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This telephone report is being made in acc … This telephone report is being made in accordance with 10 CFR 50.73(a)(2)(iv)(A) as an event or condition caused by an invalid signal that resulted in an automatic Group 6 isolation. On August 31, 2010 at 1737 CDT, Group 6 of Primary Containment Isolation System (PCIS) actuated. This resulted in completion of Secondary Containment isolation, initiation of the Standby Gas Treatment System and Control Room Emergency Filtration System. An invalid signal occurred apparently as a result of a voltage transient on the Nebraska City 345kV line. This was from a 3-phase fault to ground due to a structural failure during a severe thunder storm with high winds.</br>The equipment associated with the Group 6 isolation functioned successfully and the isolation was complete. The Group 6 PCIS was reset. Cooper Nuclear Station operators reviewed the parameters that would cause a Group 6 trip signal (i.e. reactor water level, drywell pressure, reactor building radiation) and determined there were no valid conditions that would have caused the isolation.</br>This event was most likely due an act of nature, thus no corrective actions were required.</br>The NRC Resident Inspector will be notified.e NRC Resident Inspector will be notified. +
22:37:00, 31 August 2010 +
46,367 +
16:39:00, 27 October 2010 +
22:37:00, 31 August 2010 +
This telephone report is being made in acc … This telephone report is being made in accordance with 10 CFR 50.73(a)(2)(iv)(A) as an event or condition caused by an invalid signal that resulted in an automatic Group 6 isolation. On August 31, 2010 at 1737 CDT, Group 6 of Primary Containment Isolation System (PCIS) actuated. This resulted in completion of Secondary Containment isolation, initiation of the Standby Gas Treatment System and Control Room Emergency Filtration System. An invalid signal occurred apparently as a result of a voltage transient on the Nebraska City 345kV line. This was from a 3-phase fault to ground due to a structural failure during a severe thunder storm with high winds.</br>The equipment associated with the Group 6 isolation functioned successfully and the isolation was complete. The Group 6 PCIS was reset. Cooper Nuclear Station operators reviewed the parameters that would cause a Group 6 trip signal (i.e. reactor water level, drywell pressure, reactor building radiation) and determined there were no valid conditions that would have caused the isolation.</br>This event was most likely due an act of nature, thus no corrective actions were required.</br>The NRC Resident Inspector will be notified.e NRC Resident Inspector will be notified. +
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>.
100 +
00:00:00, 27 October 2010 +
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>.
02:08:34, 2 March 2018 +
16:39:00, 27 October 2010 +
true +
false +
56.751 d (1,362.03 hours, 8.107 weeks, 1.866 months) +
22:37:00, 31 August 2010 +
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.