Effects of the nuclear disaster on marine products in Fukushima: An update after five years

• Published in: Journal of environmental radioactivity 2016-11, Vol.164, p.312-324
• Main Authors: Wada, Toshihiro, Fujita, Tsuneo, Nemoto, Yoshiharu, Shimamura, Shinya, Mizuno, Takuji, Sohtome, Tadahiro, Kamiyama, Kyoichi, Narita, Kaoru, Watanabe, Masato, Hatta, Nobuyuki, Ogata, Yasuo, Morita, Takami, Igarashi, Satoshi
• Format: Article
• Language: English
• Subjects: Animals; Cesium Radioisotopes - analysis; Demersal fish; Disasters; Ecological half-life; Ecosystem; Fishes - metabolism; Fukushima; Fukushima Nuclear Accident; Half-Life; Marine products; Radiation Monitoring; Radiocesium; Tokyo; Water Pollutants, Radioactive - analysis; Water Pollutants, Radioactive - metabolism
• ISSN: 0265-931X; 1879-1700
• DOI: 10.1016/j.jenvrad.2016.06.028

Original data (134Cs and 137Cs, and sampling location) of marine products in Fukushima Prefecture monitored during 2011–2015 (n = 32,492) were analyzed to present an updated detailed description of radiocesium contamination after the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident and to examine taxon/habitat-specific decreasing trends in different areas. Furthermore, marine species data presented by the Tokyo Electric Power Company (TEPCO) during 2012–2015 (n = 5458) were analyzed to evaluate the decreasing trends of 137Cs inside and outside (within a 20 km radius) of the FDNPP port. Monitoring results by Fukushima Prefecture show that percentages of samples higher than the Japanese regulatory limit of 100 Bq kg−1-wet (>RL%) were higher, whereas those below the detection limit (RL% and