Event Notification Report for July 21, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/20/2025 - 07/21/2025
EVENT NUMBERS
57820
57820
Power Reactor
Event Number: 57820
Facility: River Bend
Region: 4 State: LA
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: Jason Fortenberry
HQ OPS Officer: Robert A. Thompson
Region: 4 State: LA
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: Jason Fortenberry
HQ OPS Officer: Robert A. Thompson
Notification Date: 07/21/2025
Notification Time: 22:51 [ET]
Event Date: 07/21/2025
Event Time: 15:48 [CDT]
Last Update Date: 07/21/2025
Notification Time: 22:51 [ET]
Event Date: 07/21/2025
Event Time: 15:48 [CDT]
Last Update Date: 07/21/2025
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(C) - Pot Uncntrl Rad Rel
10 CFR Section:
50.72(b)(3)(v)(C) - Pot Uncntrl Rad Rel
Person (Organization):
Drake, James (R4DO)
Drake, James (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
SECONDARY CONTAINMENT DOOR UNSECURED
The following information was provided by the licensee via phone and email:
"On July 21, 2025, at 1548 CDT, River Bend Station (RBS) was operating at 100 percent reactor power when the central alarm station received a door alarm indicating that PW123-01 was not fully secured. A security officer was dispatched and found the door closed with the dogs (latches) not engaged. The security officer fully engaged the dogs at 1551 CDT.
"PW123-01 is a secondary containment door. With the dogs not being engaged, secondary containment was inoperable for 3 minutes.
"This event is being reported under 10 CFR 50.72(b)(3)(v) as an event or condition that could have prevented fulfillment of a safety function due to the inoperability of secondary containment.
"The NRC Resident Inspector has been notified."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The licensee entered technical specification LCO 3.6.4.1 while the door was unsecured.
The following information was provided by the licensee via phone and email:
"On July 21, 2025, at 1548 CDT, River Bend Station (RBS) was operating at 100 percent reactor power when the central alarm station received a door alarm indicating that PW123-01 was not fully secured. A security officer was dispatched and found the door closed with the dogs (latches) not engaged. The security officer fully engaged the dogs at 1551 CDT.
"PW123-01 is a secondary containment door. With the dogs not being engaged, secondary containment was inoperable for 3 minutes.
"This event is being reported under 10 CFR 50.72(b)(3)(v) as an event or condition that could have prevented fulfillment of a safety function due to the inoperability of secondary containment.
"The NRC Resident Inspector has been notified."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The licensee entered technical specification LCO 3.6.4.1 while the door was unsecured.