Mathematical Modeling of Radioactive Contaminants in the Fukushima Environment

Kitamura, Akihiro   ; Kurikami, Hiroshi  ; Yamaguchi, Masaaki ; Oda, Yoshihiro ; Saito, Tatsuo  ; Kato, Tomoko ; Niizato, Tadafumi  ; Iijima, Kazuki  ; Sato, Haruo; Yui, Mikazu; Machida, Masahiko  ; Yamada, Susumu  ; Itakura, Mitsuhiro  ; Okumura, Masahiko   ; Onishi, Yasuo*

The prediction of the distribution and fate of radioactive materials eventually deposited at surface in the Fukushima area is one of the main objectives and expected to be achieved in an efficient manner. In order to make such prediction, a number of mathematical models of radioactive contaminants, with particular attention on cesium, on the land and in rivers, lakes, and estuaries in the Fukushima area are developed. Simulation results are examined with the field investigations simultaneously implemented. The basic studies of the adsorption/absorption mechanism of cesium and soils have been performed to shed light on estimating distribution coefficient between dissolved contaminant and particulate contaminant.