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Improvement on the prediction accuracy of transmutation properties for fast reactor core using the minor actinides irradiation test data on the JOYO MK-II core

「常陽」MK-II炉心におけるMAサンプル照射試験データの適用による高速炉の核変換特性予測精度の向上

杉野 和輝

Sugino, Kazuteru

MA核データの検証及び高速炉を用いたMA核変換特性の予測精度向上のために「常陽」におけるMAサンプル照射試験データを活用した。照射試験データの解析の結果、計算値は実験値と良い一致を示し、JENDL-3.3のMA断面積は高速炉の解析においてほぼ満足の行く結果を生み出すことがわかった。また、本解析結果を用いた炉定数調整法の適用により高速炉におけるMA核変換特性の不確かさを半分以下にできる可能性のあることがわかった。

For a validation of MAs nuclear data and improvement on the prediction accuracy of MAs transmutation properties in fast reactor cores, the MAs sample irradiation tests data of Joyo were utilized. Result of their analyses showed good agreement with experimental value, which indicates that the MAs cross sections in JENDL-3.3 are almost satisfactory for an application to fast reactor cores. Further, the present study clarified that the utilization of those data with cross section adjustment technique has the potential to reduce the uncertainty of MAs transmutation properties in fast reactor cores to less than half.

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