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

福島沿岸域におけるH動態のシミュレーション; 福島第一原子力発電所及び河川からの流出影響の比較

佐久間 一幸   ; 山田 進  ; 町田 昌彦  ; 操上 広志  ; 御園生 敏治   ; 中西 貴宏   ; 飯島 和毅  

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.