05000423/FIN-2015001-01
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Finding | |
|---|---|
| Title | Failure to Identify Charging and Primary Closed Cooling Water Area Heater Transformers Equipment Environmental Qualification Non-Conformance |
| Description | The inspectors identified a Green NCV of Title 10 of the Code of Federal Regulations (10 CFR) 50, Appendix B, Criterion XVI, associated with Dominions failure to promptly identify conditions adverse to quality associated with the Millstone Unit 3 Charging System (CHS) and Component Cooling Primary (CCP) area heaters which are required to support operability of the charging system when outside temperature is less than 17F, from September 17, 2014, to February 11, 2015. Dominion completed restoration of the B train CHS and CCP area heaters on February 14, 2015, and has scheduled completion of the A train heater restoration for April 16, 2015. This finding was determined to be more than minor in accordance with IMC 0612, Power Reactor Inspection Reports, Appendix B, Issue Screening, 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 safety function of the charging system was not lost based upon the capability of the nonconforming heaters to maintain charging area temperatures greater than 65F. Inspectors identified a cross-cutting aspect in Human Performance, Procedure Adherence, for Dominions failure to adequately screen the condition adverse to quality upon discovery of heater failure and failure to evaluate heater maintenance history when making changes to heater preventive maintenance frequency. |
| Site: | Millstone  |
|---|---|
| Report | IR 05000423/2015001 Section 1R15 |
| Date counted | Mar 31, 2015 (2015Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | B Haagensen J Ambrosini J Furia K Reimer L Mckown R Mckinley |
| Violation of: | 10 CFR 50 Appendix B Criterion XVI |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - Millstone - IR 05000423/2015001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Millstone) @ 2015Q1
Self-Identified List (Millstone)
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