are still many areas with high levels of radioactive contamination, especially reservoirs and lakes, where the levels decrease slowly. The exposed dose to non-human biota is of great concern. In this work, the exposure dose to wild medaka (small aquarium fish) around F1-NPP was measured/estimated by two approaches: in situ measurement and with the ERICA assessment tool. S2 is a reservoir located 7.5 km from F1-NPP, and the ambient dose rate was 25.0 μSv per h in 2012, but decreased to 4.82 μSv per h in 2021. The external exposure dose rate to wild medaka living there was 0.8-11.8 μGy per h (2017-21) by in situ measurement, and the estimated dose rate with the ERICA assessment tool was 0.6-54.5 μGy per h (2012-21). The estimated and measured doses to wild medaka are not expected to cause any significant radiation effects.
自福岛第一核电站（F1-NPP）事故发生以来已经过去了 10 多年，但仍有许多地区放射性污染水平很高，特别是水库和湖泊，这些地区的放射性水平下降缓慢。非人类生物群的受照剂量令人非常关注。在这项工作中，通过两种方法测量/估算了 F1-NPP 周围野生斑马鱼（小型水族馆鱼类）的受照剂量：现场测量和使用 ERICA 评估工具。S2 是一个位于 F1-NPP 7.5 公里处的水库，2012 年的环境剂量率为 25.0 μSv/h，但在 2021 年下降到 4.82 μSv/h。通过现场测量，生活在那里的野生斑马鱼的外照射剂量率为 0.8-11.8 μGy/h（2017-21 年），而使用 ERICA 评估工具估算的剂量率为 0.6-54.5 μGy/h（2012-21 年）。对野生斑马鱼的估计和测量剂量预计不会引起任何显著的辐射效应。
