Safety-related equipment prioritization for reliability centered maintenance purposes based on a plant specific level 1 PSA

Importance measures are widely used for multiple purposes concerning safety improvement of nuclear power plants (NPPs). This paper proposes a new approach for performing the safety-related equipment prioritization for reliability centered maintenance purposes that considers two measures of risk importance of components based on a simplified Core Damage Frequency model derived from the plant specific level 1 PSA. It is also included the case of application to the Residual Heat Removal System (RHRS) at the Confrentes NPP in Spain.