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Code-B-1 for stress/strain calculation for TRISO fuel particle (Contract research)

TRISO燃料粒子の応力/歪計算のためのCode-B-1(受託研究)

相原 純; 植田 祥平; 柴田 大受; 沢 和弘

Aihara, Jun; Ueta, Shohei; Shibata, Taiju; Sawa, Kazuhiro

高温ガス炉(HTGR)用の被覆燃料粒子の運転時破損率予測のため、既存のコードを改良してCode-B-1を開発した。Code-B-1においては、応力計算部に有限要素法(FEM)を適用し、既存のコードでは取り扱えなかった塑性変形を取り使えるようになった。

We have developed Code-B-1 for the prediction of the failure probabilities of the coated fuel particles for the high temperature gas-cooled reactors (HTGRs) under operation by modification of an existing code. A finite element method (FEM) is employed for the stress calculation part and Code-B-1 can treat the plastic deformation of the coating layer of the coated fuel particles which the existing code cannot treat.

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