05000458/FIN-2011005-01
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Finding | |
|---|---|
| Title | Standby Service Water Pump Motor Lubrication Deficiencies |
| Description | The inspectors identified a Green non-cited violation of Technical Specification 5.4.1.a, because the station did not establish appropriate maintenance procedures to lubricate standby service water pump lower motor bearings. Specifically, the inspectors found a legacy of improper maintenance practices involving lubrication of the standby service water pump motor lower bearings going back to 1986. This included mixing of incompatible greases without change evaluations, lubrication techniques that did not comply with pump motor vendor manual or EPRI guidance, improper volume of greases added to the bearings, and improper preventive maintenance frequency for performing re-greasing of the bearings. The licensee entered this issue into the licensees corrective action program as Condition Report CR-RBS-2011-08367. This performance deficiency is more-than-minor and is therefore a finding because if left uncorrected, this performance deficiency has the potential to lead to a more significant safety concern. Specifically, if the subject work orders are not corrected, future work activities that grease the subject bearings in accordance with those work orders may not grease the bearings adequately, which may result in common-cause failures of the station service water pumps. Because this finding was identified while the unit was operating, the inspectors used MC 0609 Appendix A to assess its risk significance. In accordance with that Appendix, the finding screened as green (of very low safety significance) because it was not a design or qualification deficiency; it did not represent a loss of system safety function; and it did not screen as potentially risk-significant due to seismic, flooding, or severe weather initiating events. The inspectors determined that the apparent cause of this finding was failure to include the appropriate scope of information in the work instructions due to overconfidence and lack of adequate review by engineering staff. Specifically, the system engineer who developed the revised instructions failed to develop appropriate steps with adequate detail to appropriately perform the task and the field engineer failed to stop work and discuss the issue with the system engineer that developed the work instructions. Therefore, the finding has a crosscutting aspect in the area of human performance associated with work practices, because engineering personnel failed to use the applicable human error prevention techniques |
| Site: | River Bend  |
|---|---|
| Report | IR 05000458/2011005 Section 1R04 |
| Date counted | Dec 31, 2011 (2011Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.04 |
| Inspectors (proximate) | A Barrett C Osterholtz D Strickland G Larkin M Hayes M Young N Okonkwo S Garchow V Gaddy |
| CCA | H.12, Avoid Complacency |
| INPO aspect | QA.4 |
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Finding - River Bend - IR 05000458/2011005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (River Bend) @ 2011Q4
Self-Identified List (River Bend)
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