Study on Passive Residual Heat Removal System (PRHRS) performance of System-Integrated Advanced Modular Reactor (SMART)

SMART (System-Integrated Advanced Modular Reactor) is a Generation III+ multifunctional SMR (Small Modular Reactor) design developed by KAERI (Korean Atomic Energy Research Institute) with the capability of 107 MWe electric generation and 365 MWt thermal energy. The SMART system comprises various safety features to prevent LOCA (Loss of Coolant Accident) and other accident scenarios. One of the features is Passive Residual Heat Removal System (PRHRS), which works without any electric source. This system works according to the natural circulation principle and thus depends on the thermal aspect, pressure aspect, and its influence on mass flow rate. These three aspects can affect the heat removal capability of the system. PRHRS performance data of SMART in several accident conditions, which are acquired through thermal-hydraulic experimental and simulation studies, are analyzed and studied in this paper. Results of the analysis show a well-desired heat removal performance of SMART PRHRS with punctual actuation and stable decrease of coolant temperature and pressure. With multi-function capability and decent cooling performance, SMART has a high potential to be implemented in Indonesia in the near future. (author)