05000324/FIN-2010004-01
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Finding | |
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| Title | Failure to Correct a Condition Adverse to Quality Involving Corrosion-Related Failures in the Emergency Diesel Generator Starting/Control Air System |
| Description | The inspectors identified a Green NCV of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, for failure to promptly correct a condition adverse to quality regarding moisture and corrosion buildup in carbon steel components used in the emergency diesel generator (EDG) starting/control air systems, leading to EDG starting/control air components experiencing ongoing failures due to moisture-related corrosion buildup. The licensee has initiated NCR 424932 and new corrective actions are currently being developed. The inspectors determined that the licensees failure to take adequate corrective actions for the corrosion buildup in the carbon steel components used in the EDG starting/control air system was a performance deficiency. The inspectors determined that the finding is more than minor because if left uncorrected, the issue would become a more significant safety concern in that the potential exists for an EDG failure. This issue is associated with the equipment performance attribute of the Mitigating Systems cornerstone and adversely affects the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). Specifically, the corrosion buildup in the carbon steel components used in the EDG starting/control air system due to moisture has adversely affected the reliability of the EDGs. This finding was evaluated using Inspection Manual Chapter 0609, Significance Determination Process, Phase 1 Worksheet for mitigating systems. The finding was determined to be of very low safety significance (Green) because the degraded condition did not actually result in the loss of the EDG system safety function or the loss of function of a single EDG. This finding has a cross-cutting aspect in the Corrective Action Program (CAP) component of the Problem Identification and Resolution area because the licensee did not take appropriate corrective action to address safety issues and adverse trends in a timely manner, commensurate with their safety significance and complexity, in that the licensee did not promptly correct the adverse condition of corrosion products in the EDG starting/control air system. (P.1(d)) |
| Site: | Brunswick  |
|---|---|
| Report | IR 05000324/2010004 Section 1R12 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | A Nielsen R Musser G Kolcum |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
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Finding - Brunswick - IR 05000324/2010004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Brunswick) @ 2010Q3
Self-Identified List (Brunswick)
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