ENS 49758
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ENS Event | |
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01:56 Jan 23, 2014 | |
Title | Loss of Secondary Containment Differential Pressure |
Event Description | A spurious closure of a Secondary Containment isolation damper caused a trip of the Fuel Building ventilation system and a loss of Secondary Containment differential pressure. Secondary Containment differential pressure exceeded -0.25 inches of water vacuum rendering Secondary Containment inoperable between the time of 1956 and 2003 [CST]. The damper re-opened, fuel building ventilation was restarted and Secondary Containment differential pressure was restored to normal. This event is reportable under 10CFR50.72(b)(3)(v)c.
The Licensee will be notifying the NRC Resident Inspector". Investigation for the spurious closure of a Secondary Containment isolation damper is in progress. |
Where | |
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Clinton Illinois (NRC Region 3) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |
LER: | 05000461/LER-2014-001 |
Time - Person (Reporting Time:+-2.33 h-0.0971 days <br />-0.0139 weeks <br />-0.00319 months <br />) | |
Opened: | Joe Lizewski 23:36 Jan 22, 2014 |
NRC Officer: | Jeff Rotton |
Last Updated: | Jan 22, 2014 |
49758 - NRC Website
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Unit 1 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (97 %) |
After | Power Operation (97 %) |
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