05000324/FIN-2008005-02
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Finding | |
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Title | Failure to Take Prompt Corrective Actions for Low Oil Level in the 2B RHRSW Booster Pump |
Description | The inspectors identified a Green NCV of 10 CFR 50, Appendix B, Criterion XVI, Corrective Action for failure to assure that a condition adverse to quality was promptly corrected, which resulted in the licensee declaring the 2B residual heat removal service water (RHRSW) booster pump inoperable while responding to the Unit 2 reactor scram on November 9, 2008. The licensee added oil to the bearing, restored the RHRSW to operable and entered the issue into the Corrective Action Program (CAP). The deficiency associated with this event is not promptly investigating and correcting the low oil level in the 2B RHRSW booster pump bearing. The finding is more than minor because it affects the Mitigating Systems Cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e. core damage). It is also associated with the cornerstone attribute of equipment availability and reliability. Since the finding affects both core damage frequency (CDF) and suppression pool cooling, an evaluation using NRC Inspection Manual Chapter (IMC) 0609, Appendix H, Containment Integrity Significance Determination Process was performed. Appendix H table 4.1 lists suppression pool cooling as a contributor to late containment failure, but not large, early release frequency (LERF). Therefore the change in CDF associated with the finding was used to characterize its significance. Using the NRC, pre-solved phase two significance determination process worksheets, the change in core damage frequency was found to be less than 1E-6, therefore this finding is of very low safety significance (Green). The cause of the finding is related to the cross-cutting aspect of thoroughly evaluating problems as described in the Corrective Action Program component of the Problem Identification and Correction cross-cutting area, since the low oil level was identified, but a thorough investigation of the problem was not promptly performed. (P.1(c)) (Section 4OA3 |
Site: | Brunswick |
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Report | IR 05000324/2008005 Section 4OA3 |
Date counted | Dec 31, 2008 (2008Q4) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71153 |
Inspectors (proximate) | H Gepford J Austin M Bates D Jones R Musser R Baldwin G Kolcum |
CCA | P.2, Evaluation |
INPO aspect | PI.2 |
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Finding - Brunswick - IR 05000324/2008005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Brunswick) @ 2008Q4
Self-Identified List (Brunswick)
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