05000530/FIN-2009010-01
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Finding | |
|---|---|
| Title | Failure to Follow Foreign Material Exclusion Requirements |
| Description | The inspectors identified a noncited violation of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures and Drawings, for the failure to adequately implement foreign material controls during maintenance. Specifically, on May 21, 2008, maintenance and quality control personnel failed to ensure that no foreign material entered the fuel injection pump 7R during refurbishment. As a result, a degraded fuel injection pump 7R resulted in the failure of diesel generator 3A to successfully pass surveillance testing on February 4, 2009. This issue was entered into the licensees corrective action program as Palo Verde Action Request 3280474.The finding is more 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 analysis because the finding resulted in an actual loss of safety function of a single train for greater than its technical specification allowed outage time. Using the Palo Verde pre-solved sequences and an exposure time of 3 to 30 days with one emergency diesel generator unavailable, the Phase 2 estimation determined this finding was of low to moderate significance. With credit for battery operation for seven hours, the Phase 3 analysis determined that the total delta core damage frequency from all of the combined scenarios was 5 E-7; and thus, the finding was considered to be of very low safety significance (Green). This finding has a crosscutting aspect in the area of human performance associated with decision making because the licensee did not communicate bases for decisions to personnel with a need to know such that work is performed safely, in a timely manner H.1(c |
| Site: | Palo Verde  |
|---|---|
| Report | IR 05000530/2009010 Section 4OA2 |
| Date counted | Sep 30, 2009 (2009Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | R Treadway M Hay M Runyan D Proulx |
| CCA | H.10, Bases for Decisions |
| INPO aspect | CO.2 |
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Finding - Palo Verde - IR 05000530/2009010 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palo Verde) @ 2009Q3
Self-Identified List (Palo Verde)
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