Development of structural materials for JSFR - Overview and current status

This paper describes an overview and current status of the development of structural materials and core materials for Japanese Sodium Fast Reactors which is being conducted within the framework of the Fast Reactor Cycle Technology Development (FaCT) Project. Employing new materials is one of the most important key technologies that are necessary to achieve required level of safety, reliability and economic competitiveness of the Japanese Sodium Fast Reactors (JSFR). The new structural materials to be adopted in JSFR components are 316FR (Fast Breeder Reactor Grade Type 316 Stainless Steel) and Modified 9Cr-1Mo steel. The new core materials are oxide dispersed strengthened (ODS) and precipitation hardened (PH) ferritic steels.The development of these materials including the aspects such as the needs from plant design, material design, data acquisition, fabrication of materials of specific configurations planned for JSFR will be overviewed. Current status and path forward are also described