05000261/FIN-2013004-01
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Finding | |
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| Title | |
| Description | The inspectors identified a Green non-cited violation (NCV) of 10 CFR 50.65(a)(2) for the licensees failure to demonstrate that the performance of the B Emergency Diesel Generator (EDG) ventilation recirculation damper was effectively controlled through appropriate preventive maintenance (PM) or monitored as specified in 10 CFR 50.65(a)(1), such that the ventilation system remained capable of performing its intended function. The lack of PM on the B EDG recirculation damper led to its failure and resulted in the B EDG being declared inoperable on May 1, 2013. Following the discovery of this issue, operations declared the B EDG inoperable and took immediate corrective actions to close the damper. This issue was entered in the licensees corrective action program as NCR 60433. The performance deficiency was determined to be more than minor because it was associated with the equipment performance attribute of the Mitigating Systems Cornerstone and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the failure to perform appropriate preventive maintenance on the B EDG ventilation recirculation damper resulted in its failure and on May 1, 2013, the B EDG was declared inoperable. Failure of the B EDG ventilation recirculation damper could allow the EDG room design limit temperature of 130F to be exceeded. Using IMC 0609, Appendix A, issued June 19, 2012, The SDP for Findings At - Power, the inspectors determined that this finding is of very low safety significance (Green) because the finding did not represent an actual loss of function of one or more non-Tech Spec Trains of equipment designated as high safety - significant in accordance with the licensees maintenance rule program for greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. This finding had a cross-cutting aspect in the Operating Experience component of the Problem Identification and Resolution area, because the licensee failed to incorporate lessons learned from a similar event, which occurred in 2012 at the Clinton Power Station, into the preventive maintenance program. |
| Site: | Robinson  |
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| Report | IR 05000261/2013004 Section 1R12 |
| Date counted | Sep 30, 2013 (2013Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | C Scott G Hopper K Ellis M Bates R Williams |
| Violation of: | 10 CFR 50.65(a)(1) 10 CFR 50.65(a)(2) 10 CFR 50.65 |
| CCA | P.5, Operating Experience |
| INPO aspect | CL.1 |
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Finding - Robinson - IR 05000261/2013004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Robinson) @ 2013Q3
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