350 BWRシュラウドサポート部の溶接時3次元温度分布推定解析(OS10-3 照射劣化,溶接部評価,OS10 エネルギー機器の経年変化に関する健全性評価手法の開発とその適用(2))

抄録

Steady state Eulerian analysis on thermal simulation of welds using moving coordinates is known as a very computationally efficient method. This paper presents steady state Eulerian thermal analysis that is applied for the BWR shroud support weld joints H8 and H9. In this analysis, model parameters of heat inputs are defined by only welding condition and material properties, therefore, no calibration with measured data required. Comparison between the analyzed temperature histories and the measured experimental results of BWR shroud support weld joints H8 and H9 shows that the numerical results reproduce the measured results well. From this study, by applying the steady state Eulerian thermal analysis with conventional stress analysis, it is shown that welding temperature histories can be estimated without mockup experiments for heat input calibration.