05000458/FIN-2011005-02
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Finding | |
|---|---|
| Title | Failure to Adequately Monitor the Performance of the Control Building Chiller System |
| Description | The inspectors identified a Green non-cited violation of 10 CFR 50.65(a)(2) involving the failure to adequately monitor the performance of the control building chilled water system. Specifically, the inspectors determined that the station had failed to track system unavailability following the systems classification of a high risk system and did not monitor the system at the train level, ultimately masking the performance of individual trains. The licensee entered this issue into the licensees corrective action program as Condition Report CR-RBS-2011-07332. The finding was more than minor since violations of 10 CFR 50.65(a)(2) necessarily involve degraded system performance which, if left uncorrected, could become a more significant safety concern. This finding has very low safety significance because the finding did not lead to an actual loss of safety function of the system or cause a component to be inoperable, nor did it screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. The inspectors determined the cause of the finding was the lack of management oversight. Following the issuance of River Bend Station Probabilistic Risk Assessment interim Revision 4a, several personnel functioned as the maintenance rule coordinator and control building chilled water system engineer. During this period, station management did not ensure sufficient knowledge transfer for effective maintenance rule implementation. Therefore, this finding has a cross-cutting aspect in the human performance area associated with the resources component because the licensee failed to ensure supervisory and management oversight of work activities such that nuclear safety is supported |
| Site: | River Bend  |
|---|---|
| Report | IR 05000458/2011005 Section 1R12 |
| Date counted | Dec 31, 2011 (2011Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | A Barrett C Osterholtz D Strickland G Larkin M Hayes M Young N Okonkwo S Garchow V Gaddy |
| CCA | H.2, Field Presence |
| INPO aspect | LA.2 |
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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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