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原爆線量DS02の改訂版(DS02R1線量)

Revised version of Dosimetry System 2002 (DS02R1)

古田 琢哉

Furuta, Takuya

現在の国際的な放射線防護基準は、広島・長崎の原爆被爆者の長期にわたる健康調査とDS02推定方式による被爆者個人別の線量推定値を基に策定されている。DS02は被爆時の所在地や周囲の遮蔽条件等の被爆者個人別の詳細データを入力として線量値を推定するため、入力値の精度が線量推定値の精度、そして放射線リスクの評価の精度に直結する。本解説記事では、DS02線量推定方式の核となるシステム本体はそのままに、被爆者個人別の詳細データの改善とその影響について調べた論文(DS02R1)を紹介する。

The current standard of the international radiation protection is determined through life span study of atomic bomb survivors of Hiroshima and Nagasaki, and individual radiation dose estimates for each survivor calculated by Dosimetry System 2002 (DS02). Dose estimates in DS02 are based on input data such as location and shielding condition of the survivor. Therefore accuracy of dose estimates and accordingly that of radiation risk evaluation are largely affected by the accuracy of the input data. In this review, we present an article DS02R1 discussed improvement of the input data of individual atomic bomb survivors for DS02 and its consequence keeping the core system unchanged.

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