Minor actinides and fission products burning in dual-aimed fusion reactor

The paper presents the results of transmutation analysis of Minor Actinides (MA) and Fission Products (FP) from the Spent Nuclear Fuel (SNF) of nuclear power plants. The transmutation scenario includes repeating periods of neutron irradiation in dual-aimed Fusion Power Reactor-tokamak (FPR) with Deuterium-tritium plasma as neutron source and periods of Partitioning and Reprocessing (P and R) of fuel between the irradiation cycles. FPR is intended for power preduction and SNF burning. The investigations are based on the results of an RF DEMO-S fusion power reactor project with a fusion power of 2.5 GW and a modified blanket including fuel assemblies with minor actinides (Np, Am, Cm) and selected fission products (I-129, Tc-99, Cs-135, Zr-93, Pd-107, Sn-126). All obtained results are in conceptual stage and detailed engineering investigations will be required in case of the concept approval for imbedding in the total nuclear fuel cycle. Investigations allowed determining in general the design and composition of blanket which is optimal in three main parameters: (1) Safe value of neutron multiplication factor (about 0.7) which fully exclude a possibility of uncontrollable power rise during te reactor operation with passive safety. (2) Adequate burning rate of minor actinides and fission products. (3) Tritium self-supply for fusion reaction self-sustaining in plasma (Tritium Breeding Ratio will be greater than one, about 1,2). (author)