Event Notification Report for March 02, 2015
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
03/01/2015 - 03/02/2015
Power Reactor
Event Number: 50856
Facility: SEQUOYAH
Region: 2 State: TN
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: TIM WOOD
HQ OPS Officer: MARK ABRAMOVITZ
Region: 2 State: TN
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: TIM WOOD
HQ OPS Officer: MARK ABRAMOVITZ
Notification Date: 03/02/2015
Notification Time: 10:22 [ET]
Event Date: 03/02/2015
Event Time: 06:45 [EST]
Last Update Date: 03/02/2015
Notification Time: 10:22 [ET]
Event Date: 03/02/2015
Event Time: 06:45 [EST]
Last Update Date: 03/02/2015
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
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
DEBORAH SEYMOUR (R2DO)
DEBORAH SEYMOUR (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | A/R | Y | 100 | Power Operation | 0 | Hot Standby |
AUTOMATIC REACTOR TRIP
"At 06:45 EST on 3/2/2015, Sequoyah Unit 2 reactor/turbine automatically tripped.
"Following the reactor trip, all safety-related equipment operated as designed. Auxiliary Feedwater automatically initiated as expected from the Feedwater Isolation Signal.
"Unit 2 is currently being maintained in Mode 3 at NOT/NOP [normal operating temperature and pressure], approximately 548 F and 2235 psig, with auxiliary feedwater supplying decay heat removal via the steam generators and condenser steam dumps.
"The immediate cause of the trip was a main generator C phase differential relay actuation. There was no associated work in progress related to this and all systems were normally aligned. It is currently not understood why the relay actuated.
"Current Temperature and Pressure - temperature is 548 degrees F and stable, pressure is 2235 psig and stable. There is no indication of any primary/secondary leakage. All rods are inserted. Electrical alignment is normal, supplied from Off-Site power. The 2B Emergency Diesel Generator is currently unavailable for planned maintenance and will be returned to service prior to unit restart. There is no operational impact to Unit 1. Unit 1 continues to operate in Mode 1 at 100%.
"There was no impact on public health and safety. Post-trip investigation is in progress and planned restart timeline has not yet been determined.
"The licensee notified the NRC Resident Inspector" and the state.
No primary or secondary safety valves lifted during this event.
"At 06:45 EST on 3/2/2015, Sequoyah Unit 2 reactor/turbine automatically tripped.
"Following the reactor trip, all safety-related equipment operated as designed. Auxiliary Feedwater automatically initiated as expected from the Feedwater Isolation Signal.
"Unit 2 is currently being maintained in Mode 3 at NOT/NOP [normal operating temperature and pressure], approximately 548 F and 2235 psig, with auxiliary feedwater supplying decay heat removal via the steam generators and condenser steam dumps.
"The immediate cause of the trip was a main generator C phase differential relay actuation. There was no associated work in progress related to this and all systems were normally aligned. It is currently not understood why the relay actuated.
"Current Temperature and Pressure - temperature is 548 degrees F and stable, pressure is 2235 psig and stable. There is no indication of any primary/secondary leakage. All rods are inserted. Electrical alignment is normal, supplied from Off-Site power. The 2B Emergency Diesel Generator is currently unavailable for planned maintenance and will be returned to service prior to unit restart. There is no operational impact to Unit 1. Unit 1 continues to operate in Mode 1 at 100%.
"There was no impact on public health and safety. Post-trip investigation is in progress and planned restart timeline has not yet been determined.
"The licensee notified the NRC Resident Inspector" and the state.
No primary or secondary safety valves lifted during this event.
Power Reactor
Event Number: 50857
Facility: VOGTLE
Region: 2 State: GA
Unit: [3] [4] []
RX Type: [3] W-AP1000,[4] W-AP1000
NRC Notified By: DANIEL MICKINAC
HQ OPS Officer: CHARLES TEAL
Region: 2 State: GA
Unit: [3] [4] []
RX Type: [3] W-AP1000,[4] W-AP1000
NRC Notified By: DANIEL MICKINAC
HQ OPS Officer: CHARLES TEAL
Notification Date: 03/02/2015
Notification Time: 18:31 [ET]
Event Date: 03/02/2015
Event Time: 08:25 [EST]
Last Update Date: 03/02/2015
Notification Time: 18:31 [ET]
Event Date: 03/02/2015
Event Time: 08:25 [EST]
Last Update Date: 03/02/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
26.719 - FITNESS FOR DUTY
10 CFR Section:
26.719 - FITNESS FOR DUTY
Person (Organization):
DEBORAH SEYMOUR (R2DO)
DEBORAH SEYMOUR (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | N | N | 0 | Under Construction | 0 | Under Construction |
| 4 | N | N | 0 | Under Construction | 0 | Under Construction |
NON-LICENSED SUPERVISORY CONTRACTOR TESTED POSITIVE FOR ALCOHOL
"On March 2, 2015, Southern Nuclear Operating Company (SNC) had a non-licensed supervisory contractor employee confirmed positive result for alcohol during a fitness-for-duty test. The contractor employee's unescorted access to the plant has been terminated."
The NRC Senior Resident Inspector has been informed.
"On March 2, 2015, Southern Nuclear Operating Company (SNC) had a non-licensed supervisory contractor employee confirmed positive result for alcohol during a fitness-for-duty test. The contractor employee's unescorted access to the plant has been terminated."
The NRC Senior Resident Inspector has been informed.
Fuel Cycle Facility
Event Number: 50858
Facility: HONEYWELL INTERNATIONAL, INC.
Region: 2 State: IL
Unit: [] [] []
RX Type: URANIUM HEXAFLUORIDE PRODUCTION
NRC Notified By: SEAN PATTERSON
HQ OPS Officer: MARK ABRAMOVITZ
Region: 2 State: IL
Unit: [] [] []
RX Type: URANIUM HEXAFLUORIDE PRODUCTION
NRC Notified By: SEAN PATTERSON
HQ OPS Officer: MARK ABRAMOVITZ
Notification Date: 03/03/2015
Notification Time: 09:33 [ET]
Event Date: 03/02/2015
Event Time: 09:20 [CST]
Last Update Date: 03/03/2015
Notification Time: 09:33 [ET]
Event Date: 03/02/2015
Event Time: 09:20 [CST]
Last Update Date: 03/03/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
40.60(b)(2) - SAFETY EQUIPMENT FAILURE
10 CFR Section:
40.60(b)(2) - SAFETY EQUIPMENT FAILURE
Person (Organization):
MARVIN SYKES (R2DO)
NMSS_EVENTS_NOTIFIC (EMAI)
DENNIS DAMON (NMSS)
MARVIN SYKES (R2DO)
NMSS_EVENTS_NOTIFIC (EMAI)
DENNIS DAMON (NMSS)
VACUUM PUMP SEAL WATER SUPPLY FAILURE
"The air monitoring vacuum pumps were disabled for approximately 70 minutes. The soft water supply to the air monitoring vacuum pump seals on the 2nd floor of the Feed Materials Building (FMB) was shut down for annual shut down. These pumps provide vacuum for the stack monitoring and personnel area monitoring systems in the FMB. While the soft water system was shut down a sanitary well water supply was being used for the vacuum pump seals. A restriction in the sanitary water supply line interrupted the flow to the pump seals. This caused the vacuum pumps to be shut down until a temporary water supply could be established. A temporary water supply was reestablished to the pump seals. The pumps were restored to service at approximately 1030 CST on 03/02/2015."
The licensee notified NRC Region II (Hickey) and will notify the state.
"The air monitoring vacuum pumps were disabled for approximately 70 minutes. The soft water supply to the air monitoring vacuum pump seals on the 2nd floor of the Feed Materials Building (FMB) was shut down for annual shut down. These pumps provide vacuum for the stack monitoring and personnel area monitoring systems in the FMB. While the soft water system was shut down a sanitary well water supply was being used for the vacuum pump seals. A restriction in the sanitary water supply line interrupted the flow to the pump seals. This caused the vacuum pumps to be shut down until a temporary water supply could be established. A temporary water supply was reestablished to the pump seals. The pumps were restored to service at approximately 1030 CST on 03/02/2015."
The licensee notified NRC Region II (Hickey) and will notify the state.