埼玉県衛生研究所Saitama Prefectural Institute of Public Health
埼玉県住民の食品からの放射性物質摂取量及び内部被ばく線量推定のため，日常食（陰膳食）及び弁当等を調査した。日常食の（134Cs +137Cs）濃度は平均0.054 Bq/人・日，弁当は平均0.018 Bq/個であった。測定した日常食及び弁当を1年間摂取した場合の成人の預託実効線量は，日常食は0.26 μSv, 弁当も0.26 μSvであった。今回の日常食の預託実効線量は福島第一原発事故直後より減少し，一般公衆の線量限度1 mSv/年の0.03％以下であった。
In order to estimate the human intake and the committed effective dose of several radioactive materials, the duplicate diet samples sampled from Saitama residents and boxed lunches were analyzed. The average concentration of radioactive caesium (134Cs+137Cs) in the duplicate diet samples was 0.054 Bq/person·day, and that of boxed lunches was 0.018 Bq/piece. The annual committed effective dose of the duplicate diet samples is estimated to be 0.26 μSv and that of boxed lunches is estimated to be 0.26 μSv. It is found that the doses of both are less than 0.03％ of the annual effective dose limit for members of the public (1 mSv/year).
Key words: radioactive caesium; total diet; duplicated diet method; daily intake; boxed lunch; committed effective dose; Fukushima Dai-ichi Nuclear Power Plant Accident
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