05000250/FIN-2012002-02
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Finding | |
|---|---|
| Title | Control power cables repeatedly submerged in ground water, contrary to design |
| Description | A self-revealing non-cited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, was identified when FPL did not maintain safety-related power cables in the environment for which they were designed and tested. Specifically, 125 volt DC control power cables feeding various safety related components and cables supporting other risk significant equipment had been repeatedly submerged in ground water for extended periods of time and this submergence had the potential to affect the ability of the cables to perform safety related functions. The issue was entered into the licensees CAP as AR 1717619. Although predominantly Unit 3 cables were submerged, because equipment is shared, both units were affected. Allowing water accumulation in the manhole(s) after disabling of the sump pump without compensatory measures to keep the safety related and risk significant cables dry resulted in subjecting the cables to an environment for which they were not designed, and was a performance deficiency. The finding was more than minor because it challenged the reliability of systems that respond to initiating events to prevent undesirable consequences, which is an attribute of the Mitigating Systems cornerstone. The inspectors evaluated the finding in accordance with IMC 0609.04, Phase 1, Initial Screening and Characterization of Findings. The finding was of very low safety significance because it did not represent an actual loss of safety function or contribute to external event core damage sequences. The finding had a cross-cutting aspect in Problem Identification and Resolution, Corrective Action Program, (P.1(c)), because FPL did not thoroughly evaluate submerged cables such that the resolutions addressed causes and extent of conditions, including evaluating for operability. |
| Site: | Turkey Point  |
|---|---|
| Report | IR 05000250/2012002 Section 1R06 |
| Date counted | Mar 31, 2012 (2012Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.06 |
| Inspectors (proximate) | G Kuzo J Laughlin M Barillas D Mas-Penaranda D Rich N Griffis M Coursey C Fletcher J Stewart N Childs M Donithan |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Turkey Point - IR 05000250/2012002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Turkey Point) @ 2012Q1
Self-Identified List (Turkey Point)
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