원전 노즐 용접부 잔류응력 예측에 대한 유한요소 해석 Round Robin 결과 및 분석

Results and analyses for simulational round robin on welding residual stress prediction in nuclear power plant nozzle

In this paper, results of simulational round robin test on residual stress prediction was provided. Welding residual stress is one of the reasons for primary water stress corrosion cracking in PWR. Therefore, quantifying the welding variables and defining the recommendation for prediction welding residual stress is important. Through the round robin test, it is known that compressive axial and hoop residual stress occurs in dissimilar metal weld and pre-existing residual stress distribution in dissimilar metal weld was affected by similar metal weld due to short length of safe end.