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The inspectors identified a finding of ver … The inspectors identified a finding of very low safety significance (Green) involving a NCV of 10 CFR Part 50, Appendix B, Criterion XVI, \"Corrective Action,\" for a deficient evaluation of a failed \'B\' emergency diesel generator (EDG) scavenging air box gasket in April 2007. The deficient evaluation resulted in ineffective corrective actions to identify and correct an improper application of the same type of gasket material in the \'A\' EDG (EG-Y-1A) scavenging air box gasket. As a result, on June 3, 2010, the \'A\' EDG scavenging air box gasket failed during performance of a monthly surveillance test run. Corrective action included replacing the gasket with the original design, entering the issue into the CAP, and conducting a root cause analysis (RCA). The inspectors determined the deficient extent of condition review of the April 2007, \'B\' EDG scavenging air box gasket failure was a performance deficiency. This performance deficiency is more than minor because it affected the Equipment Performance Aspect of the Mitigating Systems Cornerstone Objective of ensuring the operability, availability, and reliability of systems designed to mitigate transients and prevent core damage. Specifically, this finding reduced the reliability of, and resulted in additional unplanned unavailability for, the \'A\' EDG. The team assessed this finding in accordance with NRC IMC 0609, Attachment 4, Phase 1 - \"Initial Screening and Characterization of Findings,\" and determined that it was of very low safety significance (Green) since it did not result in a loss of any system safety function. The issue has a cross-cutting aspect in the area of problem identification and resolution, because Exelon had identified in 2007 that a y\" inch Gore-TexTM gasket had not been specifically authorized by an engineering change report (ECR) to be used in the EDGs scavenging air box application (IR 616514 and 6266457). However, Exelon did not evaluate the issue such that extent of condition was properly considered and the cause was properly resolved for the \'A\' EDG (P.1(c)).perly resolved for the \'A\' EDG (P.1(c)).
23:59:59, 30 September 2010 +
23:59:59, 30 September 2010 +
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>.
00:41:40, 21 February 2018 +
23:59:59, 30 September 2010 +