Liquid-metal-cooled fast reactor core comprising nuclear fuel assembly with nuclear fuel rods with varying fuel cladding thickness in each of the reactor core regions

Abstract

A liquid-metal cooled fast reactor core having a nuclear fuel assembly constituted of nuclear fuel rods with varying cladding thicknesses in reactor core regions, in which: the nuclear fuel assembly () of a liquid-metal cooled fast reactor includes nuclear fuel assemblies (and) in inner, middle and outer reactor core regions, respectively, and is installed in a hexagonal duct () with nuclear fuel materials (--and-) surrounded by respective claddings (--and-), and the claddings (--and-) of a nuclear fuel rod () in the inner reactor core region, a nuclear fuel rod () in the middle reactor core region and a nuclear fuel rod () in the outer reactor core region are formed at different thicknesses. The reactor core can flatten power distribution using a single-enrichment nuclear fuel in the liquid-metal cooled fast reactor.