福島における放射性物質の分布状況調査と関連研究,9; 生活行動経路に沿った空間線量率に基づく被ばく評価

Mapping project in Fukushima and related researches, 9; Estimation of exposed dose by measurement of air dose rate considering daily activity pattern

佐藤 哲朗*; 安藤 真樹  ; 斎藤 公明  

Sato, Tetsuro*; Ando, Masaki; Saito, Kimiaki

避難指示解除準備区域に住民が帰還した際に予想される生活行動パターンと経路を詳細に聞き取り調査し、その行動経路全体をカバーする空間線量率の測定を、KURAMA-IIを使用して実施した。住民が帰還した際に普段の生活で受ける被ばく線量を推定した結果、年間の追加被ばく線量の最小値が0.31[mSv]、最大値が2.62[mSv]となった。また、対象者65名のうちの72%にあたる47名の年間の追加被ばく線量は1.0[mSv]以下であった。

The life behavior patterns and the path expected when the residents returned to the evacuation order release preparation area were investigated through interviews, and the air dose rates over the path measured with KURAMA-II. The results of expectation of exposure dose received in daily life when the residents returned to the areas showed that the minimum value of the additional exposure dose of a year was 0.31[mSv] and the maximum one was 2.62[mSv], and that the additional exposure dose of a year for 47 people which is 72% of the subject 65 people was less than 1.0[mSv].