Radioactive contamination of fish in Tokyo Bay and Edogawa River due to the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident

機関リポジトリ Web Site

この論文をさがす

抄録

[Abstract] Radioactive contamination due to the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident to fish inhabiting Tokyo Bay and Edogawa River was investigated. More than 100 Bq •kg-1 of radioactive cesium, which is the regulation value of foods related to radioactive contamination in Japan, were detected from eels collected in Edogawa River in 2013, two years after the FDNPP accident. Radioactive cesium precipitated in a high contamination zone in the eastern part of Tokyo metropolitan and the northern part of Chiba Prefecture flows into Tokyo Bay through Edogawa River. This radioactive cesium was thought to be a source of contamination of eels and other fish. In Tokyo Bay the benthic fish like goby was contaminated with the radioactive cesium. The contamination of fishes inhabiting in Tokyo Bay and Edogawa River due to the radioactive cesium continues even now, about 6 years have passed since the FDNPP accident. However, the organs of the shellfish living in Tokyo Bay were clearly contaminated by radioactive nuclide 110mAg immediately after the FDNPP accident. It suggests the possibility that non-volatile radioactive materials such as crushed nuclear fuel particles also flew to the Tokyo metropolitan areas and were precipitated there.

Departmental Bulletin Paper

application/pdf

収録刊行物

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ