Abstract
Probabilistic risk assessment (PRA) based inspection guidance has been developed using information from the PRA for Arkansas Nuclear One Unit 1 (ANO-1). An analytical method was developed for calculating risk importance for affected plant systems. This was used to prioritize the ANO-1 plant systems using the Fussel-Vesely importance measure on the basis of core melt probability. System fault trees were reanalyzed to identify and rank the risk significant components in each system. The product of this effort is a prioritized listing of systems and components associated with 98% of the inspectable portion of the risk from ANO-1.
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