05000269/FIN-2011018-01
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Finding | |
|---|---|
| Title | Installation of Non-Qualified SSF Pressurizer Heater Breakers Impacting Operability During Certain SSF-Credited Events |
| Description | An NRC-identified preliminarily greater than Green Apparent Violation (AV) of 10 CFR 50, Appendix B, Criterion III, Design Control, was identified for the licensees failure to install Standby Shutdown Facility (SSF) pressurizer heater breakers that were qualified for expected environmental conditions inside of containment during design basis events. The licensee installed replacement breakers and the SSF declared operable without testing to support that the replacement breakers would function under elevated containment temperatures. The failure to maintain design control of the SSF was a performance deficiency (PD). The PD was more than minor because it was associated with the Mitigating Systems Cornerstone attribute of Design Control and adversely affected the cornerstone objective in that failure to maintain equipment qualification did not provide reasonable assurance that the SSF Auxiliary Service Water (ASW) subsystem would perform its safety function. The finding was assessed using IMC 0609, Attachment 4, and determined that a Phase III analysis was required because the finding involved the loss or degradation of equipment designed to mitigate external initiating events. Therefore, the significance of this finding is to be determined (TBD). This finding had a cross-cutting aspect in the area of Human Performance under the Procedural Compliance aspect of the Work Practices component in that the licensee failed to follow the requirements set forth in EDM 601, Engineering Change. |
| Site: | Oconee  |
|---|---|
| Report | IR 05000269/2011018 Section 4OA5 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - Oconee - IR 05000269/2011018 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Oconee) @ 2011Q3
Self-Identified List (Oconee)
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