Event Notification Report for January 22, 2011
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
01/21/2011 - 01/22/2011
EVENT NUMBERS
46564
Power Reactor
Event Number: 46564
Facility: PALISADES
Region: 3 State: MI
Unit: [1] [] []
RX Type: [1] CE
NRC Notified By: GREG SMITH
HQ OPS Officer: BILL HUFFMAN
Region: 3 State: MI
Unit: [1] [] []
RX Type: [1] CE
NRC Notified By: GREG SMITH
HQ OPS Officer: BILL HUFFMAN
Notification Date: 01/22/2011
Notification Time: 18:24 [ET]
Event Date: 01/22/2011
Event Time: 17:35 [EST]
Last Update Date: 01/22/2011
Notification Time: 18:24 [ET]
Event Date: 01/22/2011
Event Time: 17:35 [EST]
Last Update Date: 01/22/2011
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):
TAMARA BLOOMER (R3DO)
TAMARA BLOOMER (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | A/R | Y | 100 | Power Operation | 0 | Hot Standby |
AUTOMATIC REACTOR TRIP DUE TO LOSS OF GENERATOR LOAD
The licensee reported a loss of main generator load at full power resulting in a generator trip, turbine trip, and reactor trip. All rods fully inserted. All safety systems functioned as required. The reactor is stable at no-load temperature and pressure in Hot Standby. Auxiliary feedwater started as expected and is currently supplying cooling water to the steam generators. Decay heat is being removed via the atmospheric steam dumps because the turbine bypass system did not respond as expected. There is no known primary to secondary generator leakage The grid is stable and the plant is in a normal post-trip electrical lineup. The reactor trip was characterized as uncomplicated.
The cause of the loss of generator load is not yet known and under investigation. The licensee has notified the NRC Resident Inspector. The local County Sheriff was notified of the use of the atmospheric steam dumps to alleviate any concern from local population in the vicinity of the plant.
The licensee reported a loss of main generator load at full power resulting in a generator trip, turbine trip, and reactor trip. All rods fully inserted. All safety systems functioned as required. The reactor is stable at no-load temperature and pressure in Hot Standby. Auxiliary feedwater started as expected and is currently supplying cooling water to the steam generators. Decay heat is being removed via the atmospheric steam dumps because the turbine bypass system did not respond as expected. There is no known primary to secondary generator leakage The grid is stable and the plant is in a normal post-trip electrical lineup. The reactor trip was characterized as uncomplicated.
The cause of the loss of generator load is not yet known and under investigation. The licensee has notified the NRC Resident Inspector. The local County Sheriff was notified of the use of the atmospheric steam dumps to alleviate any concern from local population in the vicinity of the plant.