Event Notification Report for May 11, 2024
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
05/10/2024 - 05/11/2024
Power Reactor
Event Number: 57122
Facility: Waterford
Region: 4 State: LA
Unit: [3] [] []
RX Type: [3] CE
NRC Notified By: Jordan Unger
HQ OPS Officer: Tenisha Meadows
Region: 4 State: LA
Unit: [3] [] []
RX Type: [3] CE
NRC Notified By: Jordan Unger
HQ OPS Officer: Tenisha Meadows
Notification Date: 05/11/2024
Notification Time: 22:49 [ET]
Event Date: 05/11/2024
Event Time: 16:55 [CDT]
Last Update Date: 05/11/2024
Notification Time: 22:49 [ET]
Event Date: 05/11/2024
Event Time: 16:55 [CDT]
Last Update Date: 05/11/2024
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(iv)(A) - Valid Specif Sys Actuation
10 CFR Section:
50.72(b)(3)(iv)(A) - Valid Specif Sys Actuation
Person (Organization):
O'Keefe, Neil (R4DO)
O'Keefe, Neil (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | N | N | 0 | Hot Standby | 0 | Hot Standby |
ACTUATION OF REACTOR PROTECTION SYSTEM and EMERGENCY FEEDWATER SYSTEM
The following information was provided by the licensee via phone and email:
"At 1655 CDT, Waterford Steam Electric Station, Unit 3 was in Mode 3 with all control rod element assemblies (CEA) fully inserted with reactor trip circuit breakers closed and individual CEA disconnects open for plant startup. During the performance of emergency feedwater surveillance testing, reactor protection system (RPS) trip set point and emergency feedwater actuation system (EFAS) initiation set point for steam generator level low was exceeded for steam generator 1.
"Preliminary evaluation indicates that all plant systems functioned normally. The unit is currently stable in Mode 3. All control rods remain fully inserted.
"This event is being reported as a eight-hour non-emergency notification in accordance with 10 CFR 50.72(b)(3)(iv)(A) as valid actuation of the RPS and emergency feedwater systems. The NRC Resident Inspector has been notified."
The following information was provided by the licensee via phone and email:
"At 1655 CDT, Waterford Steam Electric Station, Unit 3 was in Mode 3 with all control rod element assemblies (CEA) fully inserted with reactor trip circuit breakers closed and individual CEA disconnects open for plant startup. During the performance of emergency feedwater surveillance testing, reactor protection system (RPS) trip set point and emergency feedwater actuation system (EFAS) initiation set point for steam generator level low was exceeded for steam generator 1.
"Preliminary evaluation indicates that all plant systems functioned normally. The unit is currently stable in Mode 3. All control rods remain fully inserted.
"This event is being reported as a eight-hour non-emergency notification in accordance with 10 CFR 50.72(b)(3)(iv)(A) as valid actuation of the RPS and emergency feedwater systems. The NRC Resident Inspector has been notified."
Power Reactor
Event Number: 57123
Facility: Arkansas Nuclear
Region: 4 State: AR
Unit: [1] [] []
RX Type: [1] B&W-L-LP,[2] CE
NRC Notified By: Mike Strobel
HQ OPS Officer: Ian Howard
Region: 4 State: AR
Unit: [1] [] []
RX Type: [1] B&W-L-LP,[2] CE
NRC Notified By: Mike Strobel
HQ OPS Officer: Ian Howard
Notification Date: 05/12/2024
Notification Time: 00:09 [ET]
Event Date: 05/11/2024
Event Time: 20:30 [CDT]
Last Update Date: 05/12/2024
Notification Time: 00:09 [ET]
Event Date: 05/11/2024
Event Time: 20:30 [CDT]
Last Update Date: 05/12/2024
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):
O'Keefe, Neil (R4DO)
O'Keefe, Neil (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Refueling | 0 | Refueling |
OFFSITE NOTIFICATION
The following information was provided by the licensee via fax, email, and phone:
"At 2030 CDT on May 11, 2024, Arkansas Nuclear One, Unit 1 (ANO-1) determined that the State of Arkansas should be notified after greater than 100 gallons of refueling canal water overflowed from the borated water storage tank (BWST) onto the ground inside the protected area outside the ANO-1 Auxiliary Building. The activity for transferring water from the ANO-1 refueling canal to the BWST was stopped and the tank level was lowered to stop the overflow. None of the spilled liquid was introduced into a storm drain or other pathway to Lake Dardanelle. This condition did not exceed any NRC regulations or reporting criteria.
"Arkansas Nuclear One, Unit 2 (ANO-2) was unaffected by this event.
"This notification is being made as a four-hour, non-emergency notification for a notification of other government agency in accordance with 10 CFR 50.72(b)(2)(xi).
"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:
The area where the liquid spill occurred is being controlled and a spill remediation plan is in progress.
The following information was provided by the licensee via fax, email, and phone:
"At 2030 CDT on May 11, 2024, Arkansas Nuclear One, Unit 1 (ANO-1) determined that the State of Arkansas should be notified after greater than 100 gallons of refueling canal water overflowed from the borated water storage tank (BWST) onto the ground inside the protected area outside the ANO-1 Auxiliary Building. The activity for transferring water from the ANO-1 refueling canal to the BWST was stopped and the tank level was lowered to stop the overflow. None of the spilled liquid was introduced into a storm drain or other pathway to Lake Dardanelle. This condition did not exceed any NRC regulations or reporting criteria.
"Arkansas Nuclear One, Unit 2 (ANO-2) was unaffected by this event.
"This notification is being made as a four-hour, non-emergency notification for a notification of other government agency in accordance with 10 CFR 50.72(b)(2)(xi).
"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:
The area where the liquid spill occurred is being controlled and a spill remediation plan is in progress.