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On August 22,2003, at 0201 Central Time, w … On August 22,2003, at 0201 Central Time, while operating at 100 percent power, Grand Gulf Nuclear Station experienced an invalid actuation of the 'A' Standby Service Water (SSW) System. A failed DC/DC converter power supply in Panel 1H22P400 for the Division 1 Diesel Generator (DG) resulted in a faulty DG speed monitor signal indicating DG speed greater than 450 revolutions per minute (RPM). The DG was not running since it was already inoperable due to a planned outage. The event occurred during restoration activities to prepare the DG for retest. The invalid DG start signal caused the outside air fan and SSW 'A' to auto start as designed to support DG operation. SSW 'A' started and functioned as designed. No other actuations occurred and all support systems functioned properly.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
07:01:00, 22 August 2003 +
20:41:00, 27 August 2003 +
07:01:00, 22 August 2003 +
On August 22,2003, at 0201 Central Time, w … On August 22,2003, at 0201 Central Time, while operating at 100 percent power, Grand Gulf Nuclear Station experienced an invalid actuation of the 'A' Standby Service Water (SSW) System. A failed DC/DC converter power supply in Panel 1H22P400 for the Division 1 Diesel Generator (DG) resulted in a faulty DG speed monitor signal indicating DG speed greater than 450 revolutions per minute (RPM). The DG was not running since it was already inoperable due to a planned outage. The event occurred during restoration activities to prepare the DG for retest. The invalid DG start signal caused the outside air fan and SSW 'A' to auto start as designed to support DG operation. SSW 'A' started and functioned as designed. No other actuations occurred and all support systems functioned properly.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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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00:00:00, 27 August 2003 +
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>.
02:25:23, 2 March 2018 +
20:41:00, 27 August 2003 +
true +
false +
5.57 d (133.67 hours, 0.796 weeks, 0.183 months) +
07:01:00, 22 August 2003 +
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.