05000397/FIN-2013007-06
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Finding | |
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| Title | Failure to Analyze the Effect of System, Test Source, and Transient Harmonics on Proper Operation of Undervoltage Relays |
| Description | The team identified a Green non-cited violation of 10 CFR 50, Appendix B, Criterion III, Design Control, which states in part, that design control measures shall provide for verifying or checking the adequacy of design, such as by the performance of design reviews, by the use of alternate or simplified calculation methods, or by the performance of a suitable testing program. Specifically, prior to August 22, 2013, the licensee failed to assess the cumulative effects of the 4160 Vac system, test source, and transient harmonics on the secondary level undervoltage relays. This violation was entered into the licensees corrective action program as Action Requests 291665 and 292405. The violation did not present an immediate safety concern. The licensees failure to analyze the cumulative effect of electrical system, test source, and transient harmonics on the secondary level undervoltage relays was a performance deficiency. The performance deficiency was more than minor, and therefore a finding, because it was associated with the design control attribute of the Mitigating Systems cornerstone and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, failure to analyze the cumulative effect of electrical harmonics on the secondary level undervoltage relays would have the potential to cause the relays to fail to actuate at the setpoints specified in technical specifications. Using the Manual Chapter 0609, Appendix A, Exhibit 2, the team determined the finding is of very low safety significance (Green), because the finding was confirmed to be a qualification deficiency that did not affect the functionality of the undervoltage relays. This finding did not have a crosscutting aspect because the most significant contributor to the performance deficiency did not reflect current licensee performance. |
| Site: | Columbia  |
|---|---|
| Report | IR 05000397/2013007 Section 1R21 |
| Date counted | Sep 30, 2013 (2013Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21 |
| Inspectors (proximate) | T Buchanan T Martinez Navedo W Smith G Replogle J Braisted M Yeminy S Kobylarz |
| Violation of: | 10 CFR 50 Appendix B Criterion III, Design Control Technical Specification |
| INPO aspect | |
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Finding - Columbia - IR 05000397/2013007 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Columbia) @ 2013Q3
Self-Identified List (Columbia)
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