05000528/FIN-2009004-02
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Finding | |
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Title | Failure to Correct a Condition Adverse to Quality with the Emergency Diesel Generator Train B Fuel Oil Transfer Pump in a Timely Manner |
Description | A self-revealing noncited violation of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, was identified for the failure of maintenance personnel to promptly identify and correct a deficiency associated with the Unit 2emergency diesel generator train B fuel oil transfer pump. Specifically, in December of 2004 Unit 3 train A diesel fuel oil transfer pump failed due to water intrusion through electrical conduit. During an extent of condition review water was also found to affect Unit 2 train B transfer pump. Due to ineffective corrective actions, on April 22, 2009 Unit 2 train B diesel fuel oil transfer pump failed due to the effects of water intrusion causing an electrical short to ground. This issue was entered into the licensees corrective action program as Palo Verde Action Request 3385257.The finding is greater than minor because it is associated with the equipment performance attribute of the Mitigating Systems Cornerstone and affects the cornerstone objective of ensuring the reliability of systems that respond to initiating events to prevent undesirable consequences. Using Manual Chapter 0609.04, Phase 1 Initial Screening and Characterization of Findings, the finding was determined to require a Phase 2 and Phase 3 analysis by a senior reactor analyst, because the finding resulted in an actual loss of safety function of a single train for greater than its technical specification allowed outage time. Based on the analysis performed, the analyst concluded that the finding had very low safety significance because the fuel oil transfer pump was capable of performing a majority of its intended safety function resulting in a core damage frequency of approximately 1.7E-7. This finding was evaluated as not having a crosscutting aspect because the performance deficiency is not indicative of current performance |
Site: | Palo Verde ![]() |
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Report | IR 05000528/2009004 Section 4OA2 |
Date counted | Sep 30, 2009 (2009Q3) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | Self-revealing |
Inspection Procedure: | IP 71152 |
Inspectors (proximate) | R Treadway J Melfi M Hay J Bashore M Catts |
INPO aspect | |
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Finding - Palo Verde - IR 05000528/2009004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palo Verde) @ 2009Q3
Self-Identified List (Palo Verde)
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