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The following information was provided by … The following information was provided by the licensee via phone and email:</br>At 0101 EST on 03/01/25, while shutting down for entry into a scheduled refueling outage, the station discovered that a single main steam isolation valve '4A MSIV' did not fully close on demand. All other equipment operated as expected. </br>This condition is being reported pursuant to 10 CFR 50.72(b)(3)(v). </br>The NRC Resident Inspector has been notified.</br>The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:</br>Unit 4 will remain in mode 4 until corrected. The MSIV was closed by isolating instrument air. </br>* * * RETRACTION ON 03/06/2025 AT 2023 FROM BOB MURELL TO ROBERT THOMPSON * * *</br>The following information was provided by Florida Power and Light (FPL) via phone and email:</br>The purpose of this notification is to retract EN 57578. Notification of the event to the NRC was initially made as a result of a single main steam isolation valve (MSIV). The `4A' MSIV failed to fully close on demand during a planned refueling outage shutdown. </br>Subsequent to the initial report, FPL has concluded that the '4A' MSIV would have fully closed during an accident scenario based on steam flows that would have been present. </br>Therefore, this event is not considered an event or condition that could have prevented fulfillment of a safety function and is not reportable to the NRC pursuant (to) 10 CFR 50.72(b)(3)(v)(D). </br>The NRC resident inspector has been notified.</br>Notified R2DO (Penmetsa).s been notified.
Notified R2DO (Penmetsa). +
06:01:00, 1 March 2025 +
57,578 +
05:30:00, 1 March 2025 +
06:01:00, 1 March 2025 +
The following information was provided by … The following information was provided by the licensee via phone and email:</br>At 0101 EST on 03/01/25, while shutting down for entry into a scheduled refueling outage, the station discovered that a single main steam isolation valve '4A MSIV' did not fully close on demand. All other equipment operated as expected. </br>This condition is being reported pursuant to 10 CFR 50.72(b)(3)(v). </br>The NRC Resident Inspector has been notified.</br>The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:</br>Unit 4 will remain in mode 4 until corrected. The MSIV was closed by isolating instrument air. </br>* * * RETRACTION ON 03/06/2025 AT 2023 FROM BOB MURELL TO ROBERT THOMPSON * * *</br>The following information was provided by Florida Power and Light (FPL) via phone and email:</br>The purpose of this notification is to retract EN 57578. Notification of the event to the NRC was initially made as a result of a single main steam isolation valve (MSIV). The `4A' MSIV failed to fully close on demand during a planned refueling outage shutdown. </br>Subsequent to the initial report, FPL has concluded that the '4A' MSIV would have fully closed during an accident scenario based on steam flows that would have been present. </br>Therefore, this event is not considered an event or condition that could have prevented fulfillment of a safety function and is not reportable to the NRC pursuant (to) 10 CFR 50.72(b)(3)(v)(D). </br>The NRC resident inspector has been notified.</br>Notified R2DO (Penmetsa).s been notified.
Notified R2DO (Penmetsa). +
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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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