05000348/FIN-2014007-06
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Finding | |
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Title | Inadequate Characterization of IST Program Valves |
Description | The team identified a Green non-cited violation of 10 CFR 50.55a(f), Inservice testing requirements, subsection (4), American Society of Mechanical Engineers Operation and Maintenance of Nuclear Power Plants code, Subsection ISTC-1300, Valve Categories, for the licensees failure to categorize Unit 1 & 2 charging pump suction isolation valves (LCV115 B &D ), and Unit 1 & 2 refueling water storage tank (RWST) supply to charging header check valves (Q1/2E21V026) as Class A for which seat leakage is limited to a specific maximum amount in the closed position. Specifically, the licensees inservice testing program did not test safety-related valves to ensure they could perform their safety function in the closed direction and meet seat leakage requirements. The licensee entered the issue into their corrective action program as condition reports 823022 and 815699. A review of past pump data indicated the valve held against system pressure and would not allow a significant reverse flow. The team determined that failure of the licensee to properly categorize LCV115 B & D and QV026 in their inservice testing program to ensure they could perform their safety function was a performance deficiency. The performance deficiency was determined to be more than minor because it was associated with the Mitigating Systems cornerstone attribute of Design Control and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the licensee failed to properly categorize valves as Category A resulting in failure to leak test the valves to ensure reverse flow of containment sump water to the RWST did not result in exceeding the plants post accident dose rate limits. The team determined the finding was of very low safety significance (Green) because it was not a design deficiency resulting in the loss of functionality or operability. The team did not identify a cross-cutting aspect associated with this finding because it is not indicative of present licensee performance. |
Site: | Farley ![]() |
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Report | IR 05000348/2014007 Section 1R21 |
Date counted | Jun 30, 2014 (2014Q2) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.21 |
Inspectors (proximate) | D Mas E Stamm G Macdonald M Yeminy N Feliz Adorno R Nease S Kobylarz T Lighty |
Violation of: | 10 CFR 50.55a |
INPO aspect | |
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Finding - Farley - IR 05000348/2014007 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Farley) @ 2014Q2
Self-Identified List (Farley)
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