Event Notification Report for May 25, 2022
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
05/24/2022 - 05/25/2022
EVENT NUMBERS
55918
55918
Power Reactor
Event Number: 55918
Facility: South Texas
Region: 4 State: TX
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Dave Wurtz
HQ OPS Officer: Brian P. Smith
Region: 4 State: TX
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Dave Wurtz
HQ OPS Officer: Brian P. Smith
Notification Date: 05/27/2022
Notification Time: 22:53 [ET]
Event Date: 05/25/2022
Event Time: 13:54 [CDT]
Last Update Date: 05/27/2022
Notification Time: 22:53 [ET]
Event Date: 05/25/2022
Event Time: 13:54 [CDT]
Last Update Date: 05/27/2022
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(xi) - Offsite Notification
10 CFR Section:
50.72(b)(2)(xi) - Offsite Notification
Person (Organization):
Pick, Greg (R4DO)
Pick, Greg (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
OFFSITE NOTIFICATION FOR INADVERTENT DISCHARGE OF HALON
The following information was provided by the licensee via email:
"On 5/25/2022 at 1354 [CDT], during the replacement of two detectors, a halon actuation occurred which resulted in an unintentional release of approximately 384 pounds of halon gas into an enclosed room in the Unit 1 Electrical Auxiliary Building. There was no impact to plant operations or plant personnel. The room was verified by station Safety Personnel to be safe for normal access.
"On 5/27/2022 at 2038 [CDT], Region 12 (Houston) of the Texas Commission of Environmental Quality (TCEQ) was notified of an event which met the requirements of "Emission Event" for the TCEQ of a halon release that exceeded the reportable quantity threshold of 100 pounds in a 24 hour period. The halon discharge was contained within the site protected area. Therefore, this event is not significant with respect to the health and safety of the public.
"The licensee has notified the NRC Resident Inspector."
The following information was provided by the licensee via email:
"On 5/25/2022 at 1354 [CDT], during the replacement of two detectors, a halon actuation occurred which resulted in an unintentional release of approximately 384 pounds of halon gas into an enclosed room in the Unit 1 Electrical Auxiliary Building. There was no impact to plant operations or plant personnel. The room was verified by station Safety Personnel to be safe for normal access.
"On 5/27/2022 at 2038 [CDT], Region 12 (Houston) of the Texas Commission of Environmental Quality (TCEQ) was notified of an event which met the requirements of "Emission Event" for the TCEQ of a halon release that exceeded the reportable quantity threshold of 100 pounds in a 24 hour period. The halon discharge was contained within the site protected area. Therefore, this event is not significant with respect to the health and safety of the public.
"The licensee has notified the NRC Resident Inspector."