Reactor Physics Analysis of Thorium-Based Fuel for Long-Life SMR Cores Using Seed-Blanket Fuel Concept

摘要

It is seen that this ratio is much higher for SB fuel than UO_2 in the thermal energy range, which is generally a design goal and opens the possibility of a thermal breeder. The SB gives 4000 pcm more initial reactivity suppression. One of the most important points that can be drawn from this study is that a SB fuel lattice needs less burnable absorber than UO_2 fuel to achieve the same poison performance. The higher initial reactivity suppression and relatively smaller reactivity swing of SB can make the task of reactivity control through BP design in a thorium-rich core easier.