Browse wiki
Jump to navigation
Jump to search
The following information was provided by … The following information was provided by the licensee via phone and email:</br>Surry Unit 1 reactor automatically tripped at 1847 EDT on August 6, 2025, due to a spurious actuation of high consequence limiting safeguards train `B' (due to a false high containment pressure trip signal). Reactor coolant temperature is being maintained at 547 degrees Fahrenheit on the main steam dumps with main feedwater supplying the steam generators. </br>All systems operated as required. The trip was uncomplicated and all control rods fully inserted into the core. Reactor protection system, emergency core cooling system, auxiliary feedwater system, emergency diesel generators, phase I and phase II containment isolation signals all actuated as designed. Offsite power remains available. There is no impact to Surry Unit 2.</br>This notification is being made pursuant to 10 CFR 50.72(b)(2)(iv)(B) for 4-hour notification of reactor protection system activation and 10 CFR 50.72(b)(3)(iv)(A) for 8-hour notification of specified system actuation. The NRC Resident Inspector has been notified via cell phone.nspector has been notified via cell phone. +
22:47:00, 6 August 2025 +
21:17:00, 6 August 2025 +
22:47:00, 6 August 2025 +
The following information was provided by … The following information was provided by the licensee via phone and email:</br>Surry Unit 1 reactor automatically tripped at 1847 EDT on August 6, 2025, due to a spurious actuation of high consequence limiting safeguards train `B' (due to a false high containment pressure trip signal). Reactor coolant temperature is being maintained at 547 degrees Fahrenheit on the main steam dumps with main feedwater supplying the steam generators. </br>All systems operated as required. The trip was uncomplicated and all control rods fully inserted into the core. Reactor protection system, emergency core cooling system, auxiliary feedwater system, emergency diesel generators, phase I and phase II containment isolation signals all actuated as designed. Offsite power remains available. There is no impact to Surry Unit 2.</br>This notification is being made pursuant to 10 CFR 50.72(b)(2)(iv)(B) for 4-hour notification of reactor protection system activation and 10 CFR 50.72(b)(3)(iv)(A) for 8-hour notification of specified system actuation. The NRC Resident Inspector has been notified via cell phone.nspector has been notified via cell phone. +
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>.
100 +
00:00:00, 6 August 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>.
11:20:06, 8 August 2025 +
21:17:00, 6 August 2025 +
Processing error"Processing error" is a predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> and represents errors that appeared in connection with improper value annotations or input processing.
true +
-0.0625 d (-1.5 hours, -0.00893 weeks, -0.00205 months) +
22:47:00, 6 August 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.