抄録
Recycling option of spent fuel (SF) can be adopted from accumulated spent fuel of light water reactors (LWR) to be used in fast breeder reactor (FBR) as well as spent fuels from FBR itself. Nuclear proliferation resistance aspect becomes one of the embodied challenges for introducing closed fuel cycle due to the production of fissile materials which has a potential for non-peaceful uses of nuclear energy. Reducing potential nuclear proliferation can be achieved by increasing material barrier which is associated with the isotopic material barrier as intrinsic aspect of proliferation resistance. Trans-uranium (TRU) compositions of LWR and multi-cycle FBR have been loaded in the FBR design by adopting 4 fuel batches system. 800 days of cycle length was used to investigate the proliferation resistance of plutonium as well as core performance, during reactor operation. Different compositions of TRU as initial fuel composition affect to the fuel behavior, criticality condition and fuel breeding capability. It shows less excess reactivity and better fuel breeding for MA doping in the core. High decay heat (DH) and spontaneous fission neutron (SFN) compositions of plutonium which is mainly caused by high production of even mass of plutonium isotopes will be compared from both typical trans-uranium compositions of LWR and FBR.
