Event Notification Report for June 20, 2009
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/19/2009 - 06/20/2009
EVENT NUMBERS
45145
Power Reactor
Event Number: 45145
Facility: HATCH
Region: 2 State: GA
Unit: [] [2] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: ED BURKETT
HQ OPS Officer: JOE O'HARA
Region: 2 State: GA
Unit: [] [2] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: ED BURKETT
HQ OPS Officer: JOE O'HARA
Notification Date: 06/20/2009
Notification Time: 15:47 [ET]
Event Date: 06/20/2009
Event Time: 14:17 [EDT]
Last Update Date: 06/20/2009
Notification Time: 15:47 [ET]
Event Date: 06/20/2009
Event Time: 14:17 [EDT]
Last Update Date: 06/20/2009
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):
JONATHAN BARTLEY (R2DO)
JONATHAN BARTLEY (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 Shutdown |
AUTOMATIC REACTOR SCRAM FROM HIGH REACTOR PRESSURE SCRAM SIGNAL
"Plant Hatch Unit 2 experienced a full reactor scram from the main generator protection circuitry (generator runback circuit). Preliminary indications are that a main generator high temperature signal was received, initiating the generator protection (runback) circuitry and a high reactor pressure scram signal was received during the turbine/generator runback. Investigations into the cause of the generator high temperature signal are ongoing.
"Reactor water level was recovered using the reactor feed system, and reactor pressure was controlled using main turbine bypass valves. All control rods inserted, as expected, during the scram. Other than the cause of the main generator high temperature signal, all systems functioned as expected."
Unit is currently at 837 psig; 540 degrees F in Mode 3. Electrical system is in a normal lineup.
The licensee informed the NRC Resident Inspector.
"Plant Hatch Unit 2 experienced a full reactor scram from the main generator protection circuitry (generator runback circuit). Preliminary indications are that a main generator high temperature signal was received, initiating the generator protection (runback) circuitry and a high reactor pressure scram signal was received during the turbine/generator runback. Investigations into the cause of the generator high temperature signal are ongoing.
"Reactor water level was recovered using the reactor feed system, and reactor pressure was controlled using main turbine bypass valves. All control rods inserted, as expected, during the scram. Other than the cause of the main generator high temperature signal, all systems functioned as expected."
Unit is currently at 837 psig; 540 degrees F in Mode 3. Electrical system is in a normal lineup.
The licensee informed the NRC Resident Inspector.