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Forwards suppl info re GL 95-07, "Pressure Locking & Thermal Binding of Safety Related Power Operated Gate Valves." Encl contains methodology used in determination of pressure locking susceptibility of PORVs block valves.

Accession Number: ML18107A331

Date Released: Thursday, November 29, 2018

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• ML18107A330 - Forwards suppl info re GL 95-07, "Pressure Locking & Thermal Binding of Safety Related Power Operated Gate Valves." Encl contains methodology used in determination of pressure locking susceptibility of PORVs block valves. (3 page(s), 5/24/1999)
• ML18107A332 - Rev 0 to 108-173-EJM-01, "Opening Force Required to Overcome Pressure Locking of Pressurizer Block Valves 1PR6,1PR7,2PR6 & 2PR7." (28 page(s), 8/29/1996)
• ML18107A335 - Rev 0 to 108-193-TW4, "Evaluation of MOVs PR6 & PR7 for Pressure Locking During Gradual Depressurization Event." (11 page(s), 1/27/1997)