Requirements and approaches to BN-1200 safety provision

BN-1200 design should meet the following safety requirements: • Current regulatory safety requirements for operating nuclear power plants; • Core damage frequency should not exceed 10^-6 1/reactor·year; • Large early release frequency should not exceed 10^-7 1/reactor·year; • Elimination of accidents with consequences requiring the need for offsite public evacuation. In any technically credible situation, the following requirements must be implemented: • Removal of decay heat generated by the reactor while maintaining its structural integrity; • Localization of the majority of radioactive products escaping from the reactor in the event of potential accidents within a special above-reactor premise; • The reactor should go subcritical while maintaining acceptable temperature conditions of its components. Implementation of all of these requirements should ensure achievement of the objective of precluding offsite public evacuation