Analyses of radiation shielding and dose reduction in buildings for gamma-rays emitted from radioactive cesium in environment discharged by a nuclear accident

Furuta, Takuya   ; Takahashi, Fumiaki  

Precise dose assessment requires the factors for each building. In addition, the data were based on researches for foreign buildings, which may be different from Japanese buildings. We therefore surveyed building trends in Fukushima and selected representative houses and buildings. 3-D models of the buildings were constructed and the radiation doses inside the buildings were calculated by PHITS to derive the effects of shielding and dose reduction by the buildings. The results provide us useful knowledge for dose assessment of residents in Fukushima area.