05000259/FIN-2013005-05
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Finding | |
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Title | Failure to Maintain Emergency Diesel Room Floor Drains |
Description | The NRC-identified a non-cited violation (NCV) of 10 CFR 50, Appendix B, Criterion III, Design Control, for the licensees failure to establish measures to ensure the EDG floor drains maintained the capability of performing their intended function as described their design basis. The licensees immediate corrective action was to clean all the drains in all the EDG rooms. The licensee has entered this issue into their corrective action program as problem evaluation report 765575. The finding was more than minor because, if left uncorrected, the performance deficiency would have the potential to lead to a more significant safety concern, in that, the EDG room floor drains could become sufficiently clogged such that internal flooding would cause the affected EDG to be unable to perform its safety function. The inspectors performed a Phase 1 screening in accordance with IMC 0609, Significance Determination Process, Appendix A, Exhibit 1, Initiating Event screening question E, and determined the finding was of very low safety significance (Green) because it did not impact the frequency of an internal flooding event. This finding has a cross-cutting aspect in the area of Problem Identification and Resolution, Corrective Action Program Component, because TVA did not identify floor drain issues completely, accurately, and in a timely manner commensurate with their safety significance. |
Site: | Browns Ferry ![]() |
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Report | IR 05000259/2013005 Section 4OA2 |
Date counted | Dec 31, 2013 (2013Q4) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71152 |
Inspectors (proximate) | A Sengupta C Kontz D Dumbacher J Bartley L Pressley M Riches R Baldwin T Stephenr Baldwint Stephen A Sengupta C Kontz D Dumbacher J Bartley L Pressley M Riches |
Violation of: | 10 CFR 50 Appendix B Criterion III, Design Control |
CCA | P.1, Identification |
INPO aspect | PI.1 |
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Finding - Browns Ferry - IR 05000259/2013005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Browns Ferry) @ 2013Q4
Self-Identified List (Browns Ferry)
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