Browse wiki

Jump to navigation Jump to search
ENS 57655
Show incoming properties 
Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation +, 10 CFR 50.72(b)(3)(iv)(A), System Actuation +, 10 CFR 50.72#b2ivB +  and 10 CFR 50.72#b3ivA +
Current power
0  +
Description
The following information was provided by … The following information was provided by the licensee via phone and email:</br>On April 08, 2025, at 1607 CDT, River Bend Station (RBS) was operating at 81 percent reactor power when a manual reactor protection system (RPS) actuation was inserted due to the loss of all normal service water pumps. Standby service water initiated and operated as expected. The scram was uncomplicated and all other plant systems responded as designed. Immediately after the scram, a reactor water level 3 isolation signal was received as expected. </br>Reactor pressure is being maintained by the main turbine bypass valves. Reactor water level is being maintained by condensate and main feed water. RBS is currently in mode 3. No radiological releases have occurred due to this event. The loss of all normal service water is currently under investigation.</br>This event is being reported under 10 CFR 50.72(b)(2)(iv)(B) and 10 CFR 50.72(b)(3)(iv)(A), as an event or condition that results in actuation of the RPS while the reactor is critical and as a specified system actuation due to the expected reactor water level 3 isolation signal immediately following the reactor scram.</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>RBS intends to maintain temperature and pressure and remain in mode 3 while the event is under investigation. 3 while the event is under investigation.  +
Discovered date
21:07:00, 8 April 2025  +
ENS id number
57,655  +
Emergency class
Non Emergency +
Entered date
19:11:00, 8 April 2025  +
Event date
21:07:00, 8 April 2025  +
Event description
The following information was provided by … The following information was provided by the licensee via phone and email:</br>On April 08, 2025, at 1607 CDT, River Bend Station (RBS) was operating at 81 percent reactor power when a manual reactor protection system (RPS) actuation was inserted due to the loss of all normal service water pumps. Standby service water initiated and operated as expected. The scram was uncomplicated and all other plant systems responded as designed. Immediately after the scram, a reactor water level 3 isolation signal was received as expected. </br>Reactor pressure is being maintained by the main turbine bypass valves. Reactor water level is being maintained by condensate and main feed water. RBS is currently in mode 3. No radiological releases have occurred due to this event. The loss of all normal service water is currently under investigation.</br>This event is being reported under 10 CFR 50.72(b)(2)(iv)(B) and 10 CFR 50.72(b)(3)(iv)(A), as an event or condition that results in actuation of the RPS while the reactor is critical and as a specified system actuation due to the expected reactor water level 3 isolation signal immediately following the reactor scram.</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>RBS intends to maintain temperature and pressure and remain in mode 3 while the event is under investigation. 3 while the event is under investigation.  +
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>.
ENS 57655 +, ENS 57655 +, ENS 57655 +, ENS 57655 +, ENS 57655 +, ENS 57655 +, ENS 57655 +, ENS 57655 +, ENS 57655 +, ENS 57655 +, ENS 57655 +, ENS 57655 +, ENS 57655 +  and ENS 57655 +
Initial power
81  +
LER
05000458/LER-2025-001, Human Performance Error Results in Manual Reactor Trip +  and Human Performance Error Results in Manual Reactor Trip +
Last update date
00:00:00, 8 April 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>.
11:20:10, 10 April 2025  +
NRC officer
Jordan Wingate +
Notification date
19:11:00, 8 April 2025  +
Originated by
Jason Fortenberry +
Reactor critical
true  +
Reactor scram
true  +
Reactor type
GE-6 +
Region
NRC Region 4 +
Reporting criterion
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation +  and 10 CFR 50.72(b)(3)(iv)(A), System Actuation +
Reporting time
-0.0804 d (-1.93 hours, -0.0115 weeks, -0.00264 months)  +
Scram
Manual Scram +
Site
River Bend +
Start date
21:07:00, 8 April 2025  +
State
Louisiana +
System
Reactor Protection System +  and Service water +
Title
Manual Reactor Scram  +
Turbine component
Turbine bypass valve +
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.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2025/20250410en.html#en57655  +
Unit
1  +
 
Retrieved from "https://kanterella.com/Special:Browse/:ENS-2057655"