Performance characteristics of flow circulation system in HANARO flow simulation facility

The HANARO, multi-purpose research reactor, 30 MWth open-tank-in-pool type, has been under normal operation since its initial criticality in February, 1995. Many experiments should be safely performed to activate the utilization of the HANARO. For this purpose, a HANARO flow simulation facility with similar flow characteristics to the HANARO has been installed to verify the structural integrities and to predict the performances for those experimental facilities prior to loading in the HANARO. This facility is composed of a half-core structure assembly, a flow circulation system and a support system. The flow circulation system should supply the core flow and the core bypass flow to the half-core structure assembly loaded flow orifices instead of nuclear fuels to simulate a similar flow characteristic to the HANARO. In this paper, we describe the performance characteristics for the circulation system. As results, it was confirmed through the field performance test that the flow circulation system supply the core flow and the core bypass flow to be satisfied the design requirements