Distribution of cesium-bearing microparticles in the paddy field and their effect on transfer factor of radioactive cesium for brown rice

Tatsuno, Takahiro*; Nihei, Naoto*; Yoshimura, Kazuya  

This study investigated the changes of radioactive cesium-bearing microparticles (CsMPs) deposition in the paddy field during the first year of resumed cultivation following the Fukushima Daiichi Nuclear Power Plant accident. Furthermore, we evaluate the contribution of CsMPs on a transfer factor (TF) of radiocesium (RCs) into brown rice. As a result, the accumulation of RCs and CsMPs in our study field was not observed. RCs concentration of brown rice was less than the shipping limit by defined by Japanese government. These suggest that there is little secondary contamination, and cultivation can be done safely. Furthermore, a significant effect of CsMPs on the TF was not found Cleary.