05000397/FIN-2012002-01
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Finding | |
|---|---|
| Title | Failure to Take Corrective Actions to Address Hardened Lubricant Safety-Related Disconnect Switches |
| Description | The inspectors reviewed a self-revealing non-cited violation of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Actions, for the licensee\'s failure to take corrective actions to address hardened lubricant in safety-related 480V disconnect switches. On December 7, 2011, a safety-related 480V disconnect switch unexpectedly opened due to hardened grease. The inspectors discovered that a similar issue occurred in October 2009, and that evaluation of the issue under Action Request AR 206698206698concluded that preventive maintenance instructions were inadequate because they did not require removal of hardened lubricant from disconnect switches prior to the application of fresh lubricant. The inspectors determined that the licensee failed to perform an extent of condition review to identify other disconnects that had received similar preventive maintenance including the 480V disconnect switch that unexpectedly opened on December 7, 2011. Following identification of this issue, the licensee discovered 147 additional critical disconnects that may not have been adequately lubricated and initiated work requests to verify the disconnects were fully latched until the revised maintenance procedures could be implemented. This issue was entered into the licensees corrective action program as Action Request AR 253985253985 The failure to take prompt corrective actions to address hardened lubricant in safety-related disconnect switches was a performance deficiency. This finding was more than minor because it affected the equipment performance attribute of the Mitigating Systems Cornerstone objective of ensuring the reliability of systems that respond to initiating events. The inspectors used Inspection Manual Chapter 0609.04, Phase 1 Initial Screening and Characterization of Findings, and determined that the finding was of very low safety significance (Green) because it did not result in the loss of a system safety function, did not represent the loss of safety function of a single train for greater than its allowed outage time, did not result in the loss of safety function of any non-technical specification equipment, and did not screen as potentially risk significant due to seismic, flooding, or severe weather initiating events. The inspectors determined that this finding had a cross-cutting aspect in the area of problem identification and resolution associated with the corrective action program component because the licensee failed to thoroughly evaluate the extent of the condition and need for resolution for all components potentially affected by the inadequate maintenance procedure identified in Action Request AR 206698206698 |
| Site: | Columbia  |
|---|---|
| Report | IR 05000397/2012002 Section 1R04 |
| Date counted | Mar 31, 2012 (2012Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.04 |
| Inspectors (proximate) | W Walker J Laughlin J Groom M Hayes W Schaup S Hedger D Bradley |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Columbia - IR 05000397/2012002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Columbia) @ 2012Q1
Self-Identified List (Columbia)
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