Mathematical dynamic modeling and thermal-hydraulic analysis of HANARO

This paper describes the development of a dynamic model of HANARO (High-Flux Advanced Neutron Application Reactor), an open tank in pool type research reactor. The reliable dynamic model of the reactor and its cooling systems is developed to perform the thermal-hydraulic analysis for transients. The developed dynamic model is properly implemented in the transient simulation code, H-SIM, which is compiled and executed on a personal computer (PC) using the DESIRE simulation language. The H-SIM is intended for simulating efficiently the operational characteristics and the thermal-hydraulic behavior of HANARO for many transients. The simulation for HANARO transients shows a proper thermal-hydraulic behavior trend for the power step change. Results from the H-SIM with reference calculations are found in general to be very encouraging and the dynamic model is judged to be versatile to fulfill its intended purpose.