05000445/FIN-2012002-03
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Finding | |
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| Title | Inadequate Past Operability Determination for the Diesel Generators |
| Description | The inspectors identified a non-cited violation of 10 CFR Part 50, Appendix B, Criterion V, for the failure to follow procedure and perform an adequate past operability evaluation to determine if a condition would have made a system inoperable in the past. Specifically, the licensee failed to determine that when a diesel generator was paralleled to the grid with a high bus voltage condition, the diesel generator was inoperable. As a result of the inadequate past operability evaluation, the licensee incorrectly classified the significance of the condition report. The licensee entered the finding into the corrective action program as Condition Report CR-2011-006113. The failure to follow procedure and perform an adequate past operability evaluation of the diesel generators was a performance deficiency which resulted in the licensee incorrectly classifying the significance of the condition report. The finding was more than minor because if left uncorrected, it would have the potential to lead to a more significant safety concern, in that, the licensee could fail to correct a condition commensurate with its safety significance. Using NRC Manual Chapter 0609, Significance Determination Process, Attachment 4, Phase 1 - Initial Screening and Characterization of Findings, the finding was determined to be of very low safety significance in the mitigating systems cornerstone because it did not result in the equipment being unable to perform its safety function for greater than its technical specification allowed outage time, and did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. The finding has a human performance cross-cutting aspect associated with work practices because the licensee failed to use error prevention techniques, such as pre-job briefings, that were commensurate with the risk of the assigned task and support human performance error prevention |
| Site: | Comanche Peak  |
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| Report | IR 05000445/2012002 Section 1R15 |
| Date counted | Mar 31, 2012 (2012Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | B Tindell G Apger J Kramer |
| CCA | H.12, Avoid Complacency |
| INPO aspect | QA.4 |
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Finding - Comanche Peak - IR 05000445/2012002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Comanche Peak) @ 2012Q1
Self-Identified List (Comanche Peak)
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