Simulation study on H behavior in the Fukushima coastal region; Comparison of influences of discharges from the Fukushima Daiichi and rivers

Sakuma, Kazuyuki   ; Yamada, Susumu  ; Machida, Masahiko  ; Kurikami, Hiroshi  ; Misono, Toshiharu   ; Nakanishi, Takahiro   ; Iijima, Kazuki  

This article reports the H behavior in the Fukushima coastal region, considering the effects of FDNPP discharge and riverine H inputs. The simulation results showed that discharges from the port of Fukushima Daiichi dominantly affected the H concentrations in monitoring points within approximately 1 km. Moreover, the results indicate that the effect of riverine H discharge was limited around the river mouth under base flow conditions. However, its impact on the Fukushima coastal regions under storm flow conditions was found, and the H concentrations in seawater in the Fukushima coastal region were formed around 0.1 Bq/L (mean H concentrations in seawater in the Fukushima coastal region) in the near shore.