05000269/FIN-2012003-04
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Finding | |
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Title | Licensee-Identified Violation |
Description | 10 CFR 50, Appendix B, Criterion XVI, Corrective Action, stated, in part, that measures shall be established to assure that conditions adverse to quality, such as failures, deficiencies, and defective material are promptly identified and corrected. Contrary to the above, from 2006 to 2012, a condition adverse to quality was not promptly identified and corrected. In 2006 ONS completed a corrective action to review all potential AB flooding sources and failed to identify the Coolant Storage (CS) and RCW system as a flooding source that could impact safety related equipment. In 2012 it was determined that if the non-seismically qualified Coolant Storage (CS) system or RCW System, while cross-connected between Unit 1 / 2 and Unit 3, were to fail as a result of a seismic event, safety related SSCs in the AB could be adversely affected. The violation was determined to be of very low safety significance (Green), based on the licensees determination that even though there were sections of the CS system that were not seismically qualified, the non-seismic CS piping was robust enough to withstand a seismic event. A review of the volume of water that would have been released following a break of the RCW piping if cross connected between the units determined that based on actual tank levels in the AB which would collect water released from a break when the systems had been crosstied in the past that the Unit 3 HPI pumps would not have been affected. In addition, the volume of the Unit 1 / Unit 2 HPI pump room was large enough to preclude any impact following a break even with the RCW systems cross-connected. The licensee entered this issue into their CAP as PIP O-12-1876. |
Site: | Oconee ![]() |
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Report | IR 05000269/2012003 Section 4OA7 |
Date counted | Jun 30, 2012 (2012Q2) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | Licensee-identified |
Inspection Procedure: | |
Inspectors (proximate) | A Sabisch G Ottenberg B Collins K Ellis E Stamm A Sengupta S Darbali J Bartley W Loo |
INPO aspect | |
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Finding - Oconee - IR 05000269/2012003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Oconee) @ 2012Q2
Self-Identified List (Oconee)
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