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On July 30, 2004 at approximately 2125 hou … On July 30, 2004 at approximately 2125 hours CDT, Instrument Maintenance personnel were performing the Unit One Reactor Low Pressure (RHR/LPCI) Calibration and Functional Test. At this time, the technicians determined that two out of the four "Reactor Steam Dome Pressure - Low" switches in LPCI loop select logic were out of tolerance high. These switches delay completion of the LPCI loop select logic during Single Loop Reactor Recirculation Pump operations (SLO) until the reactor pressure is less than 900 psig. With these switches out of tolerance high, LPCI loop select logic sensitivity was degraded, increasing the potential to select the wrong loop for injection during periods of SLO. At the time of discovery, both Reactor Recirculation pumps were in operation.</br>Both switches were recalibrated immediately upon discovery to within Technical Specification tolerances.</br>The NRC Resident Inspector was notified of this event by the licensee.as notified of this event by the licensee. +
02:25:00, 31 July 2004 +
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01:28:00, 31 July 2004 +
02:25:00, 31 July 2004 +
On July 30, 2004 at approximately 2125 hou … On July 30, 2004 at approximately 2125 hours CDT, Instrument Maintenance personnel were performing the Unit One Reactor Low Pressure (RHR/LPCI) Calibration and Functional Test. At this time, the technicians determined that two out of the four "Reactor Steam Dome Pressure - Low" switches in LPCI loop select logic were out of tolerance high. These switches delay completion of the LPCI loop select logic during Single Loop Reactor Recirculation Pump operations (SLO) until the reactor pressure is less than 900 psig. With these switches out of tolerance high, LPCI loop select logic sensitivity was degraded, increasing the potential to select the wrong loop for injection during periods of SLO. At the time of discovery, both Reactor Recirculation pumps were in operation.</br>Both switches were recalibrated immediately upon discovery to within Technical Specification tolerances.</br>The NRC Resident Inspector was notified of this event by the licensee.as notified of this event by the licensee. +
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85 +
00:00:00, 31 July 2004 +
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>.
02:23:05, 2 March 2018 +
01:28:00, 31 July 2004 +
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02:25:00, 31 July 2004 +
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.