05000424/FIN-2016007-03
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Finding | |
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Title | Failure to Meet Isolation Requirements When Incorporating Non- Class 1E Components into Class 1E electrical Circuits |
Description | The NRC identified a Green non-cited violation of Title 10 Code of Federal Regulations Part 50, Appendix B, Criterion III Design Control, for installing non-safety related Individual Cell Equalizer devices into the Class 1E battery charging circuits without isolation as specified by Institute of Electrical and Electronics Engineers standard 384 as amended by RG 1.75. The violation was entered into the licensees corrective action program as condition report 10294321. The licensee was evaluating corrective actions, which included the removal of the non-Class 1E components. The performance deficiency was determined to be more than minor because it affected the Design Control attribute of the Mitigating Systems Cornerstone and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems to respond to initiating events to prevent undesirable consequences. Specifically, the failure to conform to Class 1E design requirements for independence affected the reliability of the Class 1E battery systems. The team determined the finding to be of very low safety significance (Green), because it was a deficiency affecting the design or qualification of a SSC, and the SSC maintained its operability or functionality. The team did not assign a crosscutting aspect because the most significant contributor did not reflect current licensee performance. |
Site: | Vogtle ![]() |
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Report | IR 05000424/2016007 Section 1R21 |
Date counted | Dec 31, 2016 (2016Q4) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.21 |
Inspectors (proximate) | A Della Grecaa Ruh J Bartley J Eargle T Fanelli T Su W Sherbin |
Violation of: | 10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion III, Design Control |
INPO aspect | |
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Finding - Vogtle - IR 05000424/2016007 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Vogtle) @ 2016Q4
Self-Identified List (Vogtle)
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