The NRC began its first reassessment of PWR sump and BWR suction strainer performance in 1979. The first reassessment (including all technical and regulatory actions) was completed in 1985.
In 1992, the NRC started a second reassessment of BWR suction strainer performance and completed the reassessment (including all technical and regulatory actions) in 2000.
In 1996, the NRC started a second reassessment of PWR sump performance and that reassessment is ongoing.
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Page Last Reviewed/Updated Wednesday, March 11, 2020