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Home NRC Library Document Collections Events, Reports Associated with Event Notification Reports 2024

Event Notification Report for December 06, 2024

U.S. Nuclear Regulatory Commission
Operations Center

EVENT REPORTS FOR
12/05/2024 - 12/06/2024

EVENT NUMBERS
57453 57454
Power Reactor
Event Number: 57453
Facility: Turkey Point
Region: 2     State: FL
Unit: [3] [] []
RX Type: [3] W-3-LP,[4] W-3-LP
NRC Notified By: Arturo Alvarez
HQ OPS Officer: Jon Lilliendahl
Notification Date: 12/04/2024
Notification Time: 13:24 [ET]
Event Date: 12/04/2024
Event Time: 10:33 [EST]
Last Update Date: 12/04/2024
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
Person (Organization):
Suber, Gregory (R2DO)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
3 A/R Y 100 Power Operation 0 Hot Standby
Event Text
AUTOMATIC REACTOR TRIP

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

"At 1033 EST on December 4, 2024, with Unit 3 in mode 1 at 100% power, the reactor automatically tripped in response to a reactor protection system channel failure while planned maintenance was in progress on a redundant channel. The plant is currently in mode 3. Decay heat is being removed by steam dumps to atmosphere. Unit 4 is unaffected. An actuation of the auxiliary feedwater system occurred and started as designed. An actuation of the emergency core cooling system (ECCS) occurred and started as designed. This event is being reported pursuant to 10 CFR 50.72(b)(2)(iv)(B), and 10 CFR 50.72(b)(3)(iv)(A).

"The NRC Resident Inspector has been notified."

The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:

The ECCS actuation included safety injection, residual heat removal, and emergency containment cooling. The cause of the trip and the ECCS actuation are under investigation. There are no indications of primary to secondary leakage.


Power Reactor
Event Number: 57454
Facility: Brunswick
Region: 2     State: NC
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: Chris Denton
HQ OPS Officer: Jon Lilliendahl
Notification Date: 12/04/2024
Notification Time: 19:01 [ET]
Event Date: 12/04/2024
Event Time: 16:40 [EST]
Last Update Date: 12/04/2024
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(C) - Pot Uncntrl Rad Rel
Person (Organization):
Suber, Gregory (R2DO)
Power Reactor Unit Info
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 Power Operation 100 Power Operation
Event Text
SECONDARY CONTAINMENT INOPERABLE

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

"At 1640 EST, on December 4, 2024, secondary containment was declared inoperable. This condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(C), as an event or condition that could have prevented fulfillment of a safety function.

"Secondary containment was declared inoperable due to a small hole discovered in the service water piping within secondary containment. The effective safety function was restored at 1730 EST by installation of a temporary repair and secondary containment has been restored to operable.

"There was no impact on the health and safety of the public or plant personnel.

"The NRC Resident Inspector has been notified."

Notified R2DO (Suber)