05000341/FIN-2008004-03
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Finding | |
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Title | Inadequate 10 CFR 50.59 Evaluation for Reactor Building Missile Protection |
Description | The inspectors identified a Green (Severity Level IV) NCV for an inadequate 10 CFR 50.59, Changes, Tests, and Experiments, evaluation resulting in failure to receive prior NRC approval for changes in licensed activities associated with protection of safety-related equipment against tornado generated missiles. Specifically, the licensee failed to demonstrate that the proposed change did not result in an increase in the probability of a malfunction of equipment important to safety previously evaluated in the Updated Final Safety Analysis Report (UFSAR). As part of the corrective actions, the licensee installed missile shields and initiated a study to determine the appropriate long-term corrective actions. The finding was greater than minor because the change had the potential for impacting the NRCs ability to perform its regulatory function as the inspectors determined the change would have required prior NRC approval. Based on a phase 3 significance determination, the senior risk analyst determined the finding was of very low safety significance because the change in core damage frequency for this finding was calculated to be less than 1.0E-7. This was determined to be a Severity Level IV NCV of 10 CFR 50.59(a)(2)(i) (1989). (Section 4OA2.3) |
Site: | Fermi ![]() |
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Report | IR 05000341/2008004 Section 4OA2 |
Date counted | Sep 30, 2008 (2008Q3) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71152 |
Inspectors (proximate) | A Dunlop J Cassidy T Steadham M Phalen D Jones R Morris A Wilson V Meghani F Tran |
INPO aspect | |
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Finding - Fermi - IR 05000341/2008004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Fermi) @ 2008Q3
Self-Identified List (Fermi)
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