| 摘要 |
PROBLEM TO BE SOLVED: To provide a fast reactor core and a fast reactor comprising the core, capable of suppressing increase of reactivity and having higher safety, even when void reactivity is reduced due to a voided coolant and a control rod is not inserted.SOLUTION: A core 20 is a fast reactor core in which plural core fuel assemblies 110 including fissile material, and a hydride moderator assembly 30A as a hydride assembly including hydride or a hydride absorber assembly 30B is disposed adjacent to at least part of the plural core fuel assemblies 110, and on an outer peripheral part of the plural core fuel assemblies 110. |
