Event Notification Report for November 17, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
11/16/2025 - 11/17/2025
Power Reactor
Event Number: 58042
Facility: Sequoyah
Region: 2 State: TN
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Brian Jaros
HQ OPS Officer: Sam Colvard
Region: 2 State: TN
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Brian Jaros
HQ OPS Officer: Sam Colvard
Notification Date: 11/17/2025
Notification Time: 16:05 [ET]
Event Date: 11/17/2025
Event Time: 09:11 [EST]
Last Update Date: 11/17/2025
Notification Time: 16:05 [ET]
Event Date: 11/17/2025
Event Time: 09:11 [EST]
Last Update Date: 11/17/2025
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
Mckown, Louis J (R2DO)
Mckown, Louis J (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 0 | Cold Shutdown | 0 | Cold Shutdown |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
EN Revision Imported Date: 11/20/2025
EN Revision Text: CONTROL ROOM EMERGENCY VENTILATION SYSTEM INOPERABLE
The following information was provided by the licensee via phone and email:
"At 0911 EST, on 11/17/2025, it was discovered that both trains of the control room emergency ventilation system were simultaneously inoperable due to an unauthorized door breach of a door in the control room envelope; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D). At 0913 EST, the door was closed, and both trains of the control room emergency ventilation system were restored to operable.
"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."
EN Revision Text: CONTROL ROOM EMERGENCY VENTILATION SYSTEM INOPERABLE
The following information was provided by the licensee via phone and email:
"At 0911 EST, on 11/17/2025, it was discovered that both trains of the control room emergency ventilation system were simultaneously inoperable due to an unauthorized door breach of a door in the control room envelope; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D). At 0913 EST, the door was closed, and both trains of the control room emergency ventilation system were restored to operable.
"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."
Power Reactor
Event Number: 58043
Facility: Dresden
Region: 3 State: IL
Unit: [2] [] []
RX Type: [2] GE-3,[3] GE-3
NRC Notified By: Bora Tuncer
HQ OPS Officer: Robert A. Thompson
Region: 3 State: IL
Unit: [2] [] []
RX Type: [2] GE-3,[3] GE-3
NRC Notified By: Bora Tuncer
HQ OPS Officer: Robert A. Thompson
Notification Date: 11/18/2025
Notification Time: 00:28 [ET]
Event Date: 11/17/2025
Event Time: 16:13 [CST]
Last Update Date: 11/18/2025
Notification Time: 00:28 [ET]
Event Date: 11/17/2025
Event Time: 16:13 [CST]
Last Update Date: 11/18/2025
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
Orlikowski, Robert (R3DO)
Orlikowski, Robert (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 2 | Startup | 2 | Startup |
HPCI INOPERABLE
The following information was provided by the licensee via phone and email:
"At 1613 CST on November 17, 2025, it was discovered that the single train of high pressure coolant injection (HPCI) was inoperable. Due to this inoperability, the system was in a condition that could have prevented the fulfillment of a safety function; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D). The isolation condenser was operable during this time period.
"There was no impact to the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
A fuse in the turbine stop valve circuit blew during initial system testing for unit startup.
The following information was provided by the licensee via phone and email:
"At 1613 CST on November 17, 2025, it was discovered that the single train of high pressure coolant injection (HPCI) was inoperable. Due to this inoperability, the system was in a condition that could have prevented the fulfillment of a safety function; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D). The isolation condenser was operable during this time period.
"There was no impact to the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
A fuse in the turbine stop valve circuit blew during initial system testing for unit startup.