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Instrument Maintenance (IM) technicians we … Instrument Maintenance (IM) technicians were performing a quarterly channel functional test on the B Reactor Feedwater level channel with the A reactor feedwater level channel in service. A During the surveillance test, the technicians incorrectly performed a step in the procedure and lifted the Channel B-Device GT leads. A Per procedure, the step for lifting the leads is only performed if a high reactor water level condition exists, and no such condition existed. A Lifting the leads caused a loss of the reactor vessel level input signal for feedwater control, resulting in an immediate demand by the Master Level Controller. A A feedwater transient began that resulted in reactor water level rising above the High Level 8 trip initiating an automatic reactor scram. The cause of this event was human error. The technicians involved did not follow the procedure and performed a step not applicable to current plant conditions. A Corrective actions for this event include personnel actions for the technicians involved in the event, revising the surveillance procedure and reviewing other IM procedures, issuing a risk review and screening procedure, training on various topics, and increasing management oversight on backshifts.easing management oversight on backshifts. +
July 24, 2001 +
Instrument Maintenance (IM) technicians we … Instrument Maintenance (IM) technicians were performing a quarterly channel functional test on the B Reactor Feedwater level channel with the A reactor feedwater level channel in service. A During the surveillance test, the technicians incorrectly performed a step in the procedure and lifted the Channel B-Device GT leads. A Per procedure, the step for lifting the leads is only performed if a high reactor water level condition exists, and no such condition existed. A Lifting the leads caused a loss of the reactor vessel level input signal for feedwater control, resulting in an immediate demand by the Master Level Controller. A A feedwater transient began that resulted in reactor water level rising above the High Level 8 trip initiating an automatic reactor scram. The cause of this event was human error. The technicians involved did not follow the procedure and performed a step not applicable to current plant conditions. A Corrective actions for this event include personnel actions for the technicians involved in the event, revising the surveillance procedure and reviewing other IM procedures, issuing a risk review and screening procedure, training on various topics, and increasing management oversight on backshifts.easing management oversight on backshifts. +
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>.
0.00271 d (0.065 hours, 3.869048e-4 weeks, 8.9037e-5 months) +, 0.00291 d (0.0697 hours, 4.150132e-4 weeks, 9.55055e-5 months) +, 0.00375 d (0.09 hours, 5.357143e-4 weeks, 1.23282e-4 months) +, 0.00524 d (0.126 hours, 7.490079e-4 weeks, 1.723665e-4 months) +, 0.00972 d (0.233 hours, 0.00139 weeks, 3.1962e-4 months) + and 0.0081 d (0.194 hours, 0.00116 weeks, 2.6635e-4 months) +
3 +
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>.
04:32:59, 1 December 2017 +
September 21, 2001 +
July 24, 2001 +
URL"URL" is a <a href="/Special:Types/URL" title="Special:Types/URL">type</a> and predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> to represent URI/URL values.