Event Notification Report for October 14, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
10/13/2025 - 10/14/2025
Fuel Cycle Facility
Event Number: 57989
Facility: Louisiana Energy Services
Region: 2 State: NM
Unit: [] [] []
RX Type:
Comments: Uranium Enrichment Facility
Gas Centrifuge Facility
NRC Notified By: Holly Harvey
HQ OPS Officer: Brian P. Smith
Region: 2 State: NM
Unit: [] [] []
RX Type:
Comments: Uranium Enrichment Facility
Gas Centrifuge Facility
NRC Notified By: Holly Harvey
HQ OPS Officer: Brian P. Smith
Notification Date: 10/15/2025
Notification Time: 17:52 [ET]
Event Date: 10/14/2025
Event Time: 15:30 [MDT]
Last Update Date: 10/15/2025
Notification Time: 17:52 [ET]
Event Date: 10/14/2025
Event Time: 15:30 [MDT]
Last Update Date: 10/15/2025
Emergency Class: Non Emergency
10 CFR Section:
PART 70 APP A (c) - Offsite Notification/News Rel
10 CFR Section:
PART 70 APP A (c) - Offsite Notification/News Rel
Person (Organization):
Mckown, Louis J (R2DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Mckown, Louis J (R2DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
CONCURRENT REPORT
The following information was provided by the licensee via phone and email:
"A 24-hour report was made to New Mexico Environment Department in accordance with discharge permit condition 30 and New Mexico Administrative Code (NMAC) 20.6.2.1203 on 10/15/2025 for an unauthorized discharge. This is a concurrent report in accordance with 10 CFR 70 Appendix A(c). On 10/14/2025, work to empty laboratory rinse water into an approved discharge route commenced in accordance with procedure. This routes the rinse water to a lined retention pond, as approved in Urenco USA's discharge permit. During transfer of the rinse water, it was identified that the rinse water was not being put into the intended location. It was determined that it was being put into a cement vault for a domestic water flowmeter. The contents of the tote are approximately 330 gallons of rinse waster from non-radiological labware for reagent preparation from the chemistry laboratory, containing primarily deionized water with dilute acids, detergents, and neutralized with sodium bicarbonate. It was analyzed to be within allowable limits for uranium concentration and pH in accordance with the discharge permit and NMAC 20.6.2.3103, prior to removal from the laboratory. This event has been put into the corrective action program and corrective actions are ongoing."
The following information was provided by the licensee via phone and email:
"A 24-hour report was made to New Mexico Environment Department in accordance with discharge permit condition 30 and New Mexico Administrative Code (NMAC) 20.6.2.1203 on 10/15/2025 for an unauthorized discharge. This is a concurrent report in accordance with 10 CFR 70 Appendix A(c). On 10/14/2025, work to empty laboratory rinse water into an approved discharge route commenced in accordance with procedure. This routes the rinse water to a lined retention pond, as approved in Urenco USA's discharge permit. During transfer of the rinse water, it was identified that the rinse water was not being put into the intended location. It was determined that it was being put into a cement vault for a domestic water flowmeter. The contents of the tote are approximately 330 gallons of rinse waster from non-radiological labware for reagent preparation from the chemistry laboratory, containing primarily deionized water with dilute acids, detergents, and neutralized with sodium bicarbonate. It was analyzed to be within allowable limits for uranium concentration and pH in accordance with the discharge permit and NMAC 20.6.2.3103, prior to removal from the laboratory. This event has been put into the corrective action program and corrective actions are ongoing."
Power Reactor
Event Number: 57986
Facility: South Texas
Region: 4 State: TX
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Chris F. Van Fleet
HQ OPS Officer: Ernest West
Region: 4 State: TX
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Chris F. Van Fleet
HQ OPS Officer: Ernest West
Notification Date: 10/14/2025
Notification Time: 00:58 [ET]
Event Date: 10/14/2025
Event Time: 23:05 [CDT]
Last Update Date: 10/14/2025
Notification Time: 00:58 [ET]
Event Date: 10/14/2025
Event Time: 23:05 [CDT]
Last Update Date: 10/14/2025
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):
Miller, Geoffrey (R4DO)
Brochman, Philip (NRR EO) (NRR EO)
Grant, Jeffery (IR MOC) (IR)
Gasperson, David (OPA) (OPA)
Miller, Geoffrey (R4DO)
Brochman, Philip (NRR EO) (NRR EO)
Grant, Jeffery (IR MOC) (IR)
Gasperson, David (OPA) (OPA)
| 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 | N | 0 | Defueled | 0 | Defueled |
OFFSITE NOTIFICATION
The following is a summary of information that was provided by the licensee via phone and email:
On October 13, 2025, at 2305 CDT, South Texas Project issued a press release on the threat of a potential security concern directed against the licensee's facility and the resultant declaration of an Unusual Event. This media release was reported to the NRC in accordance with 10 CFR 50.72(b)(2)(xi): Any event or situation, related to the health and safety of the public or onsite personnel, or protection of the environment, for which a news release is planned or notification to other government agencies has been or will be made.
The following is a summary of information that was provided by the licensee via phone and email:
On October 13, 2025, at 2305 CDT, South Texas Project issued a press release on the threat of a potential security concern directed against the licensee's facility and the resultant declaration of an Unusual Event. This media release was reported to the NRC in accordance with 10 CFR 50.72(b)(2)(xi): Any event or situation, related to the health and safety of the public or onsite personnel, or protection of the environment, for which a news release is planned or notification to other government agencies has been or will be made.
Power Reactor
Event Number: 57987
Facility: Summer
Region: 2 State: SC
Unit: [1] [] []
RX Type: [1] W-3-LP,[2] W-AP1000,[3] W-AP1000
NRC Notified By: Lauren Anderson
HQ OPS Officer: Brian P. Smith
Region: 2 State: SC
Unit: [1] [] []
RX Type: [1] W-3-LP,[2] W-AP1000,[3] W-AP1000
NRC Notified By: Lauren Anderson
HQ OPS Officer: Brian P. Smith
Notification Date: 10/14/2025
Notification Time: 17:47 [ET]
Event Date: 10/14/2025
Event Time: 15:52 [EDT]
Last Update Date: 10/25/2025
Notification Time: 17:47 [ET]
Event Date: 10/14/2025
Event Time: 15:52 [EDT]
Last Update Date: 10/25/2025
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS Actuation - Critical 50.72(b)(3)(iv)(A) - Valid Specif Sys Actuation
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS Actuation - Critical 50.72(b)(3)(iv)(A) - Valid Specif Sys Actuation
Person (Organization):
Mckown, Louis J (R2DO)
Mckown, Louis J (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | A/R | Y | 100 | Power Operation | 0 | Hot Standby |
EN Revision Imported Date: 10/27/2025
EN Revision Text: AUTOMATIC REACTOR TRIP
The following information was provided by the licensee via phone and email:
"At 1552 EDT on October 14, 2025, with Unit 1 in mode 1 at 100 percent power, the reactor automatically tripped due to a turbine trip. The trip was not complex with all systems responding normally post-trip.
"Operations responded and stabilized the plant. Decay heat is being removed by the emergency feedwater system.
"Due to the reactor protection system actuation while critical, this event is being reported as a 4-hour, non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B) and an 8-hour, non-emergency notification per 10 CFR 50.72(b)(3)(iv)(A) for valid actuation of the reactor protection and emergency feedwater systems. 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:
A generator field breaker lockout occurred. In addition, a small fire was observed in the generator field breaker and extinguished in less than 15 minutes by the onsite fire brigade. The unit is stable in hot standby with emergency feedwater and main condenser steam dumps in-service.
EN Revision Text: AUTOMATIC REACTOR TRIP
The following information was provided by the licensee via phone and email:
"At 1552 EDT on October 14, 2025, with Unit 1 in mode 1 at 100 percent power, the reactor automatically tripped due to a turbine trip. The trip was not complex with all systems responding normally post-trip.
"Operations responded and stabilized the plant. Decay heat is being removed by the emergency feedwater system.
"Due to the reactor protection system actuation while critical, this event is being reported as a 4-hour, non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B) and an 8-hour, non-emergency notification per 10 CFR 50.72(b)(3)(iv)(A) for valid actuation of the reactor protection and emergency feedwater systems. 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:
A generator field breaker lockout occurred. In addition, a small fire was observed in the generator field breaker and extinguished in less than 15 minutes by the onsite fire brigade. The unit is stable in hot standby with emergency feedwater and main condenser steam dumps in-service.