SMART behavior under over-pressurizing accident conditions

SMART (System-integrated Modular Advanced ReacTor) is an integral reactor o f 330 MW capacity with passive safety features under development in Korea. The design is developed by combining the firmly-established commercial reac tor technologies with new and advanced technologies such as industry proven KOFA (Korea Optimized Fuel Assembly) based nuclear fuels, self-pressurizin g pressurizer, helically coiled once-through steam generators, and new cont rol concepts. The design of SMART focuses on enhancing the safety and relia bility of the reactor by employing inherent safety features such as low cor e power density, elimination of large break loss of coolant accident, etc. In addition, in order to prevent the progression of emergency situations in to accidents, the SMART is provided with a number of engineered safety feat ures such as Passive Residual Heat Removal System, Passive Emergency Core C ooling System? Safeguard Vessel, and Passive Containment Over-Pressure Prot ection System. This paper presents an overview of the SMART design, charact eristics of it's safety systems, and results of over-pressure accident anal yses. The results of the accident analyses show that the SMART provides the inherent over-pressure protection capability for design basis accidents wi thout actuation of any protection devices such as safety valves, rupture di sks, etc. (C) 2000 Elsevier Science S.A. All rights reserved.