Verification of probabilistic fracture mechanics analysis code PASCAL

確率論的破壊力学解析コードPASCALの検証

Li, Y. ; 勝又 源七郎*; 眞崎 浩一*; 林 翔太郎*; 板橋 遊*; 永井 政貴*; 鈴木 雅秀*; 関東 康祐*

Li, Y.; Katsumata, Genshichiro*; Masaki, Koichi*; Hayashi, Shotaro*; Itabashi, Yu*; Nagai, Masaki*; Suzuki, Masahide*; Kanto, Yasuhiro*

原子力機構では確率論的破壊力学解析コードPASCALを開発している。本研究では、産業界、大学及び研究所で構成するワーキンググループを設置し、解析コードの確率変数、解析機能及び解析フローに関する検証を実施した。一年の活動を通じて、PASCALの信頼性が確認された。

In Japan, a PFM analysis code PASCAL (PFM Analysis of Structural Components in Aging LWR) has been developed by the Japan Atomic Energy Agency to evaluate the through-wall cracking frequencies of Japanese reactor pressure vessels (RPVs) considering neutron irradiation embrittlement and pressurized thermal shock transients. In this study, as a part of the verification activities, a working group was established in Japan, with seven organizations from industry, universities and institutes voluntarily participating as members. The source program of PASCAL was released to the members of the working group. Through one year activities, the applicability of PASCAL for structural integrity assessments of domestic RPVs was confirmed with great confidence. This paper presents the details of the verification activities of the working group including the verification plan, approaches and results.