05000423/FIN-2014013-01
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Finding | |
|---|---|
| Title | Failure to Resolve Anomalous Data During Complex Troubleshooting of the Turbine Driven Auxiliary Feedwater Pump Controls |
| Description | The Team identified a Green NCV of Title 10 of the Code of Federal Regulations (10 CFR), Part 50, Appendix B, Criterion V, Instructions, Procedures and Drawings, for the failure to follow procedure MA-AA-103, Conduct of Troubleshooting, Revision 11 following the failure of the TDAFW pump to properly start on September 10, 2014, during quarterly surveillance testing. Specifically, between September 10 and September 13, 2014, Dominion failed to identify, review and address conflicting troubleshooting results for the governor shutdown relay (3CR) and the electrical overspeed relay (1CON) in the TDAFW control circuit by failing to compare troubleshooting result with the expected results. Dominion entered this issue into their corrective action program as condition report 567073. This finding was more than minor because if left uncorrected, the failure to address anomalous conditions or inconsistent data in accordance with procedural requirements could result in degraded or deficient conditions. This issue was of very low safety significance because there was no loss of TDAFW operability or functionality. These troubleshooting issues, given the actions taken by Dominion to replace electrical components and the governor and subsequent satisfactory surveillance testing and electrical circuit checks, had no impact on TDAFW pump functionality. The Team concluded that this finding had a cross-cutting aspect in the Human Performance, Teamwork area because individuals and work groups failed to communicate and coordinate their activities within and across organizational boundaries to ensure nuclear safety is maintained. |
| Site: | Millstone  |
|---|---|
| Report | IR 05000423/2014013 Section 4OA5 |
| Date counted | Dec 31, 2014 (2014Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 93812 |
| Inspectors (proximate) | J Rogge L Mckown W Schmidt D Orr J Deboer |
| Violation of: | 10 CFR 50 Appendix B Criterion V |
| CCA | H.4, Teamwork |
| INPO aspect | PA.3 |
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Finding - Millstone - IR 05000423/2014013 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Millstone) @ 2014Q4
Self-Identified List (Millstone)
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