05000416/FIN-2013002-02
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Finding | |
|---|---|
| Title | Failure to Monitor for Ice on Standby Service Water Towers |
| Description | The inspectors identified a non-cited violation of 10 CFR 50, Appendix B, Criterion V, for the licensees failure to monitor for ice accumulation on the standby service water cooling towers in accordance with station procedures. On January 17, 2013, the plant experienced a winter storm but operators did not implement Standby Service Water System Operating Instruction, 04-1-01-P41-1, Revision 137, Section 6.2, Cold Weather Operation, which directed the licensee to monitor the standby service water cooling tower for ice accumulation when weather conditions existed that could have resulted in icing of the cooling tower fill material and missile grating. The licensee entered this issue into their corrective action program as Condition Report CR-GGNS-2013-00426. The failure to monitor for ice accumulation in accordance with station procedures is a performance deficiency. The finding is more than minor because if left uncorrected, it could lead to a more significant safety concern. Specifically, the occurrence of ice accumulation on the standby service water cooling towers, if unmonitored, could cause damage to the fill material and/or the tower missile gratings, which would render the standby service water system inoperable. Using NRC Inspection Manual Chapter 0609, Attachment 4, Initial Characterization of Findings, the inspectors determined that the issue affected the Mitigating Systems Cornerstone. In accordance with NRC Inspection Manual Chapter 0609, Appendix A, The Significance Determination Process (SDP) for Findings at Power, the inspectors determined that the issue had a very low safety significance (Green) because it was not a deficiency affecting the design or qualification of a mitigating system, structure or component, does not represent a loss of system or function, does not represent a loss of function for greater than its technical specification allow outage time, and does not represent a loss of function as defined by 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 />. The finding has a cross-cutting aspect in the human performance area associated with the work control component because the licensee failed to appropriately plan work activities based on environmental conditions that may impact plant structures, systems and components. |
| Site: | Grand Gulf  |
|---|---|
| Report | IR 05000416/2013002 Section 1R13 |
| Date counted | Mar 31, 2013 (2013Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.13 |
| Inspectors (proximate) | B Rice D Proulx J Braisted J Laughlin R Smith S Achen S Hedger S Makor |
| Violation of: | 10 CFR 50 Appendix B Criterion V Technical Specification Technical Specification - Procedures |
| CCA | H.5, Work Management |
| INPO aspect | WP.1 |
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Finding - Grand Gulf - IR 05000416/2013002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Grand Gulf) @ 2013Q1
Self-Identified List (Grand Gulf)
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