05000423/FIN-2014005-03
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Finding | |
|---|---|
| Title | Failure to Correct Multiple A HVK Start and Runtime Failures |
| Description | The inspectors identified a Green NCV of 10 CFR 50, Appendix B, Criterion XVI associated with Dominions failure to promptly identify or correct conditions adverse to quality associated with the equipment reliability of the Unit 3 A control building chilled water system (HVK) chiller from September 26, 2014 to December 13, 2014. Specifically, the component was placed into service without establishing adequate corrective actions resulting in failures to start on 17 of 20 demands. Further, the component experienced run time failures due to a series of no less than six identified and corrected failure modes within the exposure window. Dominion has entered these concerns into their CAP as CR560039 and CR566762. This finding was determined to be more than minor in accordance with IMC 0612, Power Reactor Inspection Reports, Appendix B, Issue Screening, dated September 7, 2012, as it represented a challenge to the equipment performance attribute of the Mitigating Systems cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. This finding screened to be of very low safety significance (Green) as there was no loss of system or function due to the functionality of the B HVK chiller train. Inspectors identified a cross-cutting aspect in Human Performance, Conservative Bias, due to Dominions acceptance of multiple repetitive failures to start and failures to run. |
| Site: | Millstone  |
|---|---|
| Report | IR 05000423/2014005 Section 1R15 |
| Date counted | Dec 31, 2014 (2014Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | B Fuller B Haagensen E Burket H Gray H. Anagnostopoulus J Ambrosini J D'Antonio L Mckown N Floyd R Mckinley |
| Violation of: | 10 CFR 50 Appendix B Criterion XVI |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Millstone - IR 05000423/2014005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Millstone) @ 2014Q4
Self-Identified List (Millstone)
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