05000259/FIN-2014003-03
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | 10 CFR 50, Appendix B, Criterion XI, Test Control, required in part that testing demonstrated that components perform satisfactorily in service and that test procedures incorporate the requirements and acceptance limits contained within applicable design documents. On May 4, 2012, modification DCN 69492, Stage 7 was implemented which replaced the 480V Shutdown Board 3A Normal Feeder Breaker (BFN-3-BKR-231-0003A/1C) with an updated model. Contrary to the above, breaker checkout and testing procedure, (ECI-0-000-BKR011), did not test all the required design functions of the newly installed breaker, specifically the secondary contact circuitry which provides control for the load shed function. Subsequent testing on February 17, 2014, of the Emergency Diesel Generator (EDG) in accordance with Surveillance 3-SR-3.8.1.9(3A), EDG Load Acceptance Test, identified that the 480V Shutdown Board 3A failed to load shed as designed. The licensee entered this issue into the CAP as problem evaluation report (PER) 847155. Troubleshooting determined the failure of the load shed function was due to a lack of continuity or adequate engagement of the breakers secondary control contacts. Using inspection manual chapter 0609, Appendix A, Exhibit 2 (Mitigating Systems); this finding was determined to be of very low safety significance (green) because the EDG remained capable of meeting its design function even with the additional load induced by the failure of the 480V load shed function. |
| Site: | Browns Ferry  |
|---|---|
| Report | IR 05000259/2014003 Section 4OA7 |
| Date counted | Jun 30, 2014 (2014Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Nielsen C Fontana C Kontz D Dumbacher J Bartley L Pressley R Kellner S Sanchez T Stephen |
| Violation of: | 10 CFR 50 Appendix B Criterion XI |
| INPO aspect | |
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Finding - Browns Ferry - IR 05000259/2014003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Browns Ferry) @ 2014Q2
Self-Identified List (Browns Ferry)
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