ENS 51526
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ENS Event | |
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04:40 Nov 10, 2015 | |
Title | Reactor Building Vacuum Less than Technical Specifications Requirement |
Event Description | At 2040 PST on 11/9/2015, Reactor Building (Secondary Containment) pressure increased to above the Technical Specification Surveillance requirement of 0.25 inches vacuum water gauge for approximately seven minutes. Operators took action to manually start Standby Gas Treatment System to restore Reactor Building pressure. This event 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. The cause of the event is under investigation.
There were no radiological releases associated with the event. No safety system actuations or isolations occurred. The licensee notified the NRC Resident Inspector. |
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:+-0.42 h-0.0175 days <br />-0.0025 weeks <br />-5.75316e-4 months <br />) | |
Opened: | Bryan Heavilin 04:15 Nov 10, 2015 |
NRC Officer: | Donald Norwood |
Last Updated: | Nov 10, 2015 |
51526 - 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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