ENS 46893
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ENS Event | |
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05:15 May 26, 2011 | |
Title | Potential Flooding Path Discovered |
Event Description | Operations identified a potential flooding issue in the Intake Structure 1007' 6" level. The areas of concern are the holes in the floor at the 1007' 6" level where the screen wash header penetrates the ceiling of the Raw Water Vault. There are five of these penetrations of concern. Flooding through the penetrations could have impacted the ability of the station's Raw Water (RW) pumps to perform their design accident mitigation functions.
This eight-hour notification is being made pursuant to 10 CFR 50.72 (b)(3)(v). A one foot sandbag berm has been placed around each penetration of concern. The licensee notified the NRC Resident Inspector.
Following additional review of the reported condition, it has been determined that the Raw Water pumps are adequately protected during flooding conditions and that the open penetrations would not impact the ability of the Raw Water pumps to perform their design accident mitigation functions. The licensee notified the NRC Resident Inspector. Notified R4DO (Haire). |
Where | |
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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:+1.15 h0.0479 days <br />0.00685 weeks <br />0.00158 months <br />) | |
Opened: | Amy Burkhart 06:24 May 26, 2011 |
NRC Officer: | Donald Norwood |
Last Updated: | Aug 22, 2011 |
46893 - NRC Website
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Unit 1 | |
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Reactor critical | Not Critical |
Scram | No |
Before | Cold Shutdown (0 %) |
After | Cold Shutdown (0 %) |
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