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SODIUM FILTER PERFORMANCE IN THE NASCORD DATABASE

Sodium-cooled Fast Reactors (SFRs) have an extensive operational history that can be leveraged to accelerate the licensing process for advanced reactor designs. Sandia National Laboratories has reconstituted the United States SFR data from the Centralized Reliability Data Organization (CREDO) into a new database called the Sodium System Component Reliability Database (NaSCoRD). The NaSCoRD database and others like it will help reduce parametric uncertainties encountered in probabilistic risk analysis (PRA) models for advanced non-light water reactor technologies. This paper is an extension of previous work done at Sandia National Laboratories which analyzed pump data. This paper investigates the failure rates of filters/strainers. NaSCoRD contains unique records of 147 filters/strainers that have operated in Experimental Breeder Reactor II, Fast Flux Test Facility, and test loops including those operated by both Westinghouse and the Energy Technology Engineering Center. This paper presents filter failure rates for various conditions allowable from the CREDO data that has been recovered under NaSCoRD. The current filter reliability estimates are presented in comparison to estimates provided in historical studies. The impacts of the suggested corrections from the Idaho National Laboratory report, Generic Component Failure Data Base for Light Water and Liquid Sodium Reactor PRAs, and various prior distributions on these reliability estimates are also presented. The paper also briefly describes the potential improvement of the NaSCoRD database.