STUDY ON SUPER-LONG-LIFE CORES LOADED WITH MINOR ACTINIDE FUEL

Super-long-life fast breeder reactor cores (SLLC) loaded with minor ac tinide (MA) fuel were designed aiming at continuous operation without refueling during plant lifetime and efficient reduction of MA nuclides (Np, Am and Cm). The feasibility was studied from nuclear and thermal characteristics. As a result, 1000 MWe and 300 MWe SLLCs with small r eactivity change and power swing during plant lifetime were found to b e feasible. MAs can be confined and transmuted in the reactor during p lant life. A 1000 MWe SLLC can transmute MAs of 10 ton which come from 13 light water reactors (1000 MWe).