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This 60-day telephone notification is bein … This 60-day telephone notification is being made under reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) to describe an invalid actuation of general containment isolation signals affecting more than one system.</br>On November 15, 2005, while operating at 100% thermal power, at 08:05 hours CST, Browns Ferry Unit 2 incurred an inadvertent, invalid actuation of the PCIS Group 6 logic. One reactor zone ventilation exhaust radiation monitor (the B channel) was indicating downscale due to a pre-existing maintenance issue, and, during activities to formally place the channel in a tripped status in accordance with the applicable Technical Specifications, the PCIS logic fuse for the opposite (A channel) radiation monitor was inadvertently removed rather than the fuse for the B channel. The PCIS logic responded as designed to the condition of both radiation monitors being downscale, and a Group 6 logic actuation resulted. The actuation was invalid because it resulted from an error related to an equipment tagging activity; there were no actual plant conditions which required the associated equipment actuations/isolations to occur.</br>The following equipment actuations/isolations occurred: Unit 2 Group 6</br>* Initiation of the Standby Gas Treatment System </br>* Initiation of Control Room Emergency Ventilation </br>* Isolation of the following equipment:</br> * reactor zone and refuel zone normal ventilation systems</br> * drywell-torus differential pressure compressor</br> * drywell-torus Hydrogen/Oxygen analyzers</br> * drywell radiation continuous air particulate monitor</br>All equipment responded in accordance with the plant design. There were no safety consequences or impacts on the health and safety of the public. The event was entered into TVA's corrective action program for resolution.</br>The NRC senior resident inspector has been notified.nior resident inspector has been notified. +
14:05:00, 15 November 2005 +
42,215 +
14:01:00, 21 December 2005 +
14:05:00, 15 November 2005 +
This 60-day telephone notification is bein … This 60-day telephone notification is being made under reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) to describe an invalid actuation of general containment isolation signals affecting more than one system.</br>On November 15, 2005, while operating at 100% thermal power, at 08:05 hours CST, Browns Ferry Unit 2 incurred an inadvertent, invalid actuation of the PCIS Group 6 logic. One reactor zone ventilation exhaust radiation monitor (the B channel) was indicating downscale due to a pre-existing maintenance issue, and, during activities to formally place the channel in a tripped status in accordance with the applicable Technical Specifications, the PCIS logic fuse for the opposite (A channel) radiation monitor was inadvertently removed rather than the fuse for the B channel. The PCIS logic responded as designed to the condition of both radiation monitors being downscale, and a Group 6 logic actuation resulted. The actuation was invalid because it resulted from an error related to an equipment tagging activity; there were no actual plant conditions which required the associated equipment actuations/isolations to occur.</br>The following equipment actuations/isolations occurred: Unit 2 Group 6</br>* Initiation of the Standby Gas Treatment System </br>* Initiation of Control Room Emergency Ventilation </br>* Isolation of the following equipment:</br> * reactor zone and refuel zone normal ventilation systems</br> * drywell-torus differential pressure compressor</br> * drywell-torus Hydrogen/Oxygen analyzers</br> * drywell radiation continuous air particulate monitor</br>All equipment responded in accordance with the plant design. There were no safety consequences or impacts on the health and safety of the public. The event was entered into TVA's corrective action program for resolution.</br>The NRC senior resident inspector has been notified.nior resident inspector has been 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, 21 December 2005 +
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>.
22:39:40, 24 September 2017 +
14:01:00, 21 December 2005 +
true +
false +
35.997 d (863.93 hours, 5.142 weeks, 1.183 months) +
14:05:00, 15 November 2005 +
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.