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The inspectors documented a self-revealing … The inspectors documented a self-revealing finding for failure to clean the main feedwater turbine lube oil reservoir. Specifically, the main feedwater turbine lube oil reservoir had not been cleaned since 2006, causing clogged filters and low main feedwater turbine bearing oil pressure on February 5, 2016. The licensee entered this finding into their corrective action program as Condition Report CR-ANO-2-2016-00470 and implemented the necessary preventive maintenance. The failure to perform preventive maintenance to ensure cleanliness on the main feedwater pump turbine bearing oil reservoir as required by the preventive maintenance program is a performance deficiency. The performance deficiency is more than minor because it impacted the equipment performance attribute and adversely affected the initiating events cornerstone objective to limit the likelihood of events that upset plant stability and challenged critical safety functions during shutdown as well as power operations. Specifically, the performance deficiency resulted in operators lowering reactor power and rendered a main feedwater pump unavailable. Using NRC Inspection Manual Chapter 0609 Appendix A, The Significance Determination Process (SDP) for Findings At-Power, dated June 19, 2012, the inspectors screened the finding as having very low safety significance because the finding affected a transient initiator but did not result in a reactor trip. The inspectors determined that this finding did not have a cross-cutting aspect because the most significant contributor did not reflect current licensee performance. Specifically, the maintenance strategy changed in 2009, the maintenance strategy changed in 2009 +
23:59:59, 30 June 2016 +
23:59:59, 30 June 2016 +
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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>.
04:23:55, 22 February 2018 +
23:59:59, 30 June 2016 +