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At 2302 (CDT) on April 2, 2016, with the p … At 2302 (CDT) on April 2, 2016, with the plant shutdown, (with) all control rods inserted in the reactor and while attempting to reset the reactor trip breakers to support outage activities (reset of the main turbine), the reactor trip breakers reopened. This was identified to be due to having both trains of Solid State Protection System (SSPS) out of service while in Mode 5. With both trains of SSPS out of service, a condition was met that would cause a reactor trip signal due to having a general warning condition on both trains. Per procedure, the control rods were incapable of withdrawal and fully inserted. Reactor Coolant System boron was 2280 ppm. There were no actuations as a result of the reactor trip breakers opening due to SSPS being removed from service.</br>The licensee will be notifying the NRC Resident Inspector.</br>* * * RETRACTION AT 1635 EDT ON 4/4/16 FROM TIM HOLLAND TO JEFF HERRERA * * * </br>At 0713 EDT on April 3, 2016, EN #51846 provided notification of a Reactor Protection System actuation as revealed by the reactor trip breakers opening. Upon further investigation, it has been determined that the system actuated during maintenance activities due to a reactor trip signal caused by both trains of the Solid State Protection System (SSPS) being in test. This signal was not in response to actual plant conditions or parameters satisfying the requirements for initiation of the system and was therefore invalid. As such, the notification made by EN #51846 for a valid actuation of a specified system is hereby retracted.</br>In addition, an editorial change to the first sentence of the original notification description is hereby made. The first sentence is revised to read as follows:</br>At 2303 EDT on April 2, 2016, with the plant shut down and all control rods inserted into the reactor, while attempting to reset the reactor trip breakers to support outage activities (reset of the main turbine), the reactor trip breakers reopened.</br>The NRC Resident Inspector will be notified.</br>Notified the R4DO (Kellar).l be notified.
Notified the R4DO (Kellar).
04:02:00, 3 April 2016 +
07:13:00, 3 April 2016 +
04:02:00, 3 April 2016 +
At 2302 (CDT) on April 2, 2016, with the p … At 2302 (CDT) on April 2, 2016, with the plant shutdown, (with) all control rods inserted in the reactor and while attempting to reset the reactor trip breakers to support outage activities (reset of the main turbine), the reactor trip breakers reopened. This was identified to be due to having both trains of Solid State Protection System (SSPS) out of service while in Mode 5. With both trains of SSPS out of service, a condition was met that would cause a reactor trip signal due to having a general warning condition on both trains. Per procedure, the control rods were incapable of withdrawal and fully inserted. Reactor Coolant System boron was 2280 ppm. There were no actuations as a result of the reactor trip breakers opening due to SSPS being removed from service.</br>The licensee will be notifying the NRC Resident Inspector.</br>* * * RETRACTION AT 1635 EDT ON 4/4/16 FROM TIM HOLLAND TO JEFF HERRERA * * * </br>At 0713 EDT on April 3, 2016, EN #51846 provided notification of a Reactor Protection System actuation as revealed by the reactor trip breakers opening. Upon further investigation, it has been determined that the system actuated during maintenance activities due to a reactor trip signal caused by both trains of the Solid State Protection System (SSPS) being in test. This signal was not in response to actual plant conditions or parameters satisfying the requirements for initiation of the system and was therefore invalid. As such, the notification made by EN #51846 for a valid actuation of a specified system is hereby retracted.</br>In addition, an editorial change to the first sentence of the original notification description is hereby made. The first sentence is revised to read as follows:</br>At 2303 EDT on April 2, 2016, with the plant shut down and all control rods inserted into the reactor, while attempting to reset the reactor trip breakers to support outage activities (reset of the main turbine), the reactor trip breakers reopened.</br>The NRC Resident Inspector will be notified.</br>Notified the R4DO (Kellar).l be notified.
Notified the R4DO (Kellar).
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00:00:00, 4 April 2016 +
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>.
22:16:42, 24 September 2017 +
07:13:00, 3 April 2016 +
false +
false +
0.133 d (3.18 hours, 0.0189 weeks, 0.00436 months) +
04:02:00, 3 April 2016 +
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.