05000334/FIN-2011003-03
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Finding | |
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| Title | Defective Fuel Injection Pump Supply Lines Provided by the Diesel Engine Manufacturer Results in an Emergency Diesel Generator Being Inoperable |
| Description | On March 25, while Beaver Valley, Unit 2 was shut down in Mode 6 (refueling), scheduled maintenance was performed on the Train A EDG which included replacing the twelve fuel injection pump supply lines with new fuel injection pump supply lines procured from the EDG vendor. During post maintenance testing of the the Train A EDG, the supply line to the number four injector was replaced with its original supply line due to a small fuel leak (approximately 6 drops per minute). Several additional fuel supply line fittings were tightened to eliminate signs of minor leakage and the required post maintenance testing and endurance run of the Train A EDG was completed satisfactorily. After successful post maintenance testing, the Train A EDG was declared operable by the licensee and the Train B EDG was subsequently declared inoperable and removed from service for routine maintenance. Approximately 11 hours1.273148e-4 days <br />0.00306 hours <br />1.818783e-5 weeks <br />4.1855e-6 months <br /> later the vendor informed the licensee of its recommendation to remove all of the new fuel injection pump supply lines previously installed on the Train A EDG due to concerns over the adequacy of the assembly method of the fuel line compression fittings. Based on this vendor recommendation, the licensee immediately declared Train A EDG inoperable. Since both EDG trains wer inoperable for approximately 11 hours1.273148e-4 days <br />0.00306 hours <br />1.818783e-5 weeks <br />4.1855e-6 months <br />, during which time no action was immediately taken to restore one to operability as required by TS 3.8.2.B, the licensee was inadvertently in a condition prohibited by TS. When the licensee determined that both EDG trains were inoperable, they entered TS 3.8.2.B, initaed actions to restore one EDG to operable status, and evaluated the issue for reportability and appropriately issued LER 50-412/2011-001, defective fuel injection pump supply lines provided by the diesel engine manufacturer results in an emergency diesel generator being inoperable, dated may 19, 2011. This LER reported that Beaver Valley, unit 2 had been an a condition that was prohibited by TS 3.8.2.B, which requires immediate action if both trains of EDG are inoperble while in Mode 6 operatins. |
| Site: | Beaver Valley |
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| Report | IR 05000334/2011003 Section 1R05 |
| Date counted | Jun 30, 2011 (2011Q2) |
| Type: | Violation: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | T Moslak D Werkheiser R Bellamy C Crisden E Bonney T Ziev |
| INPO aspect | |
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Finding - Beaver Valley - IR 05000334/2011003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Beaver Valley) @ 2011Q2
Self-Identified List (Beaver Valley)
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