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During the daily review of CRs, inspectors … During the daily review of CRs, inspectors reviewed CR464332, which documented that cross connect damper TAV-82, which connected two trains of turbine building ventilation, was modeled in the licensees probabilistic risk assessment (PRA) tool as open, when the actual position of the damper was closed. When the licensees PRA tool was updated with the correct damper position, the daily risk calculated to comply with 10 CFR 50.65(a)(4) increased from green to orange on train B, and from green to red on train A. The licensee reevaluated the model taking credit for a nonsafety-related (NSR) general turbine building ventilation system that also provided air flow to the two rooms in question and the risk was reduced. The updated model for the removal of a TBFCU from service maintained green risk for train B and only increased train A to yellow risk. At the conclusion of the inspection period the inspectors needed additional information to determine if an error in the original inputs to the base PRA tool, versus an error in the daily application of the PRA tool, was a violation of 10 CFR 50.65(a)(4). As a result, this item was considered unresolvedesult, this item was considered unresolved +
23:59:59, 31 March 2012 +
23:59:59, 31 March 2012 +
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>.
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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>.
00:45:00, 21 February 2018 +
23:59:59, 31 March 2012 +