[2A13-19] Environmental Radioactivity and Monitoring 3

[2A13] Investigation on distribution of radioactive substances in Fukushima

(13)Temporal trends of radiocesium concentration in tree bodies based on the analysis of the extensive regional survey of forests in Fukushima Prefecture

*Keisuke Mori¹, Hiroaki Kato¹, Yuichi Onda¹, Toshiro Yamaguchi¹ (1. Univ. of Tsukuba )

Keywords:Fukushima NPP accident, Radiocesium, Forest, Fukushima Prefecture, Temporal trend

The accident at the Fukushima nuclear power plant has released large amounts of radioactive cesium into the air, and large areas were contaminated. The purpose of this study is to predict the behavior of radiocesium and to collect knowledge for countermeasures in forestry and agriculture using the data at multiple sites in Fukushima Prefecture. As a result of the study, it was found that the migration of radioactive cesium in red pine wood reached a steady state, but the in the case of cedar and cypress wood, the transition from sapwood to heartwood continues even now. it was found that the dynamics of radioactive cesium varied depending on the tree species and the research needs to be continued.