05000259/FIN-2015007-02
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Finding | |
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| Title | |
| Description | A NRC-identified non-cited violation (NCV) of Technical Specifications (TS) 5.4.1 was identified for the failure to develop a preventive maintenance (PM) schedule that specified inspection of the Emergency Diesel Generators (EDG) neutral grounding resistor as recommended by Regulatory Guide (RG) 1.33, 9.b. Specifically, procedures failed to provide proper guidance to maintain the grounding resistor in accordance with design basis as described in the UFSAR and electrical calculations. Upon identification of the issue, the licensee performed a visual inspection of the resistor and determined that it was functional based on no signs of physical degradation or damage. The licensee entered this issue into the corrective action program (CAP) as CR1114779 to evaluate and implement appropriate corrective actions. This performance deficiency was more than minor because if left uncorrected it could result in a more significant safety concern. Specifically, lack of inspections of the secondary grounding resistor could allow for an undetected condition which would cause transient voltages capable of damaging safety related equipment. The finding was screened for significance using the Mitigating Systems cornerstone column of IMC 0609, Attachment 4, Phase 1 - Initial Screening and Characterization of Findings, dated June 19, 2012, and was determined to be of very low safety significance (Green) using IMC 0609 Appendix A, The Significance Determination Process (SDP) for Findings At- Power, dated June 19, 2012, because the finding affected the design or qualification of a Mitigating SSC, and the SSC maintained its operability as documented in CR 1114779. No cross-cutting was assigned because it is not indicative of current licensee performance. |
| Site: | Browns Ferry  |
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| Report | IR 05000259/2015007 Section 1R21 |
| Date counted | Dec 31, 2015 (2015Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21M |
| Inspectors (proximate) | D Terry-Ward G Ottenberg J Bartley M Yeminy R Patterson W Deschaine |
| Violation of: | Technical Specification - Procedures Technical Specification |
| INPO aspect | |
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Finding - Browns Ferry - IR 05000259/2015007 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Browns Ferry) @ 2015Q4
Self-Identified List (Browns Ferry)
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