05000280/FIN-2009004-02
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Finding | |
|---|---|
| Title | Failure to provide an adequate basis for operability of ESW pump 1-SW-P-1B |
| Description | The inspectors identified a Green finding for the incorrect operability determination for emergency service water pump 1-SW-P-1B on August 1, 2009, after vibrations had increased 391% in the vertical plane (CR 343396). A violation of regulatory requirements was not identified. The pump, declared inoperable on August 2, was replaced within the Technical Specification allowed outage time. The finding is more than minor because if left uncorrected the performance deficiency could potentially lead to more significant safety concerns. The finding is 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. The finding, evaluated per MC-0609, Attachment 4, Phase 1 Initial Screening and Characterization of Findings, was determined to be of very low safety significance (Green) because it did not result in a loss of safety function or the loss of a single train of ESW for greater than the allowed outage time. This finding has a cross-cutting aspect in the area of human performance, decision making, because the licensee failed to use conservative assumptions in their operability decision for 1-SW-P-1B (H.1.b) |
| Site: | Surry  |
|---|---|
| Report | IR 05000280/2009004 Section 1R15 |
| Date counted | Sep 30, 2009 (2009Q3) |
| Type: | Finding: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | C Welch D Arnett G Mccoy J Nadel |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Surry - IR 05000280/2009004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Surry) @ 2009Q3
Self-Identified List (Surry)
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