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On 01/22/2013 at 00:30 Reactor building HV … On 01/22/2013 at 00:30 Reactor building HVAC tripped due to low outside air temperature and Standby Gas Treatment system was manually started and maintained Reactor Building differential pressure negative. At 01:13 secondary containment pressure went positive during restart of the Center Reactor Building HVAC Train. This is a loss of secondary containment function. In a 12 second time span secondary containment pressure went above 0 inches WC (Water Column) to +0.17 inches WC and then decreased to < 0 inches WC remaining stable during the Reactor Building HVAC restart. The Center Reactor Building HVAC Exhaust Fan Discharge Damper opened after the Supply Fan discharge damper; this condition would produce the indications noted.</br>The System was returned to normal with two Reactor Building HVAC trains running and the Standby Gas Treatment System shutdown and in standby. Reactor building pressure is stable with differential pressure negative < - 0.30 inches WC.</br>The loss of Secondary Containment function is reportable under 10 CFR 50.72 (b)(3)(v)(C) as an event or condition that could have prevented the fulfillment of a safety function needed to control the release of radioactive material.</br>The licensee notified the NRC Resident Inspector.he licensee notified the NRC Resident Inspector. +
06:13:00, 22 January 2013 +
08:38:00, 22 January 2013 +
06:13:00, 22 January 2013 +
On 01/22/2013 at 00:30 Reactor building HV … On 01/22/2013 at 00:30 Reactor building HVAC tripped due to low outside air temperature and Standby Gas Treatment system was manually started and maintained Reactor Building differential pressure negative. At 01:13 secondary containment pressure went positive during restart of the Center Reactor Building HVAC Train. This is a loss of secondary containment function. In a 12 second time span secondary containment pressure went above 0 inches WC (Water Column) to +0.17 inches WC and then decreased to < 0 inches WC remaining stable during the Reactor Building HVAC restart. The Center Reactor Building HVAC Exhaust Fan Discharge Damper opened after the Supply Fan discharge damper; this condition would produce the indications noted.</br>The System was returned to normal with two Reactor Building HVAC trains running and the Standby Gas Treatment System shutdown and in standby. Reactor building pressure is stable with differential pressure negative < - 0.30 inches WC.</br>The loss of Secondary Containment function is reportable under 10 CFR 50.72 (b)(3)(v)(C) as an event or condition that could have prevented the fulfillment of a safety function needed to control the release of radioactive material.</br>The licensee notified the NRC Resident Inspector.he licensee notified the NRC Resident Inspector. +
Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
68 +
00:00:00, 22 January 2013 +
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>.
02:01:59, 2 March 2018 +
08:38:00, 22 January 2013 +
true +
false +
0.101 d (2.42 hours, 0.0144 weeks, 0.00331 months) +
06:13:00, 22 January 2013 +
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.