05000458/FIN-2010004-05
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Finding | |
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| Title | Inadequate High Pressure Core Spray Pump Room Cooler Bearing Maintenance |
| Description | A self-revealing, very low safety significance (Green) noncited violation 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was reviewed for the licensees failure to prescribe lubrication and installation of bearings on the high-pressure core spray room cooler motors by adequate procedures. In response to this finding, the licensee changed their procedure for performing material equivalency evaluations to require that, when plant components change and associated vendor-recommended maintenance schedules change, licensee personnel also update the corresponding preventivemaintenance tasks. The licensee entered this issue into their corrective action program as Condition Report CR-RBS-2010-02919. This finding was more than minor because it was associated with the equipment performance attribute of the Mitigating Systems Cornerstone and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences, in that this finding caused inoperability of the high-pressure core spray. The significance of this finding was determined by completing a Phase 3 analysis in accordance with Inspection Manual Chapter 0609, Appendix A, which determined that the incremental core damage probability maximum was 2x10-7, and that the finding was therefore of very low safety significance (Green). This finding did not represent current licensee performance and consequently did not have a cross-cutting aspect because the cause of this finding was that when the licensee replaced a component by a similar component from a different vendor, no licensee procedure required them to update the associated maintenance frequencies, and because before this finding was identified, the licensee had no reasonable opportunity to identify and correct that deficiency in that procedure. (Section 1R19) |
| Site: | River Bend  |
|---|---|
| Report | IR 05000458/2010004 Section 1R19 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | P Elkmann C Osterholtz R Hagar G Larkin V Gaddy C Norton D Strickland R Kumana C Stancil G Guerra |
| INPO aspect | |
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Finding - River Bend - IR 05000458/2010004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (River Bend) @ 2010Q3
Self-Identified List (River Bend)
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