Event Notification Report for August 27, 2018
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
08/26/2018 - 08/27/2018
Power Reactor
Event Number: 53566
Facility: GRAND GULF
Region: 4 State: MS
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: JAY COMFORT
HQ OPS Officer: BRIAN LIN
Region: 4 State: MS
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: JAY COMFORT
HQ OPS Officer: BRIAN LIN
Notification Date: 08/27/2018
Notification Time: 13:15 [ET]
Event Date: 08/27/2018
Event Time: 09:18 [CDT]
Last Update Date: 08/27/2018
Notification Time: 13:15 [ET]
Event Date: 08/27/2018
Event Time: 09:18 [CDT]
Last Update Date: 08/27/2018
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):
NICK TAYLOR (R4DO)
NICK TAYLOR (R4DO)
| 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
"On 27 August 2018 at 0918 CDT Grand Gulf Control Room was informed that the onsite credit union silent alarm was actuated. The credit union is located outside of the Secure Owner Controlled Area (SOCA), but is located within the Owner Controlled Area.
"GGNS [Grand Gulf Nuclear Station] Security entered an elevated security position at 0920 [CDT] and requested assistance from local law enforcement. Claiborne County Sheriff's Department responded to the site. Investigation of the area conducted with the assistance of GGNS Security personnel determined that the cause of the notification was not valid. GGNS Security stood down from the elevated security positon at 0945 [CDT].
"Pursuant to 10 CFR 50.72(b)(2)(xi), this issue is being reported as any event or situation, related to the health and safety of the public or on-site 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."
"On 27 August 2018 at 0918 CDT Grand Gulf Control Room was informed that the onsite credit union silent alarm was actuated. The credit union is located outside of the Secure Owner Controlled Area (SOCA), but is located within the Owner Controlled Area.
"GGNS [Grand Gulf Nuclear Station] Security entered an elevated security position at 0920 [CDT] and requested assistance from local law enforcement. Claiborne County Sheriff's Department responded to the site. Investigation of the area conducted with the assistance of GGNS Security personnel determined that the cause of the notification was not valid. GGNS Security stood down from the elevated security positon at 0945 [CDT].
"Pursuant to 10 CFR 50.72(b)(2)(xi), this issue is being reported as any event or situation, related to the health and safety of the public or on-site 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: 53565
Facility: NINE MILE POINT
Region: 1 State: NY
Unit: [] [2] []
RX Type: [1] GE-2,[2] GE-5
NRC Notified By: HEATH STICKNEY
HQ OPS Officer: ANDREW WAUGH
Region: 1 State: NY
Unit: [] [2] []
RX Type: [1] GE-2,[2] GE-5
NRC Notified By: HEATH STICKNEY
HQ OPS Officer: ANDREW WAUGH
Notification Date: 08/27/2018
Notification Time: 03:12 [ET]
Event Date: 08/27/2018
Event Time: 00:33 [EDT]
Last Update Date: 08/28/2018
Notification Time: 03:12 [ET]
Event Date: 08/27/2018
Event Time: 00:33 [EDT]
Last Update Date: 08/28/2018
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):
DONNA JANDA (R1DO)
DONNA JANDA (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | A/R | Y | 100 | Power Operation | 0 | Hot Shutdown |
AUTOMATIC SCRAM DUE TO A GENERATOR TRIP
"At 0033 EDT Nine Mile Point Unit 2 experienced an automatic scram on high reactor pressure due to a turbine trip. The cause of the turbine trip was due to a generator trip. All control rods inserted. There were no safety system actuations. The cause of the generator trip is being investigated.
"This is a 4-Hour report for 10CFR50.72(b)(2)(iv)(B) RPS Actuation.
"The NRC Resident Inspector has been notified."
Decay heat is being removed via the main condenser. Reactor vessel water level is being maintained by the condensate and feedwater systems.
The licensee will be notifying the state of New York.
* * * UPDATE FROM DANIEL CIFONELLI TO HOWIE CROUCH AT 1653 EDT ON 8/28/18 * * *
After further review, the licensee has determined that the cause of the automatic scram was due to turbine control valve fast closure as a result of the turbine trip, not high reactor pressure, as originally reported.
The licensee has notified the NRC Resident Inspector.
Notified R1DO (Lilliendahl).
"At 0033 EDT Nine Mile Point Unit 2 experienced an automatic scram on high reactor pressure due to a turbine trip. The cause of the turbine trip was due to a generator trip. All control rods inserted. There were no safety system actuations. The cause of the generator trip is being investigated.
"This is a 4-Hour report for 10CFR50.72(b)(2)(iv)(B) RPS Actuation.
"The NRC Resident Inspector has been notified."
Decay heat is being removed via the main condenser. Reactor vessel water level is being maintained by the condensate and feedwater systems.
The licensee will be notifying the state of New York.
* * * UPDATE FROM DANIEL CIFONELLI TO HOWIE CROUCH AT 1653 EDT ON 8/28/18 * * *
After further review, the licensee has determined that the cause of the automatic scram was due to turbine control valve fast closure as a result of the turbine trip, not high reactor pressure, as originally reported.
The licensee has notified the NRC Resident Inspector.
Notified R1DO (Lilliendahl).