[2K10-15] Environmental Safety Assessment 1

[2K14] Simulations of Radiocesium Discharge from Abukuma River with Improved Cesium Wash-off Model

*Xudong Liu¹, Masahiko Machida¹, Hiroshi Kurikami², Akihiro Kitamura² (1. Center for Computational Science & e-Systems, Japan Atomic Energy Agency, 178-4-4 Wakashiba, Kashiwa, Chiba, 277-0871, Japan, 2. Sector of Fukushima Research and Development, Japan Atomic Energy Agency, 10-2 Fukasaku, Miharu-machi, Fukushima 963-7700, Japan)

Keywords:Fukushima Accident, Radiocesium, Migration, Depth Profile, Fixation, USLE

The present work aims to improve the Soil and Cesium Transport (SACT) model, which has been developed for simulating radiocesium redistribution after the Fukushima accident. Two mechanisms, namely, vertical migration, and long-term fixation of radiocesium in soil have been newly implemented. Without parameter tuning, the new SACT model shows improved agreement with measurement results.