Assessment of external doses to the public considering variability and uncertainty

高原 省五

no journal, , 

We developed a dose assessment model based on the experiences from the Fukushima accident taking into account following three points: (i) to reflect the behavior patterns of Japanese population, (ii) to explore the effect of decontamination performed after the Fukushima accident, and (iii) to consider the influence from variabilities and uncertainties in the assessment. To address (i) and (ii), we performed the actual measurement of individual doses and ambient dose equivalent rates inside and outside houses, and surveys of behavior patterns were performed in Fukushima city. The assessed results of the dose distribution agreed well with the results of actual measurements. In addition, the results of the variability and uncertainty analysis demonstrated that the range of dose distribution is strongly influenced by the spatial variability of radioactive contamination level and interpopulation differences in behavior patterns.