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The following information was provided by … The following information was provided by the licensee via phone and email:</br>At 1003 Central Standard Time (CST), with (Unit 1) in mode 5 at 0 percent power, an actuation of the 'A' emergency diesel generator (EDG) occurred when energizing main transformers from the switchyard for post-installation soak. The energization was coordinated with transmission system operators using approved procedures, however, grid conditions external to the substation allowed the voltage to drop below the NB01 undervoltage relay setpoint. The EDG automatically started as designed and picked up the loads on the NB01 bus. All safety systems responded as designed. Substation parameters immediately recovered to normal values, and all systems were restored to (normal) standby conditions. </br>This event is being reported in accordance with 10 CFR 50.72(b)(3)(iv)(A) as an event that results in a valid actuation of the 'A' EDG. There was no impact on the health and safety of the public or plant personnel. </br>The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified. +
16:03:00, 5 November 2025 +
58,026 +
16:44:00, 5 November 2025 +
16:03:00, 5 November 2025 +
The following information was provided by … The following information was provided by the licensee via phone and email:</br>At 1003 Central Standard Time (CST), with (Unit 1) in mode 5 at 0 percent power, an actuation of the 'A' emergency diesel generator (EDG) occurred when energizing main transformers from the switchyard for post-installation soak. The energization was coordinated with transmission system operators using approved procedures, however, grid conditions external to the substation allowed the voltage to drop below the NB01 undervoltage relay setpoint. The EDG automatically started as designed and picked up the loads on the NB01 bus. All safety systems responded as designed. Substation parameters immediately recovered to normal values, and all systems were restored to (normal) standby conditions. </br>This event is being reported in accordance with 10 CFR 50.72(b)(3)(iv)(A) as an event that results in a valid actuation of the 'A' EDG. There was no impact on the health and safety of the public or plant personnel. </br>The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified. +
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00:00:00, 5 November 2025 +
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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16:03:00, 5 November 2025 +
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