Finding | |
|---|---|
| Title | Capability of Auxiliary Feedwater System to Meet Design and Licensing Requirements |
| Description | Green. The inspectors identified a Green NCV of 10 CFR 50, Appendix B, Criterion III, Design Control, for failure to include the cumulative effects of the replacement of the 1A motor driven auxiliary feedwater (AFW) pump rotating element, accuracy of AFW system resistance values, safety relief valve setpoint tolerances, and turbine driven AFW pump speed settings on evaluation of the performance of the AFW system. This finding was entered into the licensees corrective action program as condition report CR 2007105979. This finding is more than minor because it affects the Mitigating Systems Cornerstone objective of ensuring the availability, reliability, and operability of the AFW system to perform the intended safety function during a design basis event and the cornerstone attribute of Design Control, i.e. initial design. The inspectors assessed the finding using the SDP and determined that the finding was of very low safety significance (Green) because the deficiencies did not result in the AFW system being inoperable based upon subsequent analysis that showed that the AFW system had sufficient flow performance margin to accommodate pump performance and the increased system flow resistance when applying appropriate resistance values and steam generator backpressures. (Section 4OA5.2 |
| Site: | Vogtle  |
|---|---|
| Report | IR 05000424/2008002 Section 4OA5 |
| Date counted | Mar 31, 2008 (2008Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | R Berryman B Collins T Chandler S Shaeffer L Lake G Mccoy C Peabody |
| INPO aspect | |
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Finding - Vogtle - IR 05000424/2008002 | |||||||||||||||||
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Finding List (Vogtle) @ 2008Q1
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