Inherent Safety Fast Reactor Concept of KAMADO-FR2 Design of Ultra-long Life Core and Reuse of LWR Spent Fuels

We designed an ultra-long-life core (ULLC) and reactor concept, KAMADO-FR2, with metal U-Pu-10Zr fuels to effectively use uranium and plutonium resources.Metal fuel assemblies are loaded in a pressure vessel containing carbon dioxide (CO2) at 3 MPa.We studied the ultra-long-life core and achieved the core burnup of 256 MWd/kgHM with Pu/(U+Pu) 8% enrichment fuels by the conversion ratio 0.96, which can extend the utilization of nuclear fuel resources effectively without reprocessing and can reuse light water reactor (LWR) spent fuel assemblies.