抄録
In the rules on fitness-for-service for nuclear power plants of the Japan society of mechanical engineers (JSME). failure assessment procedures are prescribed only for austenitic stainless steel and ferric steel. In this study, the failure assessment procedure for nickel alloy and its welding metal was investigated. Failure loads were evaluated for welding part of a pipe of 36B using the two-parameter failure assessment procedure. Axial and circumferential surface cracks were assumed and cHntegral values were evaluated by finite element analysis. Based on the failure assessment using material data, it was revealed the failure assessment procedure for plastic collapse (limit load analysis) can be applied for welding metal as well as base metal of the nickel alloy.
