05000280/FIN-2011011-01
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Finding | |
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Title | Failure to Provide Appropriate Procedural Guidance for Component Cooling Water Flow to the Thermal Barrier Heat Exchangers |
Description | The team identified a non-cited violation of Technical Specification 6.4.A.3, Unit Operating Procedures and Programs, for the licensees failure to provide appropriate procedural guidance to assure the operators ability to detect and correct a component cooling (CC) water low flow condition through the thermal barrier heat exchanger. The licensee entered this in their corrective action program as CR 455255. The licensees failure to provide appropriate procedural guidance to assure that CC flow to thermal barrier heat exchangers was maintained greater than 35 gpm was a performance deficiency. The performance deficiency was more than minor because it was associated with the procedure quality attribute of the Initiating Event Cornerstone and adversely affected the cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. Specifically, the failure to translate the appropriate minimum flow requirement value into procedures adversely affected the operators ability to detect and correct a CC water low flow condition through the thermal barrier heat exchanger which could result in entering an event with a back-up system in a degraded condition. In accordance with Nuclear Regulatory Commission Inspection Manual Chapter 0609.04, Initial Screening and Characterization of Findings, the team conducted a Phase 1 Significance Determination Process screening and determined the finding to be of very low safety significance (Green) because assuming worst case degradation, the finding would not exceed the Technical Specification limit for any reactor coolant system leakage, and the finding did not affect other mitigation systems. The finding was reviewed for cross-cutting aspects and none were identified since the performance deficiency was not indicative of current licensee performance. |
Site: | Surry |
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Report | IR 05000280/2011011 Section 1R21 |
Date counted | Dec 31, 2011 (2011Q4) |
Type: | NCV: Green |
cornerstone | Initiating Events |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.21 |
Inspectors (proximate) | D Jones G Skinner B Sherbin R Nease J Eargle A Alen M Endress |
INPO aspect | |
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Finding - Surry - IR 05000280/2011011 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Surry) @ 2011Q4
Self-Identified List (Surry)
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