05000424/FIN-2010004-01
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Finding | |
|---|---|
| Title | Failure to Correct Instrument Uncertainty Associated with the ECCS Accumulators |
| Description | An NRC-identified Green NCV of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, was identified for failure to promptly correct an equipment deficiency. Specifically, in February 2006, the licensee identified an issue with the instrument uncertainty associated with the pressure transmitters installed on the emergency core cooling system (ECCS) accumulators. However, several outages later, the design change packages requiring the transmitter change out had been inexplicably deleted and the instrument uncertainty issue remains uncorrected. This issue was more than minor because it was associated with a cornerstone attribute and adversely affected the objective of the Mitigating Systems cornerstone. Specifically, the performance deficiency was an equipment performance issue which affected the availability, reliability, and capability of the ECCS accumulators to respond to a loss of coolant accident. The finding was determined to be of very low safety significance (Green) because the finding did not result in the actual loss of safety function of a single train for greater than its technical specification (TS) allowed outage time. The inspectors determined that the cause of this finding was related to the Work Control component of the Human Performance cross-cutting area due to the licensees failure to appropriately coordinate work activities by incorporating actions to address the impact of changes to the work scope on the plant and human performance H.3(b). |
| Site: | Vogtle  |
|---|---|
| Report | IR 05000424/2010004 Section 4OA2 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | S Shaeffer M King M Cain T Chandler D Hardage |
| CCA | H.5, Work Management |
| INPO aspect | WP.1 |
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Finding - Vogtle - IR 05000424/2010004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Vogtle) @ 2010Q3
Self-Identified List (Vogtle)
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