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At 1453 CDT on April 04, 2014, the station … At 1453 CDT on April 04, 2014, the station's Seismic Monitor generated a seismic event alarm that was determined to be invalid based upon no recorded readings above alarm setpoint, no seismic activity being felt on site, and no activity detected by National Earthquake Information Center or Monticello Nuclear Generating Plant. The monitor was declared non-functional since it would not generate a control board seismic event alarm during an actual event until the invalid event was reset. This monitor has no credited compensatory measure that will allow timely classification of two Emergency Action Levels (EALs), NUE (Notification of Unusual Event) and Alert classifications when out of service. This results in a Loss of Emergency Assessment Capability while the Seismic Monitor is out of service. This is a reportable condition in accordance with 10 CFR 50.72(b)(3)(xiii).</br>Maintenance has reset the alarm and has evaluated the monitor's performance. The alarm has been determined to be spurious. The monitor is working properly and will generate a control board alarm during an actual event, as determined by observed normal operation and the lack of any self-diagnostic error messages. At 1900 CDT on April 04, 2014 the monitor was declared functional and returned to service.</br>There was no seismic activity during the out of service period indicated by the local seismic monitor display and no reports of seismic activity were reported to the site by National Earthquake Information Center or Monticello Nuclear Generating Plant. This event did not adversely affect the safe operation of the plant or health and safety of the public.</br>The licensee has notified the NRC Resident Inspector.e has notified the NRC Resident Inspector. +
19:53:00, 4 April 2014 +
50,001 +
22:12:00, 4 April 2014 +
19:53:00, 4 April 2014 +
At 1453 CDT on April 04, 2014, the station … At 1453 CDT on April 04, 2014, the station's Seismic Monitor generated a seismic event alarm that was determined to be invalid based upon no recorded readings above alarm setpoint, no seismic activity being felt on site, and no activity detected by National Earthquake Information Center or Monticello Nuclear Generating Plant. The monitor was declared non-functional since it would not generate a control board seismic event alarm during an actual event until the invalid event was reset. This monitor has no credited compensatory measure that will allow timely classification of two Emergency Action Levels (EALs), NUE (Notification of Unusual Event) and Alert classifications when out of service. This results in a Loss of Emergency Assessment Capability while the Seismic Monitor is out of service. This is a reportable condition in accordance with 10 CFR 50.72(b)(3)(xiii).</br>Maintenance has reset the alarm and has evaluated the monitor's performance. The alarm has been determined to be spurious. The monitor is working properly and will generate a control board alarm during an actual event, as determined by observed normal operation and the lack of any self-diagnostic error messages. At 1900 CDT on April 04, 2014 the monitor was declared functional and returned to service.</br>There was no seismic activity during the out of service period indicated by the local seismic monitor display and no reports of seismic activity were reported to the site by National Earthquake Information Center or Monticello Nuclear Generating Plant. This event did not adversely affect the safe operation of the plant or health and safety of the public.</br>The licensee has notified the NRC Resident Inspector.e has notified the NRC Resident Inspector. +
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100 +
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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>.
01:51:11, 2 March 2018 +
22:12:00, 4 April 2014 +
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0.0967 d (2.32 hours, 0.0138 weeks, 0.00318 months) +
19:53:00, 4 April 2014 +
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.