Prerequisite for Adopting a Passive Safety System with a Safeguard Vessel for SMART

Owing to its native characteristics, the application area of the Small and Medium sized Reactors (SMR) can be easily expanded to a non-electricity field such as a sea water desalination and a district heating. SMRs have beneficial advantages of a reactor safety and economics by an easy implementation of advanced design concepts and technology. SMART, a small sized integral type PWR with a rated thermal power of 330 MWt is one of the advanced SMR. Major components of the reactor coolant system such as the pressurizer, reactor coolant pump, and steam generators are located inside the reactor vessel. The SMART can fundamentally eliminate the possibility of large break loss of coolant accidents, improve the natural circulation capability, and better accommodate and thus enhance a resistance to a wide range of transients and accidents