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Nuclear data-induced uncertainty calculation for fast reactor eigenvalue separation

高速炉固有値間隔に対する核データ起因誤差の計算

千葉 豪

Chiba, Go

固有値間隔は原子炉炉心の安定性の指標と考えられており、それを用いることでより合理的な炉心設計が可能となるとされている。本研究では、中型、及び大型の高速炉心を対象として固有値間隔に対する核データ起因誤差を計算した。結果は1.0%以下となり、固有値間隔に対する核データ起因誤差は無視できることを示した。

It has been suggested that an eigenvalue separation is considered as an index of reactor core stability, and that core design study can be carried out more effectively with it. The objective of the present study is to grasp a degree of nuclear data-induced uncertainty for the eigenvalue separation. The nuclear-data induced uncertainty for the eigenvalue separations were calculated at less than 1.0% for both the medium-sized and large-sized fast reactors. It can be concluded that nuclear data-induced uncertainty of eigenvalue separations is negligible.

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