ENS 46594
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ENS Event | |
|---|---|
14:02 Sep 9, 2009 | |
| Title | Unsealed Penetrations Discovered in the Intake Structure |
| Event Description | On September 9, 2009, the NRC Component Design Basis Inspection (CDBI) Team identified Fire Protection penetrations on the west side of the Intake Structure were not sealed and it has been determined that the penetrations were below the USAR [Updated Safety Analysis Report] credited flood level. Flooding through the penetrations could have impacted the ability of all the station Raw Water Pumps to perform their design accident mitigation functions. Reference Fort Calhoun Station Condition Report 2009-4166.
This eight-hour notification is being made pursuant to 10 CFR 50.72 (b)(3)(v). This report should have been made on September 9, 2009, and is late. Subsequent review of the issue determined this reportability. The penetrations have since been sealed. The licensee notified the NRC Resident Inspector. See EN#46590 dated 2/3/2011 for a similar event at Fort Calhoun. |
| Where | |
|---|---|
| Fort Calhoun Nebraska (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+12315.25 h513.135 days <br />73.305 weeks <br />16.869 months <br />) | |
| Opened: | Nathan Seid 18:17 Feb 4, 2011 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Feb 4, 2011 |
| 46594 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
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