05000282/FIN-2015002-02
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Finding | |
|---|---|
| Title | Failure to Correct #12 Battery Nonconformance |
| Description | The inspectors identified a finding of very low safety significance and an associated NCV of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, for the licensees failure to promptly correct a condition adverse to quality. Specifically, the licensee failed to correct a non-conforming issue for the #12 battery that was discovered in February 2011. The inspectors determined that the failure to correct the non-conformance in a timely manner was contrary to 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, and was a performance deficiency. The finding was more than minor because it was associated with the Mitigating Systems cornerstone attribute of Equipment Performance and affected 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 licensee did not take timely corrective actions to resolve the #12 battery non-conformance. Additionally, no corrective action was taken to correct the occurrence of the inverters AC circuit breakers tripping of the normal load and becoming an additional load on to the DC system; thereby causing the battery to be non-conforming. In accordance with Inspection Manual Chapter (IMC) 0609, Significance Determination Process, Attachment 0609.04, Initial Characterization of Findings, issued June 19, 2012, and Appendix A, The Significance Determination Process for Findings At-Power, Exhibit 2, Mitigating Systems Screening Questions, issued June 19, 2012, the inspectors answered No to all of the questions. The inspectors confirmed that the finding did not result in a loss of operability or functionality per IMC 0326, Operability Determination & Functionality Assessments for Conditions Adverse to Quality or Safety, since the capacity of the battery had been tested above the 88.5 percent capacity factor per battery calculation and evaluation. Therefore, this finding was of very low safety significance (Green). The inspectors determined the finding was cross-cutting in the Problem, Identification and Resolution, Resolution area because of the licensees failure to implement effective corrective actions to restore operability of the #12 battery. |
| Site: | Prairie Island  |
|---|---|
| Report | IR 05000282/2015002 Section 4OA2 |
| Date counted | Jun 30, 2015 (2015Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | A Shaikh J Corujo-Sandin K Riemer K Stoedter L Haeg L Kozak M Jeffers M Phalen N Feliz-Adomo P Laflamme |
| Violation of: | 10 CFR 50 Appendix B Criterion XVI |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
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Finding - Prairie Island - IR 05000282/2015002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Prairie Island) @ 2015Q2
Self-Identified List (Prairie Island)
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