HYBRID NUCLEAR REACTOR WITH SEPARABLE CORE

The present invention provides a core separation type hybrid reactor capable of realizing the same output operation as a conventional reactor with a single reactor or as a critical facility. When used as a critical facility, a grid of the reactor constituent material is loaded in a space for a portion of the separation core that is laterally moved to form a critical test space therebetween, thereby performing a grid characteristic experiment. The reactor includes a core separation type mixed reactor 100 provided inside the concrete water tank 10, and a mode switching driving section 20 for adjusting the operation mode of the hybrid reactor 100, and the core separation type mixed reactor 100, comprising: a lattice structure 130 of a separate structure disposed on a bottom surface portion of the concrete water tank 10; a reflector structure 150 of a separate type structure disposed at an edge portion of the grid structure 130; and a type partition wall structure 170 in which the reflector structure 150 is surro