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Responds to 810311 ltr re recent testing performed by EPRI on closure of block valves used on PWRs for isolation of power operated relief valves.Analyses performed after TMI-2 show all plants can be safely shut down w/open valves.

Accession Number: ML19248B900

Date Released: Thursday, October 24, 2024

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• ML19305F539 - Responds to 810311 ltr re recent testing performed by EPRI on closure of block valves used on PWRs for isolation of power operated relief valves.Analyses performed after TMI-2 show all plants can be safely shut down w/open valves. (8 page(s), 9/4/1981)
• ML19305F540 - Informs that Commission approved encl ltr re testing of power operated relief valves for signature.W/o encl. (1 page(s), 8/28/1981)