Event Notification Report for July 07, 2024
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/06/2024 - 07/07/2024
EVENT NUMBERS
57211
57211
Power Reactor
Event Number: 57211
Facility: Byron
Region: 3 State: IL
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Peter Leonhardt
HQ OPS Officer: Ian Howard
Region: 3 State: IL
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Peter Leonhardt
HQ OPS Officer: Ian Howard
Notification Date: 07/07/2024
Notification Time: 23:12 [ET]
Event Date: 07/07/2024
Event Time: 14:40 [CDT]
Last Update Date: 07/07/2024
Notification Time: 23:12 [ET]
Event Date: 07/07/2024
Event Time: 14:40 [CDT]
Last Update Date: 07/07/2024
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):
Hartman, Tom (R3DO)
Hartman, Tom (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 |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
BOTH TRAINS OF CONTROL ROOM VENTILATION TEMPERATURE CONTROL SYSTEM INOPERABLE
The following information was provided by the licensee via phone and email:
"At 1440 CDT on 7/7/2024, it was discovered that both trains of the control room ventilation temperature control system 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).
"There was no impact on the health and safety of the public or plant personnel. The NRC resident inspector has been notified.
"One train of control room ventilation temperature control was restored to operable status at 1634 CDT on 7/7/2024."
The following information was provided by the licensee via phone and email:
"At 1440 CDT on 7/7/2024, it was discovered that both trains of the control room ventilation temperature control system 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).
"There was no impact on the health and safety of the public or plant personnel. The NRC resident inspector has been notified.
"One train of control room ventilation temperature control was restored to operable status at 1634 CDT on 7/7/2024."