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On May 17, 2013 at 0439 EDT, with the unit … On May 17, 2013 at 0439 EDT, with the unit in Mode 3, operators identified RCS temperature decreased below 551 deg. F with the reactor trip breakers closed. The condition existed for approximately one hour after which operators identified this was below the procedurally required value identified to support power range nuclear instrumentation trip operability. The condition was then immediately corrected.</br>The plant remains stable in Mode 3.</br>This condition is reportable pursuant to 10 CFR 50.72(b)(3)(ii)(B) for an unanalyzed condition. The NRC Senior Resident Inspector has been notified.</br>The reactor trip breakers were closed to support rod testing at the time this event occurred. RCS temperature was decreasing due to Terry turbine testing which was being performed at the same time. The reactor trip breakers were opened when the operators identified RCS temperature below 551 degrees. The RCS temperature was returned to above 551 degrees. This temperature limit is specified in Millstone 3 FSAR section 15.4.1, "Uncontrolled rod cluster control assembly bank withdrawal from a subcritical or low power startup condition".</br>The licensee notified state and local authorities.</br>* * * RETRACTION FROM WILLIAM BARTRON TO DONALD NORWOOD AT 1053 EDT ON 5/23/2013 * * *</br>The purpose of this call is to retract the report made on May 17, 2013, Event Number 49047.</br>Upon further review, the condition in which Reactor Coolant System (RCS) temperature decreased below a procedural limit while in Mode 3 did not result in an unanalyzed condition. Engineers verified that RCS boron concentration was sufficiently high that criticality could not have occurred during any inadvertent control rod withdrawal. The details of the engineering review have been provided to the NRC Senior Resident Inspector.</br>Notified R1DO (Gray). Resident Inspector.
Notified R1DO (Gray). +
08:39:00, 17 May 2013 +
12:05:00, 17 May 2013 +
08:39:00, 17 May 2013 +
On May 17, 2013 at 0439 EDT, with the unit … On May 17, 2013 at 0439 EDT, with the unit in Mode 3, operators identified RCS temperature decreased below 551 deg. F with the reactor trip breakers closed. The condition existed for approximately one hour after which operators identified this was below the procedurally required value identified to support power range nuclear instrumentation trip operability. The condition was then immediately corrected.</br>The plant remains stable in Mode 3.</br>This condition is reportable pursuant to 10 CFR 50.72(b)(3)(ii)(B) for an unanalyzed condition. The NRC Senior Resident Inspector has been notified.</br>The reactor trip breakers were closed to support rod testing at the time this event occurred. RCS temperature was decreasing due to Terry turbine testing which was being performed at the same time. The reactor trip breakers were opened when the operators identified RCS temperature below 551 degrees. The RCS temperature was returned to above 551 degrees. This temperature limit is specified in Millstone 3 FSAR section 15.4.1, "Uncontrolled rod cluster control assembly bank withdrawal from a subcritical or low power startup condition".</br>The licensee notified state and local authorities.</br>* * * RETRACTION FROM WILLIAM BARTRON TO DONALD NORWOOD AT 1053 EDT ON 5/23/2013 * * *</br>The purpose of this call is to retract the report made on May 17, 2013, Event Number 49047.</br>Upon further review, the condition in which Reactor Coolant System (RCS) temperature decreased below a procedural limit while in Mode 3 did not result in an unanalyzed condition. Engineers verified that RCS boron concentration was sufficiently high that criticality could not have occurred during any inadvertent control rod withdrawal. The details of the engineering review have been provided to the NRC Senior Resident Inspector.</br>Notified R1DO (Gray). Resident Inspector.
Notified R1DO (Gray). +
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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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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08:39:00, 17 May 2013 +
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.