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A Green self-revealing Finding was identif … A Green self-revealing Finding was identified for failure to provide adequate vendor oversight for non-safety related work, which led to the incorrect installation of balance weights on the Unit 1 main turbine. As a result, the turbine experienced high vibrations during startup on April 20, 2008, which required the insertion of a manual turbine and reactor trip. The licensee entered the deficiency into the corrective action program for resolution (CR 096233). Corrective actions to correct the balance move, implement peer review requirements, and procedural changes that require independent verification of the balance move location and weight have been implemented. A violation of regulatory requirements was not identified. The finding is greater than minor because it had an actual impact on safety, it led to a plant trip, and is associated with the human performance attribute of the Reactor Safety Initiating Events cornerstone and adversely affected the cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. The finding, evaluated per Attachment 4 of the SDP, screened to very low safety significance (Green) because it did not contribute to both an initiating event and the likelihood of a loss of mitigating equipment or functions. The cause of the finding is related to the cross-cutting element of human performance work practices. Human error prevention techniques such as peer checks were not invoked by the licensee (H.4(a)). (Section 4OA3.2 by the licensee (H.4(a)). (Section 4OA3.2 +
23:59:59, 31 December 2008 +
23:59:59, 31 December 2008 +
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>.
00:39:01, 29 October 2017 +
23:59:59, 31 December 2008 +