05000277/FIN-2011005-01
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Finding | |
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| Title | Untimely Corrective Action to Correct MOV Degraded Stem Lubrication |
| Description | The inspectors determined that Exelon\'s failure to promptly correct a condition adverse to quality associated with a safety-related motor-operated valve (MOV) constituted a Green, self-revealing NCV of 10 CFR Part 50, Appendix B, Criterion XVl, Corrective Action. Specifically, corrective actions to prevent recurrence of MOV program testing failures due to degraded stem lubrication in 2009 were not performed in a timely manner to prevent the inoperability of a safety-related MOV due to degraded lubrication, as identified on September 22, 2011. PBAPS entered this issue into the CAP via issue reports (lRs) 1266600 and 1266604. This finding was more than minor because it was associated with the configuration control attribute of the Barrier Integrity (Bl) cornerstone and affected the cornerstone objective of providing reasonable assurance that physical design barriers protect the public from radionuclide releases caused by accidents or events. Specifically, the Unit 3 reactor water cleanup (RWCU) outboard isolation valve MO-3-12-018 did not develop sufficient thrust at the torque switch trip setpoint during diagnostic testing on September 22, 2011. The RWCU MOV would not have been able to perform its safety function to close during the most limiting design condition. Using the Phase \'1 worksheet in Appendix 4 of IMC 0609, SDP, the finding affected the Bl cornerstone and was of very low safety significance (Green) because it did not represent an actual open pathway in the physical integrity of containment. This finding had a cross-cutting aspect in the area of Problem ldentification & Resolution (PI&R), CAP, because Exelon did not take appropriate corrective actions to address the adverse trend of degraded stem lubrication on a safety-related MOV in a timely manner |
| Site: | Peach Bottom  |
|---|---|
| Report | IR 05000277/2011005 Section 1R12 |
| Date counted | Dec 31, 2011 (2011Q4) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | E Miller J Tomlinson K Young P Krohn R Nimitz S Barr S Hansell A Ziedonis |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
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Finding - Peach Bottom - IR 05000277/2011005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Peach Bottom) @ 2011Q4
Self-Identified List (Peach Bottom)
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