05000346/FIN-2008008-01
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Finding | |
|---|---|
| Title | Failure to Perform a 10 CFR 50.59 Evaluation for Service Water System Modification |
| Description | The inspectors identified a Severity Level IV NCV, having very low safety significance, of 10 CFR 50.59, Changes, Tests, and Experiments, for the licensees failure to provide a documented basis for determining that changes to the service water system did not require prior NRC approval. Specifically, the licensee removed flow restricting piping orifices, which created an adverse change to the service water system, because the service water pumps could have insufficient net positive suction head during accident conditions. The licensee revised the service water system operating procedure to ensure that this change did not result in operation of the service water pumps with inadequate net positive suction head and entered this issue into the corrective action program. Because the issue affected the NRCs ability to perform its regulatory function, this issue was evaluated using the traditional enforcement process. The finding was determined to be more than minor because the inspectors could not reasonably determine that the change would not have ultimately required NRC prior approval. The finding was determined to be of very low safety significance because the licensee had not aligned the service water system in a configuration that could have damaged the pumps |
| Site: | Davis Besse  |
|---|---|
| Report | IR 05000346/2008008 Section 1R17 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | TEV: Severity level IV |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.17 |
| Inspectors (proximate) | M Holmberg C Brown J Bozga D Hills |
| INPO aspect | |
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Finding - Davis Besse - IR 05000346/2008008 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Davis Besse) @ 2008Q3
Self-Identified List (Davis Besse)
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