05000482/FIN-2009004-06
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Finding | |
|---|---|
| Title | Performing Prohibited Elective Maintenance on Safety Bus NB02 Channel 4 During Emergency Diesel Generator Maintenance |
| Description | The inspectors identified a noncited violation of Technical Specification 3.8.1, Required Action B.4.2.2 on March 24, 2009 when the licensee performed elective maintenance on safety bus relays and removed equipment from service that was required by the technical specification and the NRC Safety Evaluation Report (SER) while in an extended diesel generator outage. The maintenance had the potential to open the normal offsite feeder breaker. This issue has been entered into the corrective action program as Condition Report 15727. The inspectors determined that the failure to implement requirements of Technical Specification 3.8.1 and the associated NRC safety evaluation was a performance deficiency. The finding was more than minor because it is associated with the equipment performance attribute for the Mitigating Systems Cornerstone and affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). The finding was determined to be of very low safety significance because the issue did not result in the Train B offsite power being inoperable for greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and did not involve external events such as flooding. Additionally, the cause of the finding has a problem identification and resolution crosscutting aspect in the area associated with the corrective action program. Specifically, Wolf Creek did an extent of condition review in response to a previous violation which included Procedure STS IC-208B, but still failed to prohibit performance of STS IC-208B during the 7-day diesel outages P.1(c) |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2009004 Section 1R19 |
| Date counted | Sep 30, 2009 (2009Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | C Long C Peabody C Ryan G Apger G Miller G Tutak J Adams P Jayroe S Alferinkc Longc Peabody G Miller G Werner M Shannon N O'Keefe P Jayroe R Kellar S Garchow |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Wolf Creek - IR 05000482/2009004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2009Q3
Self-Identified List (Wolf Creek)
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