Internal dosimetry for radioactive caesium-137 in cedar pollen in the early phase of the Fukushima accident

福島第一原子力発電所事故初期におけるスギ花粉中セシウム137の内部被ばく線量評価

木名瀬 栄   

Kinase, Sakae

The author has assessed internal exposures of members of the public for chronic intake of Cs in cedar pollen after the Fukushima Daiichi Nuclear Power Plant accident. Committed effective and equivalent doses, and retention and excretion functions for Cs in the whole body were evaluated using the DSYS-chronic code, which was developed at the Japan Atomic Energy Agency (JAEA). It was found that committed effective and equivalent doses from chronic intake of Cs in cedar pollen were insignificant in 2012. The committed effective doses for adults in Fukushima, Ibaraki, and Tokyo were 1.6-1.810 Sv, 4.510 Sv, and 3.010 Sv, respectively. Retention and excretion functions for Cs in the whole body were found to be dependent on the times of intake and the fractional activity related to the chronic intake.