05000255/FIN-2008004-05
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Finding | |
|---|---|
| Title | Inadequate AFW low suction Pressure Trip Setpoints |
| Description | Green. The inspectors identified a finding of very low safety significance (Green) and an associated NCV of 10 CFR Part 50, Appendix B, Criterion III, \"Design Control,\" for the failure to protect the auxiliary feedwater (AFW) pumps from damage due to the loss of the condensate storage tank (CST) due to tornado born missiles. Specifically, the licensee used low CST level trips to protect the AFW pumps but the trips did not protect the pumps during certain severe weather conditions (tornado). This issue was entered into the licensee\'s CAP as CR-PLP-2006-00659 and CR-PLP-2006-00961; and the licensee has implemented compensatory actions to ensure the AFW function is available during severe weather. The finding is more than minor because it impacted the equipment performance attribute of the Mitigating Systems Cornerstone and adversely affected the objective to ensure availability, reliability and capability of the systems which respond to initiating events (namely tornado missiles). Based on a phase three significance determination, the senior risk analyst determined that because the condensate storage tank could withstand tornado winds, the only risk to the tank was from tornado missiles. With the low frequency of tornado missiles, this screens as very low safety significance, green. (Section 4OA5.3) |
| Site: | Palisades  |
|---|---|
| Report | IR 05000255/2008004 Section 4OA5 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | J Cassidy J Ellegood V Meghani J Giessner F Tran P Laflamme T Taylor |
| INPO aspect | |
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Finding - Palisades - IR 05000255/2008004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palisades) @ 2008Q3
Self-Identified List (Palisades)
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