ENS 49834
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ENS Event | |
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08:44 Feb 17, 2014 | |
Title | Loss of Secondary Containment Differential Pressure |
Event Description | Reactor Building (Secondary Containment) pressure rose above the Technical Specification Surveillance requirement of 0.25 inches vacuum water gauge multiple times from 0044 [PST] to 0305 [PST] on 2/17/14. The alarm was received in the control room at 0305 [PST]. This is reportable as an event that could have prevented fulfillment of a safety function needed to control the release of radiation and mitigate the consequences of an accident. Reactor Building pressure has been restored to normal (greater than 0.25 inches of vacuum water gauge), returning Secondary Containment to operable status. Highest actual value indicated was +0.21 inches pressure water gauge. The cause of the event is under investigation.
There were no radiological releases associated with the event. The NRC Resident Inspector has been notified. |
Where | |
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Columbia ![]() Washington (NRC Region 4) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
Time - Person (Reporting Time:+1.97 h0.0821 days <br />0.0117 weeks <br />0.0027 months <br />) | |
Opened: | Quoc Vo 10:42 Feb 17, 2014 |
NRC Officer: | Charles Teal |
Last Updated: | Feb 17, 2014 |
49834 - NRC Website
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Unit 2 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
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