05000528/FIN-2014002-06
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | Title 10 CFR 50, Appendix B, Criterion XVI, Corrective Action, requires, in part, that conditions adverse to quality, such as failures, malfunctions, deficiencies, deviations, defective material and equipment, and nonconformances are promptly identified and corrected. Contrary to the above, prior to November 15, 2013, the licensee failed to correct a condition adverse to quality. Specifically, on October 9, 2013, the licensee found foreign material in one of the Unit 3 steam generators. The licensee determined the material to be from an uncaptured Flexitallic gasket in the feedwater system. This material resulted in a wear scar on a steam generator tube, and as a result the affected tube was plugged. On December 12, 2006, the licensee discovered foreign material in a Unit 2 steam generator. That material required plugging of the tube, and was also from Flexitallic gaskets in the feedwater system. The licensees apparent cause evaluation for the 2006 event identified that the use of uncaptured Flexitallic gaskets was the source of the foreign materials. The cause evaluation assigned no corrective action to replace these gaskets with a captured design that minimizes the potential for foreign material generated from the gaskets. The licensee entered the issue into the corrective action program as Condition Report Disposition Request 4466275 and initiated corrective actions to replace the non-captured gaskets with captured caskets. The inspectors used the NRC Inspection Manual Chapter 0609, Appendix A, The Significance Determination Process for Findings At-Power, and concluded that the finding is of very low safety significance (Green) because the finding did not involve a degraded steam generator tube condition where one tube could not sustain 3 times the differential pressure across a tube during normal full power, steady state operation, and because the steam generators did not violate accident leakage performance criterion. |
| Site: | Palo Verde  |
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| Report | IR 05000528/2014002 Section 4OA7 |
| Date counted | Mar 31, 2014 (2014Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | B Parks D Reinert G Guerra J O 'Donnell L Carson M Baquera T Brow |
| Violation of: | 10 CFR 50 Appendix B Criterion XVI |
| INPO aspect | |
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Finding - Palo Verde - IR 05000528/2014002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palo Verde) @ 2014Q1
Self-Identified List (Palo Verde)
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