05000280/FIN-2008004-01
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Finding | |
|---|---|
| Title | Inadequate Design control for the EDG Ambient Air Temperature Limit |
| Description | The inspectors identified a Green non-cited violation (NCV) of 10 CFR 50 Appendix B, Criterion III, Design Control, for a change in the EDG ambient air temperature operating limits, from 100oF to 120oF, that was made without an adequate design analysis. The licensee entered the issue into their corrective action program (CAP) for resolution using condition report (CR) 102488. The inspectors concluded that the licensees failure to perform the necessary analysis to support the increase of the EDG ambient air temperature operating limit from 100oF to 120oF was a performance deficiency. The finding, more than minor in accordance with MC 0612, Appendix E, examples 3j and k, is associated with the design control attribute of the Mitigating System Cornerstone. The cornerstone objective of ensuring the availability and reliability of systems that respond to initiating events to prevent undesirable consequences was adversely affected. Using Inspection Manual Chapter 0609, Significance Determination Process, Attachment 4 the inspectors concluded that the finding is of very low safety significance (Green) because the condition did not represent an actual loss of safety function due to the ambient temperature exceeding 100oF but not exceeding 105oF. The finding also was not potentially risk significant due to a seismic, flooding, or severe weather initiating event. A cross-cutting aspect was not assigned to the issue because it is not indicative of recent performance. (Section 1RO1) |
| Site: | Surry  |
|---|---|
| Report | IR 05000280/2008004 Section 1R01 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.01 |
| Inspectors (proximate) | R Hamilton W Loo H Gepford J Nadel C Welch D Arnett M Reichard |
| INPO aspect | |
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Finding - Surry - IR 05000280/2008004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Surry) @ 2008Q3
Self-Identified List (Surry)
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