Report a Safety Concern
Search

The U.S. Nuclear Regulatory Commission is in the process of rescinding or revising guidance and policies posted on this webpage in accordance with Executive Order 14151 Ending Radical and Wasteful Government DEI Programs and Preferencing, and Executive Order 14168 Defending Women From Gender Ideology Extremism and Restoring Biological Truth to the Federal Government. In the interim, any previously issued diversity, equity, inclusion, or gender-related guidance on this webpage should be considered rescinded that is inconsistent with these Executive Orders.

Home NRC Library Document Collections Events, Reports Associated with Event Notification Reports 2025

Event Notification Report for May 19, 2025

U.S. Nuclear Regulatory Commission
Operations Center

EVENT REPORTS FOR
05/16/2025 - 05/19/2025

EVENT NUMBERS
57708 57711
Power Reactor
Event Number: 57708
Facility: Seabrook
Region: 1     State: NH
Unit: [1] [] []
RX Type: [1] W-4-LP
NRC Notified By: Matthew Moscone
HQ OPS Officer: Jordan Wingate
Notification Date: 05/15/2025
Notification Time: 15:30 [ET]
Event Date: 05/15/2025
Event Time: 08:20 [EDT]
Last Update Date: 05/15/2025
Emergency Class: Non Emergency
10 CFR Section:
26.719 - Fitness For Duty
Person (Organization):
Dentel, Glenn (R1DO)
FFD Group, (EMAIL)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 100
Event Text
FITNESS FOR DUTY

The following information was provided by the licensee via phone and email:

"At 0820 EDT on May 15, 2025, it was determined that a NextEra Energy Seabrook non-licensed supervisor failed a test specified by the Fitness For Duty testing program. The individual's unescorted access has been terminated. This event is being reported pursuant to 10 CFR 26.719(b)(2)(ii).

"The NRC Resident Inspector has been notified."


Power Reactor
Event Number: 57711
Facility: Oconee
Region: 2     State: SC
Unit: [2] [3] []
RX Type: [1] B&W-L-LP,[2] B&W-L-LP,[3] B&W-L-LP
NRC Notified By: Alan Hoglen
HQ OPS Officer: Jordan Wingate
Notification Date: 05/15/2025
Notification Time: 18:54 [ET]
Event Date: 05/15/2025
Event Time: 18:28 [EDT]
Last Update Date: 05/16/2025
Emergency Class: Unusual Event
10 CFR Section:
50.72(a) (1) (i) - Emergency Declared
Person (Organization):
Desai, Binoy (R2DO)
Bowman, Greg (NRR)
Lara, Julio (R2RA)
Erlanger, Craig (NSIR)
Grant, Jeffery (IR MOC)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
2 N Y 100 100
3 N Y 100 100
Event Text
UNUSUAL EVENT - LOSS OF ALL OFFSITE POWER

The following information was provided by the licensee via phone and email:

At time 1828 EDT on 5/15/25, Oconee declared an Unusual Event (SU1.1) due to a loss of all offsite power for greater than 15 minutes. This occurred when the site lost their startup transformers (CT 2&3). At the time of the event, the site was restoring from switchyard maintenance and was experiencing a loss of their overhead powerline from the Keowee Hydropower Station. The underground powerline remains operable as a source of emergency power.

Units 1, 2, and 3 remain at 100 percent power with Unit 1 being unaffected by this event. Units 2 and 3 are being powered by their auxiliary transformers.

State and local agencies were notified. The NRC Resident Inspector has been notified.

Notified DHS SWO, FEMA Operations Center, CISA Central Watch Officer, FEMA NWC, DHS Nuclear SSA (email), CWMD Watch Desk (email).

* * * UPDATE ON 5/16/2025 AT 0052 EDT FROM ALAN HOGLEN TO SAMUEL COLVARD * * *

At time 0045, on 5/16/25, Oconee terminated their Unusual Event (SU1.1) due to restoring offsite power (CT 2&3 have been restored).

The NRC Senior Resident Inspector has been informed.

Notified R2DO (Desai), IR MOC (Grant), NRR EO (Felts).
External notifications: DHS SWO, FEMA Operations Center, CISA Central Watch Officer, FEMA NWC, DHS Nuclear SSA (email), CWMD Watch Desk (email).