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On 11/2/09 at 0712 shutdown cooling (SDC) … On 11/2/09 at 0712 shutdown cooling (SDC) was lost on Dresden Unit 2 when a recirculation loop temperature element (2-0260-13B) failed upscale. Unit 2 was in the process of initial cooldown for entry into a refueling outage. Recirculation loop temperature was approximately 224 degrees F based on alternate indications. The circuitry was jumpered out and SDC was restarted at 0748. The Recirculation loop temperature was at 260 degrees F upon restart. At 0835, the reactor entered Mode 4 (i.e., Recirculation loop temperature less than or equal to 212 degrees F and Mode Switch in Shutdown). This event is reportable under 10CFR 50.72(b)(3)(v)(B). This event is being reported based on lessons learned from industry experience and is undergoing further review.</br>The licensee notified NRC Resident Inspector. licensee notified NRC Resident Inspector. +
12:12:00, 2 November 2009 +
45,472 +
14:23:00, 2 November 2009 +
12:12:00, 2 November 2009 +
On 11/2/09 at 0712 shutdown cooling (SDC) … On 11/2/09 at 0712 shutdown cooling (SDC) was lost on Dresden Unit 2 when a recirculation loop temperature element (2-0260-13B) failed upscale. Unit 2 was in the process of initial cooldown for entry into a refueling outage. Recirculation loop temperature was approximately 224 degrees F based on alternate indications. The circuitry was jumpered out and SDC was restarted at 0748. The Recirculation loop temperature was at 260 degrees F upon restart. At 0835, the reactor entered Mode 4 (i.e., Recirculation loop temperature less than or equal to 212 degrees F and Mode Switch in Shutdown). This event is reportable under 10CFR 50.72(b)(3)(v)(B). This event is being reported based on lessons learned from industry experience and is undergoing further review.</br>The licensee notified NRC Resident Inspector. licensee notified NRC Resident Inspector. +
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00:00:00, 2 November 2009 +
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>.
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12:12:00, 2 November 2009 +
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