Alternative configurations for the QUADRISO fuel design concept

This letter extends the work performed at Argonne National Laboratory on the QUADRISO fuel particles concept for High Temperature Reactors. Different configurations of the QUADRISO fuel particles concept are proposed and examined. The concept of QUADRISO fuel particles allocates an extra burnable poison layer next to the fuel kernel to reduce the initial excess of reactivity and enhance the reactor performance. The alternative proposed configurations introduced in this letter compare the performances of the previous configuration with two alternative configurations where the burnable poison is mixed in the fuel kernel for simplifying the manufacture process or in the outer pyrocarbon layer.