Proposal for maintenance optimization scheme based on system based code concept

To develop rationalized maintenance plans for nuclear power plants, the characteristics of each plant must be considered. For sodium-cooled fast reactor (SFR) constraints on inspections exist due to specialty that equipment retaining sodium handled, which is one important points considered in rationalization. In this study, we propose a optimization scheme, design support tool, using risk information strategy based system code (SBC) concept. The SBC concept intends provide theoretical procedure optimize reliability structure, and components (SSCs) by administrating every related engineering requirements throughout life SSCs from decommissioning. “The American Society Mechanical Engineers (ASME) Boiler Pressure Vessel Code, Code Case, N-875, Alternative In-service Inspection Requirements Liquid-Metal Reactor Passive Components” was developed basic Case has also been implemented ASME Section XI, Division 2,” provides Reliability Integrity Management programs including advanced reactors. purpose study establish detailed procedures scheme N-875. Furthermore, quantitative trial evaluation core structure next SFR under development Japan performed scheme.