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ENS 49834
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Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +  and 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material +
Current power
100  +
Current reactor mode
Power Operation +
Description
Reactor Building (Secondary Containment) p … 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.</br>There were no radiological releases associated with the event.</br>The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified.  +
Discovered date
08:44:00, 17 February 2014  +
ENS id number
49,834  +
Emergency class
Non Emergency +
Entered date
10:42:00, 17 February 2014  +
Event date
08:44:00, 17 February 2014  +
Event description
Reactor Building (Secondary Containment) p … 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.</br>There were no radiological releases associated with the event.</br>The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified.  +
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ENS 49834 +, ENS 49834 +, ENS 49834 +, ENS 49834 +, ENS 49834 +, ENS 49834 +, ENS 49834 +, ENS 49834 +, ENS 49834 +, ENS 49834 +, ENS 49834 +, ENS 49834 +, ENS 49834 +, ENS 49834 +, ENS 49834 +  and ENS 49834 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 17 February 2014  +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
01:51:42, 2 March 2018  +
NRC officer
Charles Teal +
Notification date
10:42:00, 17 February 2014  +
Originated by
Quoc Vo +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
GE-5 +
Region
NRC Region 4 +
Reporting criterion
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +  and 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material +
Reporting time
0.0821 d (1.97 hours, 0.0117 weeks, 0.0027 months)  +
Site
Columbia +
Start date
08:44:00, 17 February 2014  +
State
Washington +
System
Secondary containment +
Title
Loss of Secondary Containment Differential Pressure  +
URL"URL" is a <a href="/Special:Types/URL" title="Special:Types/URL">type</a> and predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> to represent URI/URL values.
http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2014/20140218en.html#en49834  +
Unit
2  +
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