反应堆压力容器役致裂纹验收标准制定方法研究OA

It is necessary to formulate the acceptance standard of service induced cracks for Pressurized Water Reactor Nuclear Power Plant reactor pressure vessel(RPV)to meet the needs of rapid assessment for cracks found during the in-service inspection.First,the formulation principle and method of service induced crack acceptance standard proposed by the Electric Power Research Institute(EPRI)are studied and discussed.Subsequently,taking the postulated crack in the fracture resistance analysis of RPV design stage as the benchmark crack,combined with the safety margin of the service induced crack acceptance standard,a mechanical analysis method for establishing acceptance standard for service-induced cracks is proposed based on the design benchmark crack and design safety factor.The service induced crack acceptance standard for RPV components is formulated using the method proposed in this paper,and the results of the developed acceptance standard for service induced crack are basically close to that in ASME code.The establishment method of service induced crack acceptance standard proposed in this paper is also applicable to other nuclear power pressure equipment.