Development of a Real-Time Environmental Radiation Dose Evaluation System for the Vicinity of a Nuclear Facility; A Study of a Real-Time Environmental Radiation Dose Evaluation System

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竹安 正則 ; 武石 稔 ; 清水 武彦; 飯田 孝夫*

Takeyasu, Masanori; Takeishi, Minoru; Shimizu, Takehiko; Iida, Takao*

東海事業所および大洗工学センター内の原子力施設から放射性物質が異常放出した場合に、環境中の線量を計算するために開発した計算機システム(SIERRA-II)の概要と、東海再処理施設平常運転時のモニタリングデータを用いて性能評価を行った結果について報告する。

A computer code system was developed to evaluate a real-time environmental radiation dose when radioactive substances were accidentally released from a nuclear facility. The examination of the system was performed by using the data of air absorbed dose rate observed at monitoring stations and monitoring posts around the Tokai Reprocessing Plant when Kr was discharged during its normal operation.