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高温ガス炉の炉内材料に対する照射損傷評価法の整備

Development on radiation damage calculation method for HTGR in-core structural material

深谷 裕司; 後藤 実; 柴田 大受

Fukaya, Yuji; Goto, Minoru; Shibata, Taiju

高温ガス炉の炉内材料に対する照射損傷評価法に関する研究を行った。初めに、照射損傷評価法に関する理論および評価法の調査を行った。次に、一般的に使われている炉定数作成コードNJOYを用いたDPA断面積評価手法を含めたDPA評価法を整備した。これらの評価を簡便に実施するため、先行研究で開発されたNJOYをソルバーとして組み込んだDPA評価コードシステムNPRIMの機能を包絡するシステムの開発を行った。さらに、今後の評価手法の高度化に関する課題の抽出を行った。

A study on radiation damage calculation method for in-core structural material of HTGR had been performed. Firstly, a theory and a calculation method for radiation damage were investigated. Secondly, a DPA cross-section calculation method using NJOY, which is the typical reactor constants generation code, was established. Moreover, DPA calculation method was established. To evaluate these evaluations simply, calculation method was developed including the function of NPRIM which includes NJOY code as a solver and was developed in previous study. In addition, necessary items were identified to improve the method for accuracy.

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