Design Study for an Advanced Liquid-Metal Fast Breeder Reactor Core with High Burnup

Design studies are performed for a commercial liquid-metal fast breeder reactor core that can achieve a burnup of 200 GWd/t. A plutonium-type asymmetric parfait core with two different plutonium-enriched zones in the axial direction as well as in the radial direction is studied. This core concept solves core design problems related to high burnup, and it is possible to achieve a burnup of 200 GWd/t with this concept. A core with ductless fuel assemblies suitable for high burnup is also studied. An axially heterogeneous core was selected from among various concepts. It is possible to realize a core with a burnup of 200 GWd/t, a compact size, and a lower core pressure drop than the demonstration reactor design.