05000382/FIN-2014005-04
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Finding | |
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| Title | Failure to Establish Design Control Measures for the Suitability of Safety-Related Relays |
| Description | The inspectors reviewed a self-revealing, non-cited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, for the licensees failure to establish measures for the selection and review for suitability of application of materials, parts, equipment, and processes that are essential to the safety-related functions of the structures, systems and components. Specifically, the licensee did not have an adequate replacement frequency for safety-related relays associated with engineered safety features equipment to ensure that all required equipment operated in the time sequence assumed by the safety analysis. The licensee entered this condition into their corrective action program as condition report CRWF3- 2013-05091. The licensee replaced the affected relays and reduced their replacement frequency from 18 years to 3 years to restore compliance. The inspectors determined that the performance deficiency was more than minor because it was associated with the Equipment Performance attribute of the Mitigating Systems Cornerstone and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the failure to develop an adequate replacement frequency for the relays used to monitor for under-voltage conditions on the safety-related emergency busses could have prevented the equipment from performing its safety function. The inspectors determined the finding was of very low safety significance (Green) because the finding was a deficiency affecting the qualification of a mitigating system component and the affected equipment maintained its operability. The inspectors determined the finding had a cross-cutting aspect in the area of Human Performance, Challenging the Unknown, because the licensee did not stop when faced with uncertain conditions, and risks were not evaluated and managed before proceeding [H.11] (Section 1R19). |
| Site: | Waterford  |
|---|---|
| Report | IR 05000382/2014005 Section 1R19 |
| Date counted | Dec 31, 2014 (2014Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | C Speer F Ramirez N Greene P Elkmann P Hernandez R Lantz |
| Violation of: | 10 CFR 50 Appendix B Criterion III, Design Control |
| CCA | H.11, Challenge the Unknown |
| INPO aspect | QA.2 |
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Finding - Waterford - IR 05000382/2014005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Waterford) @ 2014Q4
Self-Identified List (Waterford)
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