05000293/FIN-2009002-01
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Finding | |
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| Title | Failure to Establish and Maintain Adequate Design Measures to Monitor Critical Parameters of the EDG Air Start System |
| Description | The inspectors identified a non-cited violation (NCV) of very low safety significance of 10 CFR Part 50, Appendix B, Criterion III, Design Control, because Entergy personnel did not establish and maintain measures to monitor critical design parameters to assure that equipment and processes essential to the safety-related function of the emergency diesel generator (EDG) air start system were adequate. Specifically, Entergy did not establish adequate measures to assure that an adequate supply of air was available to the air receivers for a minimum of two cold engine starts without recharging. This resulted in the A EDG being inoperable on March 8, 2009.Entergy entered this issue into their corrective action program (CAP) for resolution asCR-PNP-2009-00807. The immediate corrective actions included establishing compensatory requirements to increase the monitoring frequency for the air start system critical parameters. This finding is more than minor because it is associated with the design control attribute of the Mitigating Systems cornerstone and affects the cornerstone objective to ensure the reliability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). Specifically, the finding affected the reliability of the EDG to ensure a minimum of two cold engine starts without recharging to help mitigate the consequences of design basis events. The inspectors determined that the finding is of very low safety significance (Green) because it is not a design or qualification deficiency, did not represent a loss of safety function, and did not screen as potentially risk significant due to external events. There is no cross-cutting aspect identified for this finding because the inspectors determined that the performance deficiency is not reflective of current plant performance. The monitoring frequencies of the EDG air start system critical parameters were established for an extended period and prior to this problem there had not been recent issues with monitoring EDG air start capability |
| Site: | Pilgrim |
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| Report | IR 05000293/2009002 Section 1R12 |
| Date counted | Mar 31, 2009 (2009Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | M Davis M Gray B Smith M Schneider |
| INPO aspect | |
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Finding - Pilgrim - IR 05000293/2009002 | |||||||||||||||||||||||||
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Finding List (Pilgrim) @ 2009Q1
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