Event Notification Report for September 05, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
09/04/2025 - 09/05/2025
Power Reactor
Event Number: 57905
Facility: Quad Cities
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-3,[2] GE-3
NRC Notified By: Tom Boyle
HQ OPS Officer: Jordan Wingate
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-3,[2] GE-3
NRC Notified By: Tom Boyle
HQ OPS Officer: Jordan Wingate
Notification Date: 09/05/2025
Notification Time: 03:42 [ET]
Event Date: 09/05/2025
Event Time: 01:30 [CDT]
Last Update Date: 09/05/2025
Notification Time: 03:42 [ET]
Event Date: 09/05/2025
Event Time: 01:30 [CDT]
Last Update Date: 09/05/2025
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):
Stoedter, Karla (R3DO)
Stoedter, Karla (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
HIGH PRESSURE COOLANT INJECTION INOPERABLE
The following information was provided by the licensee via phone and email:
"At 0130 CDT on September 5, 2025, it was discovered that the single train high pressure coolant injection (HPCI) system was inoperable. Due to this inoperability, the system was in a condition that could have prevented the fulfilment of a safety function. Therefore, this condition is being reported as an 8-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D).
"Unit 1 reactor core isolation cooling was operable during this time period. There was no impact on the health and safety of the public or plant personnel.
"The NRC Resident Inspector has been notified. The Illinois Emergency Management Agency has been notified."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The inoperability was caused by a malfunctioning turbine steam admission valve during a surveillance. Unit 1 is in a 14-day limiting condition for operations.
The following information was provided by the licensee via phone and email:
"At 0130 CDT on September 5, 2025, it was discovered that the single train high pressure coolant injection (HPCI) system was inoperable. Due to this inoperability, the system was in a condition that could have prevented the fulfilment of a safety function. Therefore, this condition is being reported as an 8-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D).
"Unit 1 reactor core isolation cooling was operable during this time period. There was no impact on the health and safety of the public or plant personnel.
"The NRC Resident Inspector has been notified. The Illinois Emergency Management Agency has been notified."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The inoperability was caused by a malfunctioning turbine steam admission valve during a surveillance. Unit 1 is in a 14-day limiting condition for operations.
Power Reactor
Event Number: 57906
Facility: Catawba
Region: 2 State: SC
Unit: [2] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Aaron Michalski
HQ OPS Officer: Kerby Scales
Region: 2 State: SC
Unit: [2] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Aaron Michalski
HQ OPS Officer: Kerby Scales
Notification Date: 09/05/2025
Notification Time: 16:51 [ET]
Event Date: 09/05/2025
Event Time: 09:09 [EDT]
Last Update Date: 09/05/2025
Notification Time: 16:51 [ET]
Event Date: 09/05/2025
Event Time: 09:09 [EDT]
Last Update Date: 09/05/2025
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(ii)(A) - Degraded Condition
10 CFR Section:
50.72(b)(3)(ii)(A) - Degraded Condition
Person (Organization):
Bacon, Daniel (R2DO)
Bacon, Daniel (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | N | 0 | Hot Shutdown | 0 | Hot Shutdown |
DEGRADED CONDITION
The following information was provided by the licensee via phone and email:
"At 0909 EDT on September 5, 2025, with the unit shut down for a scheduled refueling outage it was determined the reactor coolant system barrier had a through wall flaw with leakage. The leakage is minor in nature and unquantifiable. The leakage is coming from a welded connection upstream of a 1-inch vent valve on the chemical and volume control system letdown line. The leak was isolated in accordance with plant technical specifications.
"This event is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(ii)(A). There was no impact on the health and safety of the public or plant personnel.
"The NRC Resident Inspector has been notified."
The following information was provided by the licensee via phone and email:
"At 0909 EDT on September 5, 2025, with the unit shut down for a scheduled refueling outage it was determined the reactor coolant system barrier had a through wall flaw with leakage. The leakage is minor in nature and unquantifiable. The leakage is coming from a welded connection upstream of a 1-inch vent valve on the chemical and volume control system letdown line. The leak was isolated in accordance with plant technical specifications.
"This event is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(ii)(A). There was no impact on the health and safety of the public or plant personnel.
"The NRC Resident Inspector has been notified."