[2M09-14] Environmental Radioactivity 3

[2M09] Investigation on distribution of radioactive substances in Fukushima

(15)Analysis of radiocesium discharge using a model in Yamakiya

*Seigo Fujiwara¹, Yuichi Onda¹, Yoshifumi Wakiyama², Hiroaki Kato¹ (1. Univ. of Tsukuba, 2. Fukushima Univ.)

Keywords:Soil erosion, Decontamination activity

Yamakiya area in Kawamata Town, Fukushima Prefecture, was designated as a special decontamination area due to the Fukushima Daiichi Nuclear Power Plant accident in 2011, and decontamination activities were carried out in 2014. During the decontamination activities, the surface layer of 5 cm of soil with high Cs-137 concentration was stripped by heavy machinery, and coarse granitic sand was applied. The sediment discharge from the decontaminated area has decreased compared to that before decontamination. We will clarify the influence of the decontamination activities on soil erosion in Fukushima Prefecture, and the amount of Cs-137 discharge in Yamakiya area was calculated using a model.