Event Notification Report for March 15, 2023
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
03/14/2023 - 03/15/2023
Power Reactor
Event Number: 56414
Facility: Vogtle 3/4
Region: 2 State: GA
Unit: [3] [] []
RX Type: [3] W-AP1000,[4] W-AP1000
NRC Notified By: Tommie Sweat
HQ OPS Officer: Kerby Scales
Region: 2 State: GA
Unit: [3] [] []
RX Type: [3] W-AP1000,[4] W-AP1000
NRC Notified By: Tommie Sweat
HQ OPS Officer: Kerby Scales
Notification Date: 03/16/2023
Notification Time: 01:26 [ET]
Event Date: 03/15/2023
Event Time: 21:57 [EDT]
Last Update Date: 03/16/2023
Notification Time: 01:26 [ET]
Event Date: 03/15/2023
Event Time: 21:57 [EDT]
Last Update Date: 03/16/2023
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS Actuation - Critical
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS Actuation - Critical
Person (Organization):
Miller, Mark (R2DO)
Miller, Mark (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | A/R | N | 18 | Power Operation | 0 | Hot Standby |
AUTOMATIC REACTOR TRIP
The following information was provided by the licensee via email:
"At 2157 EDT on 03/15/2023, with Unit 3 in Mode 1 at 18 percent power, the reactor automatically tripped due to the loss of two reactor coolant pumps when their electrical buses failed to transfer after a main generator excitation protective relay tripped.
"Operations responded and stabilized the plant. Decay heat is being removed by steam generator power operated relief valves. Units 1, 2, and 4 are not affected.
"Due to the Reactor Protection System actuation while critical, this event is being reported as a four-hour, nonemergency notification per 10 CFR 50.72(b)(2)(iv)(B).
"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."
The following information was provided by the licensee via email:
"At 2157 EDT on 03/15/2023, with Unit 3 in Mode 1 at 18 percent power, the reactor automatically tripped due to the loss of two reactor coolant pumps when their electrical buses failed to transfer after a main generator excitation protective relay tripped.
"Operations responded and stabilized the plant. Decay heat is being removed by steam generator power operated relief valves. Units 1, 2, and 4 are not affected.
"Due to the Reactor Protection System actuation while critical, this event is being reported as a four-hour, nonemergency notification per 10 CFR 50.72(b)(2)(iv)(B).
"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."
Power Reactor
Event Number: 56413
Facility: Davis Besse
Region: 3 State: OH
Unit: [1] [] []
RX Type: [1] B&W-R-LP
NRC Notified By: Jason Durnwald
HQ OPS Officer: Ernest West
Region: 3 State: OH
Unit: [1] [] []
RX Type: [1] B&W-R-LP
NRC Notified By: Jason Durnwald
HQ OPS Officer: Ernest West
Notification Date: 03/15/2023
Notification Time: 15:31 [ET]
Event Date: 03/15/2023
Event Time: 09:50 [EDT]
Last Update Date: 03/15/2023
Notification Time: 15:31 [ET]
Event Date: 03/15/2023
Event Time: 09:50 [EDT]
Last Update Date: 03/15/2023
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):
Nguyen, April (R3DO)
Nguyen, April (R3DO)
| 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 OF INADVERTENT ACTUATION OF EMERGENCY SIRENS
The following information was provided by the licensee via email:
"At 0950 [EDT] on 3/15/23, the Ottawa County emergency warning siren system was activated. The county issued a press release to state that the intent was to sound the sirens next week on Wednesday, 3/22/23, as part of Severe Weather Awareness Week. All 49 of the Davis-Besse Nuclear Power Station Offsite Emergency Notifications sirens in Ottawa County were sounded as part of the county's activation of the emergency warning siren system (of the 82 sirens total). This notification is being made solely as a four hour, non-emergency notification for a notification of other government agencies in accordance with 10 CFR 50.72(b)(2)(xi). All emergency notification sirens functioned as required. The NRC Resident Inspector has been notified of the issue."
The following information was provided by the licensee via email:
"At 0950 [EDT] on 3/15/23, the Ottawa County emergency warning siren system was activated. The county issued a press release to state that the intent was to sound the sirens next week on Wednesday, 3/22/23, as part of Severe Weather Awareness Week. All 49 of the Davis-Besse Nuclear Power Station Offsite Emergency Notifications sirens in Ottawa County were sounded as part of the county's activation of the emergency warning siren system (of the 82 sirens total). This notification is being made solely as a four hour, non-emergency notification for a notification of other government agencies in accordance with 10 CFR 50.72(b)(2)(xi). All emergency notification sirens functioned as required. The NRC Resident Inspector has been notified of the issue."
Agreement State
Event Number: 56416
Rep Org: New Mexico Rad Control Program
Licensee: Chino Mines
Region: 4
City: Bayard State: NM
County:
License #: GA 045 47
Agreement: Y
Docket:
NRC Notified By: Carl Sullivan
HQ OPS Officer: Bill Gott
Licensee: Chino Mines
Region: 4
City: Bayard State: NM
County:
License #: GA 045 47
Agreement: Y
Docket:
NRC Notified By: Carl Sullivan
HQ OPS Officer: Bill Gott
Notification Date: 03/16/2023
Notification Time: 17:04 [ET]
Event Date: 03/15/2023
Event Time: 16:22 [MDT]
Last Update Date: 03/16/2023
Notification Time: 17:04 [ET]
Event Date: 03/15/2023
Event Time: 16:22 [MDT]
Last Update Date: 03/16/2023
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Kellar, Ray (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Kellar, Ray (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE REPORT - DENSITY GAUGE SHUTTER FAILURE
The following is a summary of the information provided by the New Mexico Radiation Control Bureau via telephone:
A Berthold Model LB7440 density gauge (serial number 2110) installed in a mine was discovered to have a shutter stuck in the open position while removing the gauge from service. The gauge contains a 20 millicurie Cs-137 source. The licensee installed shielding on the gauge and placed it in a storage container. Radiation surveys around the container are between 0.032 and 0.0525 millirem. An authorized service company is scheduled to repair the gauge on March 27, 2023.
The following is a summary of the information provided by the New Mexico Radiation Control Bureau via telephone:
A Berthold Model LB7440 density gauge (serial number 2110) installed in a mine was discovered to have a shutter stuck in the open position while removing the gauge from service. The gauge contains a 20 millicurie Cs-137 source. The licensee installed shielding on the gauge and placed it in a storage container. Radiation surveys around the container are between 0.032 and 0.0525 millirem. An authorized service company is scheduled to repair the gauge on March 27, 2023.