Computational Modeling of Radioactive Contaminants in the Fukushima Environment

摘要

Significant amounts of radioactive materials were released to the atmosphere from the Fukushima Dai-ichi NPP after the accident caused by the major earthquake and devastating tsunami on 11 March 2011. The prediction of the distribution and fate of radioactive materials eventually deposited at surface in the Fukushima area is a primary objective and expected to be achieved in an efficient manner. In order to make such a prediction, it is important to gather information regarding the main migration pathways for radioactive materials in the environment and the time dependences of the radioactive material transport over the long term. The radionuclide of most concern in the Fukushima case is radioactive cesium, ~(137)Cs . Previous surveys indicate that the primary transportation mechanisms of ~(137)Cs are either soil erosion and water transport of sediment-sorbed contaminants or transport of dissolved Cs in the water drainage system such as rivers .