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Relation between neutron dosemeter readings and calibration fields for various workplace spectra

中性子作業場における線量計の指示値と校正条件の関係

三枝 純; 谷村 嘉彦   ; 吉澤 道夫  

Saegusa, Jun; Tanimura, Yoshihiko; Yoshizawa, Michio

異なる中性子場において校正された中性子線量計をさまざまな中性子作業場において使用した場合に得られる、線量計の指示値と作業場の線量当量との関係について数多くのデータをもとに分析した。その結果、線量計の校正が行われるべき中性子場は線量計のエネルギー応答特性の違いにより異なることがわかった。精度良い中性子線量評価を行うためには、線量計のエネルギー応答特性の改善を図るとともに、作業場と校正場の中性子スペクトルの違いを十分考慮したうえで測定を行う必要がある。

Relationships between dosemeter readings and the true dose equivalents at various workplaces were analyzed. From the analysis, it was shown that depending on the types of dosemeters, there exist a suitable calibration field, and the field differs by the difference of response characteristics of dosemeters. For the precise estimation of dose equivalent, it is important that measurement is carried out under the careful considerations of the difference between neutron spectrum at workplace and at calibration field, as well as the improvement of response characteristics of the dosemeters.

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