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Lead +  and Magnesium +

10 CFR 50 +, 10 CFR 50.36 +, 10 CFR 50 Appendix J +, 10 CFR 50.59 +, 10 CFR 50.55a +, 10 CFR 50.59#c1 +, 10 CFR 50.55a#z +, 10 CFR 50.55a#b3xi +  and 10 CFR 50.55a#b3ii +

Barrier Integrity +, Initiating Events +  and Mitigating Systems +

ML15142A761 +, Information Notice 2017-03, Anchor/Darling Double Disc Gate Valve Wedge Pin and Stem-Disc Separation Failures +, Information Notice 2012-14, Motor-Operated Valve Inoperable Due to Stem-Disc Separation +, ML061280315 +, ML082480638 +, NRC Generic Letter 1979-46 +, ML112580358 +, ML063490194 +, ML20038A207 +, ML20338A012 +, ML21047A290 +, ML21041A409 +, ML20220A667 +, ML19351E131 +, ML21334A168 +, ML23018A081 +, Information Notice 2021-01, Lessons Learned from U.S. Nuclear Regulatory Commission Inspections of Design-Basis Capability of Power-Operated Valves at Nuclear Power Plants +, ML20202A473 +  and ML21061A265 +

Russell Felts +  and NRC/NRR/DRO +

NRC Generic Letter 96-05, Periodic Verification of Design-Basis Capability of Safety-Related Motor-Operated Valves +  and NRC Generic Letter 79-46, Containment Purging and Venting During Normal Operation – Guidelines for Valve Operability +

Information Notice 2021-01, Lessons Learned from U.S. Nuclear Regulatory Commission Inspections of Design-Basis Capability of Power-Operated Valves at Nuclear Power Plants +, Information Notice 2021-01, Lessons Learned from U.S. Nuclear Regulatory Commission Inspections of Design-Basis Capability of Power-Operated Valves at Nuclear Power Plants +, Information Notice 2021-01, Lessons Learned from U.S. Nuclear Regulatory Commission Inspections of Design-Basis Capability of Power-Operated Valves at Nuclear Power Plants +, Information Notice 2021-01, Lessons Learned from U.S. Nuclear Regulatory Commission Inspections of Design-Basis Capability of Power-Operated Valves at Nuclear Power Plants +, Information Notice 2021-01, Lessons Learned from U.S. Nuclear Regulatory Commission Inspections of Design-Basis Capability of Power-Operated Valves at Nuclear Power Plants +  and Information Notice 2021-01, Lessons Learned from U.S. Nuclear Regulatory Commission Inspections of Design-Basis Capability of Power-Operated Valves at Nuclear Power Plants +

IP 71111.21N +, IP 71111, Reactor Safety-Initiating Events, Mitigating Systems, Barrier Integrity +  and IP 71111.21N.02 +

Information Notice 2017-03, Anchor/Darling Double Disc Gate Valve Wedge Pin and Stem-Disc Separation Failures +, Information Notice 2012-14, Motor-Operated Valve Inoperable Due to Stem-Disc Separation +, Information Notice 92-83 +  and Information Notice 2021-01, Lessons Learned from U.S. Nuclear Regulatory Commission Inspections of Design-Basis Capability of Power-Operated Valves at Nuclear Power Plants +

Russell Felts +, Douglas Bollock +, Thomas Scarbrough +  and Kenneth Kolaczyk +

Packing leak +, Stroke time +, Squib +, Incorporated by reference +, Power-Operated Valves +, Grace period +  and Weak link +