Deposition of radioactive caesium in the Fukushima mountain forests by the Fukushima Nuclear Power Plant accident

福島第一原子力発電所事故による福島山地森林における放射性セシウムの沈着状況

石井 康雄; 阿部 寛信 ; 新里 忠史  

Ishii, Yasuo; Abe, Hironobu; Niizato, Tadafumi

本研究では福島県内の川内村荻地区, 川俣町山木屋地区に設置した森林観測プロットおよび浪江町大柿地区の砂防ダムにおいて、表面流出物質の特性および放射能分析について報告する。

As part of the project entitled "Long-Term Assessment of Transport of Radioactive Contaminant in the Environment of Fukushima" (F-TRACE project), JAEA has researched since November 2012 to predict the transport behavior of radioactive caesium, which now Cs-134 and Cs-137 are the main radiological contribution, from contaminated mountain forests to estuary and coast through dam, pond, river etc. based on their investigated data survey data in the Fukushima prefecture. In this study, we report characterization and radio assay of the surface run-off substances obtained (or collected) at the forest observation plots in the Ogi district of Kawauchi-mura and the Yamakiya district of Kawamata-machi, and at the soil-saving dam in the Ogaki district of Namie-machi, Fukishima prefecture, Japan.