Finding | |
|---|---|
| Title | Failure to Control the Issuance of Instructions and Drawings for Transformer Replacements |
| Description | Green. An NRC identified NCV of 10 CFR Part 50, Appendix B, Criterion VI, Document Control, was identified after maintenance on safety-related 4kv to 480 volt transformers TS1A and TS1B (Unit 1) resulted in the windings tap setting being misconfigured. The licensees failure to develop work instructions to change TS1A and TS1B transformer configuration was a performance deficiency. This performance deficiency was more than minor because it impacted the Mitigating Systems cornerstone attribute of configuration control in that the loads supplied by 480 volt shutdown boards 1A and 1B were challenged by this misconfiguration. The finding screened as Green because the electrical system remained operable. The licensee entered the condition into their corrective action plan as CR 1221265 and corrected the tap setting. The finding was not assigned a cross-cutting aspect because the cause was not related to current licensee performance. |
| Site: | Browns Ferry  |
|---|---|
| Report | IR 05000259/2017001 Section 4OA3 |
| Date counted | Mar 31, 2017 (2017Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | A Blamey A Nielsen A Ruh D Dumbacher J Seat P Cooper R Kellner T Stephen W Pursley |
| Violation of: | 10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion VI Technical Specification |
| INPO aspect | |
| ' | |
Finding - Browns Ferry - IR 05000259/2017001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Browns Ferry) @ 2017Q1
Self-Identified List (Browns Ferry)
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