05000498/FIN-2007007-02
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Finding | |
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Title | Manual Loads Not Considered for Fuel Oil Storage Tank Sizing Calculation |
Description | The team identified a noncited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, having very low safety significance for the failure to include all potential loads in the standby diesel generator fuel oil sizing calculation. Specifically, the licensee did not account for increased standby diesel generator fuel oil usage resulting from the addition of manual electrical loads during the 7-day mission run time. The licensee entered this finding into their corrective action program as Condition Record 07-15592. The licensee subsequently demonstrated that the spent fuel pool cooling pumps would be the only additional manual loads actually used during the 7 days of operation in the bounding design basis scenario and that there were additional conservative assumptions in the sizing calculation to demonstrate sufficient margin. The finding was determined to be more than minor because it is associated with the Mitigating Systems cornerstone attribute of Design Control. It impacts the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events and prevent undesirable consequences. Using Inspection Manual Chapter 0609, Appendix A, Significance Determination of Reactor Inspection Findings for At-Power Situations, Phase 1 screening, the finding screened as having very low safety significance (Green) because it was a design or qualification deficiency confirmed not to result in loss of operability or functionality. |
Site: | South Texas ![]() |
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Report | IR 05000498/2007007 Section 1R21 |
Date counted | Mar 31, 2008 (2008Q1) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.21 |
Inspectors (proximate) | H Anderson B Henderson S Rutenkroger W Sifre R Bywater J Chiloyan M Chambers G Apger S Makor |
INPO aspect | |
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Finding - South Texas - IR 05000498/2007007 | |||||||||||||||||||||||||||||||||||||||||
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Finding List (South Texas) @ 2008Q1
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