05000483/FIN-2010006-01
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Finding | |
|---|---|
| Title | Failure to Correct Degraded Conditions in Essential Service Water System in a Timely Manner |
| Description | The team identified a noncited violation of 10 CFR Part 50, Appendix B, Criterion XVI, for the licensees failure to correct in a timely manner degraded conditions affecting the essential service water system. Specifically, the licensee failed to resolve the combined effects of corrosion and waterhammer events resulting in system leaks. The licensee has experienced the waterhammer events since initial plant startup and has been experiencing problems with corrosion since the mid-1990s. As corrective actions for this issue, the licensee plans to implement two system modifications next refueling outage to mitigate the impacts of waterhammer events. This noncited violation was entered into the corrective action program as Callaway Action Request 201010635. The issue was more than minor because it affected the equipment performance attribute of the Mitigating Systems Cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Using Manual Chapter 0609.04, Phase 1 Initial Screening and Characterization of Findings, the issue is determined to have very low safety significance because the finding is not a design or qualification issue confirmed not to result in a loss of operability or functionality; did not represent an actual loss of safety function of the system or train; did not result in the loss of one or more trains of nontechnical specification equipment; and did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. The inspectors determined that the cause of the finding has a crosscutting aspect in the area of human performance associated with the component of resources because the licensee did not maintain the plant to minimize long-standing equipment issues. |
| Site: | Callaway  |
|---|---|
| Report | IR 05000483/2010006 Section 4OA2 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | P Goldberg M Hay J Groom J Rollins Z Hollcraft |
| CCA | H.6, Design Margins |
| INPO aspect | WP.2 |
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Finding - Callaway - IR 05000483/2010006 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Callaway) @ 2010Q4
Self-Identified List (Callaway)
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