Event Notification Report for September 13, 2024
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
09/12/2024 - 09/13/2024
EVENT NUMBERS
57321
57321
Power Reactor
Event Number: 57321
Facility: Byron
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Richard Bowman
HQ OPS Officer: Karen Cotton-Gross
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Richard Bowman
HQ OPS Officer: Karen Cotton-Gross
Notification Date: 09/13/2024
Notification Time: 13:54 [ET]
Event Date: 09/13/2024
Event Time: 08:23 [CDT]
Last Update Date: 09/13/2024
Notification Time: 13:54 [ET]
Event Date: 09/13/2024
Event Time: 08:23 [CDT]
Last Update Date: 09/13/2024
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):
Ziolkowski, Michael (R3DO)
Ziolkowski, Michael (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Refueling | 0 | Refueling |
EN Revision Imported Date: 9/17/2024
EN Revision Text: DEGRADED REACTOR VESSEL CLOSURE HEAD PENETRATION
The following information was provided by the licensee via phone and email:
"On 9/13/2024 at 0823 CDT, during the Byron Unit 1 refueling outage, it was determined that a previous overlay repair on penetration number 31 of the reactor vessel closure head was degraded because the results of a planned liquid penetrant test did not meet applicable acceptance criteria. Any required repairs will be completed in accordance with the ASME code of record prior to returning the vessel head to service. 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."
EN Revision Text: DEGRADED REACTOR VESSEL CLOSURE HEAD PENETRATION
The following information was provided by the licensee via phone and email:
"On 9/13/2024 at 0823 CDT, during the Byron Unit 1 refueling outage, it was determined that a previous overlay repair on penetration number 31 of the reactor vessel closure head was degraded because the results of a planned liquid penetrant test did not meet applicable acceptance criteria. Any required repairs will be completed in accordance with the ASME code of record prior to returning the vessel head to service. 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."