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The team reviewed a self-revealing non-cit … The team reviewed a self-revealing non-cited violation of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, for the failure to have an adequate preventative maintenance procedure, PM 28129, Refueling Inspection of the Trip Tappet. Specifically, the dimensional criterion for the turbine driven auxiliary feedwater pump head lever to tappet nut engagement was not verified to be in accordance with vendor recommended criteria. This resulted in an inadequate engagement that contributed to a false overspeed trip. The licensees corrective actions included replacement of the trip tappet nut, trip lever, and trip linkage spring, as well as, inspecting all contact points on the trip linkage for damage or wear and specifying a more precise method of measuring the head lever to tappet nut engagement. This issue was documented in the licensees corrective action program as Condition Report 47658. This finding was more than minor because it affected the Mitigating Systems Cornerstone attributes of Human Performance and Procedure Quality and affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. This deficiency resulted in the potential of the turbine driven auxiliary feedwater pump to trip during a seismic, or other jarring events. A Senior Reactor Analyst performed a Phase 3 analysis. The performance deficiency was determined to impact seismic events, since a seismic event could jar the mechanism enough to trip the turbine. Assuming all seismic events would trip the turbine, the analyst used SPAR-H to evaluate operator action to reset the trip mechanism. Considering the recovery, and conservatively assuming a zero baseline, the Delta-CDF of the finding was 7.9E-9/yr, or very low safety significance (Green). This finding did not have any cross-cutting aspects because the preventative maintenance procedure was changed in 1999 and no other procedure changes since then would have caused the licensee to review this change, therefore, it is not representative of current licensee performanceesentative of current licensee performance
23:59:59, 30 September 2012 +
23:59:59, 30 September 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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N O'Keefe +, J Watkins +, G Replogle +, M Baquera +, M Runyan +, John Dixon + and Nnaerika Okonkwo +
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>.
04:19:21, 22 February 2018 +
N O'Keefe +, J Watkins +, G Replogle +, M Baquera +, M Runyan +, John Dixon + and Nnaerika Okonkwo +
23:59:59, 30 September 2012 +