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On August 12, 2011, while removing the Uni … On August 12, 2011, while removing the Unit 2, Division II 24/48 volt DC Cabinet 2B from service for planned maintenance, Unit 2 secondary containment and partial Group II primary containment isolation signals were initiated upon disconnecting the battery with the following systems and components successfully started and actuated as designed:</br>- Unit 1 and 2 Standby Gas Treatment (SGT) systems automatically started</br>- Complete actuation of Unit 2 secondary containment isolation devices in system 2T41</br>- Partial Group 2 primary containment isolation devices in systems in Division II associated with the 2D11, 2P33, and 2T48 systems.</br>The procedure for rotating the affected battery chargers did not contain adequate direction to ensure the charger was functioning properly before disconnecting the associated battery in preparation for its replacement. This actuation was confirmed to be an invalid actuation as an unplanned response associated with this maintenance activity. Therefore, the event is not reportable under 10CFR50.72(b)(3)(iv), since it was not a valid actuation. In accordance with 10CFR50.73(a)(1) the option of reporting this event as a telephone notification within 60 days is being used. The event is reportable under 10CFR50.73(a)(2)(iv)(A) because the actuations were not planned and were not expected to occur. In this case the systems to which the requirements of 10CFR50.73(a)(2)(iv)(A) apply are general containment (primary and secondary) isolation signals as described in 10CFR50.73(a)(2)(iv)(B)(2) for the 'B' logic resulting in isolation of the associated valves on Unit 2, thereby affecting containment isolation valves in more than one system. Control room personnel restored the Unit 2, Division II 24/48 volt DC Cabinet 2B and the condition was cleared.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
09:03:00, 12 August 2011 +
47,337 +
12:50:00, 11 October 2011 +
09:03:00, 12 August 2011 +
On August 12, 2011, while removing the Uni … On August 12, 2011, while removing the Unit 2, Division II 24/48 volt DC Cabinet 2B from service for planned maintenance, Unit 2 secondary containment and partial Group II primary containment isolation signals were initiated upon disconnecting the battery with the following systems and components successfully started and actuated as designed:</br>- Unit 1 and 2 Standby Gas Treatment (SGT) systems automatically started</br>- Complete actuation of Unit 2 secondary containment isolation devices in system 2T41</br>- Partial Group 2 primary containment isolation devices in systems in Division II associated with the 2D11, 2P33, and 2T48 systems.</br>The procedure for rotating the affected battery chargers did not contain adequate direction to ensure the charger was functioning properly before disconnecting the associated battery in preparation for its replacement. This actuation was confirmed to be an invalid actuation as an unplanned response associated with this maintenance activity. Therefore, the event is not reportable under 10CFR50.72(b)(3)(iv), since it was not a valid actuation. In accordance with 10CFR50.73(a)(1) the option of reporting this event as a telephone notification within 60 days is being used. The event is reportable under 10CFR50.73(a)(2)(iv)(A) because the actuations were not planned and were not expected to occur. In this case the systems to which the requirements of 10CFR50.73(a)(2)(iv)(A) apply are general containment (primary and secondary) isolation signals as described in 10CFR50.73(a)(2)(iv)(B)(2) for the 'B' logic resulting in isolation of the associated valves on Unit 2, thereby affecting containment isolation valves in more than one system. Control room personnel restored the Unit 2, Division II 24/48 volt DC Cabinet 2B and the condition was cleared.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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98 +
00:00:00, 11 October 2011 +
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>.
02:05:48, 2 March 2018 +
12:50:00, 11 October 2011 +
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60.158 d (1,443.78 hours, 8.594 weeks, 1.978 months) +
09:03:00, 12 August 2011 +
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