Event Notification Report for April 05, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/04/2025 - 04/05/2025
EVENT NUMBERS
57647
57647
Power Reactor
Event Number: 57647
Facility: Quad Cities
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-3,[2] GE-3
NRC Notified By: John Ellisor
HQ OPS Officer: Brian P. Smith
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-3,[2] GE-3
NRC Notified By: John Ellisor
HQ OPS Officer: Brian P. Smith
Notification Date: 04/05/2025
Notification Time: 12:33 [ET]
Event Date: 04/05/2025
Event Time: 04:00 [CDT]
Last Update Date: 04/05/2025
Notification Time: 12:33 [ET]
Event Date: 04/05/2025
Event Time: 04:00 [CDT]
Last Update Date: 04/05/2025
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):
Hills, David (R3DO)
Hills, David (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 |
BOTH TRAINS OF REACTOR BUILDING TO SUPPRESSION CHAMBER VACUUM BREAKERS INOPERABLE
?
The following information was provided by the licensee via phone and email:
"At 0400 CDT on 4/05/2025, it was discovered that both trains of reactor building to suppression chamber vacuum breakers were simultaneously 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). There was no impact on 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:
Both trains were restored to operable on discovery. The inoperability was a result of a configuration control issue following their refueling outage. The licensee will investigate the cause of the configuration control issue.
?
The following information was provided by the licensee via phone and email:
"At 0400 CDT on 4/05/2025, it was discovered that both trains of reactor building to suppression chamber vacuum breakers were simultaneously 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). There was no impact on 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:
Both trains were restored to operable on discovery. The inoperability was a result of a configuration control issue following their refueling outage. The licensee will investigate the cause of the configuration control issue.