Design of a fusion blanket system using molten salt Flinabe for transmutation of minor actinides - 5185

This study evaluates the neutronics characteristics of molten salt fusion blanket system using minor actinides pebbles in the flow channels to burn the actinides extracted from fission reactor spent fuels. Fusion reactors are considered as promising for transmutation of actinides due to the high energy D-T neutrons they produced. As a molten salt, this study utilize Flinabe, which is a mixture of LiF, NaF and BeF₂. Neutron transport and burn-up calculations are performed using simple spherical model and actual scale FFHR-d1 model. The results reveal that the blanket system using minor actinides (MA) pebbles has an attractive potential to destroy the actinides effectively because it can maintain a large MA inventory. In the DEMO fusion reactor FFHR-d1, the transmutation rate of MA and Pu is 10.5 ton/year, which covers the minor actinides extracted from 200 units of the liquid water reactor with reactor power of 1 GWe and burnup of 45 GWd/ton