05000424/FIN-2009004-01
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Finding | |
|---|---|
| Title | MOV Program Procedures Were Inadequate with Regard to Periodicity of Preventive Maintenance Activities for Stem Lubrication |
| Description | A self-revealing NCV of 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was identified. Specifically, Vogtle Electric Generating Plants (VEGP) MOV preventative maintenance (PM) procedures lacked specific instructions that provided an adequate frequency for performing valve stem lubrication, which resulted in test failures of safety-related MOVs and affected the reliability of the MOVs safety functions. The licensee removed the hardened grease, relubricated and successfully tested the MOVs. They have entered the issue into their corrective action program and are in the process of revising existing maintenance procedures to change the PM frequency from 54 months to 36 months for long stem, safety-related MOV stem lubrication. The finding was more than minor because if left uncorrected other safety related MOVs could be affected by the inadequate stem lubrication PM frequencies. The finding is associated with the configuration control attribute of the Barrier Integrity (BI) Cornerstone and affected the cornerstone objective of providing reasonable assurance that physical design barriers (e.g., containment) protect the public from radionuclide releases caused by accidents or events. Specifically, Containment Spray (CS) pump sump suction isolation MOVs experienced test failures and were declared inoperable, which required operability evaluations, thereby challenging their reliability and capability to perform their safety function. Using the Phase 1 worksheet in Attachment 4 of Manual Chapter 0609, Significance Determination Process, the finding affected the BI cornerstone and was of very low safety significance (Green) because it did not represent an actual open pathway in the physical integrity of reactor containment. Although the CS sump suction MOVs condition affected the mitigating system cornerstone, the finding analysis was assigned to the BI cornerstone because it best reflected the dominant risk of the finding. This finding has a cross-cutting aspect in the area of PI&R, Corrective Action Program, because VEGP did not thoroughly evaluate problems such that the resolutions addressed the causes and extent of condition P.1(c). Specifically, VEGP failed to thoroughly evaluate previous conditions of degraded and hardened grease on safety related valves, such that the extent of the condition was considered and the cause was resolved |
| Site: | Vogtle  |
|---|---|
| Report | IR 05000424/2009004 Section 4OA2 |
| Date counted | Sep 30, 2009 (2009Q3) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | A Nielsen G Kuzo G Laska M Cain T Chandler D Forbes L Mahlahla M Meeks S Shaeffer |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Vogtle - IR 05000424/2009004 | ||||||||||||||||||||||||||||||
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Finding List (Vogtle) @ 2009Q3
Self-Identified List (Vogtle)
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