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The following information was provided by … The following information was provided by the licensee via phone and email: "On September 24, 2025, at 1829 CDT, Comanche Peak, Unit 1, was manually tripped due to a trip of both main feed water (MFW) pumps. All auxiliary feedwater pumps started due to the trip of both MFW pumps. This event is being reported in accordance with 10 CFR 50.72(b)(2)(iv)(B) for a reactor trip and 10 CFR 50.72(b)(3)(iv)(A) for an actuation of auxiliary feedwater. Unit 1 is being maintained in mode 3 in accordance with integrated plant operating procedures. Decay heat is being rejected to the main condenser via the steam dump valves. The cause of both MFW pumps tripping is unknown and under investigation. "The NRC Resident Inspector was notified." The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance: No evolutions were ongoing at the time of the event.ons were ongoing at the time of the event. +
23:29:00, 24 September 2025 +
57,950 +
23:10:00, 24 September 2025 +
23:29:00, 24 September 2025 +
The following information was provided by … The following information was provided by the licensee via phone and email: "On September 24, 2025, at 1829 CDT, Comanche Peak, Unit 1, was manually tripped due to a trip of both main feed water (MFW) pumps. All auxiliary feedwater pumps started due to the trip of both MFW pumps. This event is being reported in accordance with 10 CFR 50.72(b)(2)(iv)(B) for a reactor trip and 10 CFR 50.72(b)(3)(iv)(A) for an actuation of auxiliary feedwater. Unit 1 is being maintained in mode 3 in accordance with integrated plant operating procedures. Decay heat is being rejected to the main condenser via the steam dump valves. The cause of both MFW pumps tripping is unknown and under investigation. "The NRC Resident Inspector was notified." The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance: No evolutions were ongoing at the time of the event.ons were ongoing at the time of the event. +
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00:00:00, 24 September 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>.
11:20:05, 26 September 2025 +
23:10:00, 24 September 2025 +
true +
true +
-0.0133 d (-0.32 hours, -0.0019 weeks, -4.38336e-4 months) +
23:29:00, 24 September 2025 +
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.