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The Behaviour of radiocaesium deposited in an upland reservoir after the Fukushima Nuclear Power Plant accident

貯水池における放射性セシウムの動態

舟木 泰智; 萩原 大樹; 鶴田 忠彦

Funaki, Hironori; Hagiwara, Hiroki; Tsuruta, Tadahiko

In the autumn of 2012, the Japan Atomic Energy Agency (JAEA) launched a new research project named F-TRACE (Long-Term Assessment of Transport of Radioactive Contaminant in the Environment of Fukushima). The aims of this project are to develop a system for prediction of radiation exposure, taking into consideration the transport, deposition, and remobilisation behaviour of radiocaesium (RCs) from the highest contaminated mountain forests, down through the biosphere, before deposition in a number of different aquatic systems. Especially, it is important to understand balances of suspended and deposited particles and RCs inventory in inflow water, discharge water and bottom sediments of an upland reservoir. In this paper, we describe current research activities performed by JAEA at the Ogi Reservoir, Fukushima prefecture, Japan.

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