Event Notification Report for October 11, 2018
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
10/10/2018 - 10/11/2018
Power Reactor
Event Number: 53662
Facility: SURRY
Region: 2 State: VA
Unit: [1] [] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: JEREMY RIDDICK
HQ OPS Officer: OSSY FONT
Region: 2 State: VA
Unit: [1] [] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: JEREMY RIDDICK
HQ OPS Officer: OSSY FONT
Notification Date: 10/12/2018
Notification Time: 01:14 [ET]
Event Date: 10/11/2018
Event Time: 00:00 [EDT]
Last Update Date: 10/12/2018
Notification Time: 01:14 [ET]
Event Date: 10/11/2018
Event Time: 00:00 [EDT]
Last Update Date: 10/12/2018
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):
ANTHONY MASTERS (R2DO)
ANTHONY MASTERS (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
ACTUATION OF EMERGENCY DIESEL GENERATOR DUE TO TRANSFORMER TRIP
"On 10/11/18 at 2304, with both Surry Units at 100% power, the 'A' Reserve Station Service Transformer (RSST) tripped on a pilot wire lockout. This resulted in electrical isolation of the 'A' RSST, the 'D' Transfer Bus and the Unit 1 'J' Emergency Bus. The #3 Emergency Diesel Generator (EDG) started and loaded on the Emergency Bus, as designed. Operations entered the appropriate Abnormal Procedures and stabilized the unit. All equipment operated as expected during the event.
"A report of a flash at the 'A' RSST was received (at approximately the time of the initiating event) but there were no reports of visible damage, smoke or fire from the RSST or any associated breakers on subsequent investigation. The #3 EDG is running with normal parameters.
"There was heavy wind/rain in the area associated with Tropical Storm Michael.
"All other electrical distribution systems are in a normal alignment.
"The organization is staffing to evaluate the lockout and required actions for recovery.
"No radiological consequences resulted from this event.
"This event is being reported IAW [in accordance with] 10 CFR 50.52(b)(3)(iv)(A) due to the actuation of the #3 EDG.
"The NRC Resident [Inspector] was notified"
"On 10/11/18 at 2304, with both Surry Units at 100% power, the 'A' Reserve Station Service Transformer (RSST) tripped on a pilot wire lockout. This resulted in electrical isolation of the 'A' RSST, the 'D' Transfer Bus and the Unit 1 'J' Emergency Bus. The #3 Emergency Diesel Generator (EDG) started and loaded on the Emergency Bus, as designed. Operations entered the appropriate Abnormal Procedures and stabilized the unit. All equipment operated as expected during the event.
"A report of a flash at the 'A' RSST was received (at approximately the time of the initiating event) but there were no reports of visible damage, smoke or fire from the RSST or any associated breakers on subsequent investigation. The #3 EDG is running with normal parameters.
"There was heavy wind/rain in the area associated with Tropical Storm Michael.
"All other electrical distribution systems are in a normal alignment.
"The organization is staffing to evaluate the lockout and required actions for recovery.
"No radiological consequences resulted from this event.
"This event is being reported IAW [in accordance with] 10 CFR 50.52(b)(3)(iv)(A) due to the actuation of the #3 EDG.
"The NRC Resident [Inspector] was notified"
Power Reactor
Event Number: 53663
Facility: CALVERT CLIFFS
Region: 1 State: MD
Unit: [] [2] []
RX Type: [1] CE,[2] CE
NRC Notified By: KEVIN DOUGHERTY
HQ OPS Officer: KAREN COTTON
Region: 1 State: MD
Unit: [] [2] []
RX Type: [1] CE,[2] CE
NRC Notified By: KEVIN DOUGHERTY
HQ OPS Officer: KAREN COTTON
Notification Date: 10/12/2018
Notification Time: 03:58 [ET]
Event Date: 10/11/2018
Event Time: 00:00 [EDT]
Last Update Date: 10/12/2018
Notification Time: 03:58 [ET]
Event Date: 10/11/2018
Event Time: 00:00 [EDT]
Last Update Date: 10/12/2018
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(ii)(B) - UNANALYZED CONDITION 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
10 CFR Section:
50.72(b)(3)(ii)(B) - UNANALYZED CONDITION 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
GLENN DENTEL (R1DO)
GLENN DENTEL (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
AIR START SOLENOID CLOSURE FAILURE
"During a post maintenance start of the 1B diesel generator, the air start solenoid valves did not close as expected. This resulted in lowering air pressure in the common air start headers causing inoperability of the 2A and 2B diesel generators at time 23:03. The 1B diesel generator was isolated from the common air start header, which restored the air start header pressure to the 2A and 2B diesel generators. The 2A and 2B diesel generators were declared operable at 23:34."
The NRC Resident Inspector was notified.
"During a post maintenance start of the 1B diesel generator, the air start solenoid valves did not close as expected. This resulted in lowering air pressure in the common air start headers causing inoperability of the 2A and 2B diesel generators at time 23:03. The 1B diesel generator was isolated from the common air start header, which restored the air start header pressure to the 2A and 2B diesel generators. The 2A and 2B diesel generators were declared operable at 23:34."
The NRC Resident Inspector was notified.