05000482/FIN-2013003-03
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Finding | |
|---|---|
| Title | Diesel Generator Pressure Switch Failed Due to Instrument Line Pressure Oscillations |
| Description | A self-revealing non-cited violation of 10 CFR Part 50 Appendix B, Criterion XVI, Corrective Action, was identified on March 13, 2013. Specifically, the licensee replaced a jacket water pressure transmitter ten times, but failed to correct pressure oscillations that caused a fatigue failure of a pressure switch diaphragm, which rendered emergency diesel generator B inoperable. The inspectors concluded that the licensee ineffectively focused on correcting the apparent source of the pressure oscillations, but failed to evaluate the effects of the pressure cycles on components exposed to the same oscillations. This issue was entered into the licensees corrective action program as Condition Report 65624. Failure to analyze the effects of pressure oscillations in the emergency diesel jacket water system on interfacing system components is a performance deficiency. The performance deficiency is 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 Inspection Manual Chapter 0609 Appendix A, Significance Determination Process for Findings At Power, and determined that the finding screens as very low safety significance (Green) because the finding does not meet any criteria outlined in the Exhibit 2, Section A. Specifically the finding did not represent a loss of system safety function and did not exceed its technical specification allowed outage time of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. The inspectors determined that the finding had a cross-cutting aspect in the area of problem identification and resolution evaluations because the licensee failed to ensure that issues that potentially affect nuclear safety are fully evaluated and addressed in a timely manner. |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2013003 Section 4OA3 |
| Date counted | Jun 30, 2013 (2013Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | B Correll C Hunt C Peabody C Speer J O'Donnell L Ricketson M Bloodgood M Williams N O'Keefe R Kopriva |
| Violation of: | 10 CFR 50 Appendix B Criterion XVI Technical Specification |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Wolf Creek - IR 05000482/2013003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2013Q2
Self-Identified List (Wolf Creek)
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