Event Notification Report for June 12, 2010
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/11/2010 - 06/12/2010
EVENT NUMBERS
46003
Power Reactor
Event Number: 46003
Facility: MCGUIRE
Region: 2 State: NC
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: SCOTT MOSER
HQ OPS Officer: VINCE KLCO
Region: 2 State: NC
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: SCOTT MOSER
HQ OPS Officer: VINCE KLCO
Notification Date: 06/12/2010
Notification Time: 09:14 [ET]
Event Date: 06/12/2010
Event Time: 06:44 [EDT]
Last Update Date: 06/12/2010
Notification Time: 09:14 [ET]
Event Date: 06/12/2010
Event Time: 06:44 [EDT]
Last Update Date: 06/12/2010
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):
REBECCA NEASE (R2DO)
REBECCA NEASE (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | M/R | Y | 44 | Power Operation | 0 | Hot Standby |
MANUAL REACTOR TRIP DUE TO A CONTROL ROD DROP INDICATION
"McGuire Unit 1 was operating at 44% power due to a previously dropped control rod. Indication was received of a second control rod drop and the reactor was manually tripped in accordance with abnormal operating procedure guidance. All control rods fully inserted. The auxiliary feedwater system was manually started due to an approaching autostart setpoint. The unit is stable in Mode 3 at normal operating temperature and pressure.
"Normal containment air release remains in progress."
The steam generators are being fed through the auxiliary feedwater system and will transition to the normal feedwater system. Decay heat removal is to the condenser through the steam dumps. There was no impact on Unit 2. The licensee is investigating the cause of the control rod drop indication.
The licensee notified the NRC Resident Inspector.
"McGuire Unit 1 was operating at 44% power due to a previously dropped control rod. Indication was received of a second control rod drop and the reactor was manually tripped in accordance with abnormal operating procedure guidance. All control rods fully inserted. The auxiliary feedwater system was manually started due to an approaching autostart setpoint. The unit is stable in Mode 3 at normal operating temperature and pressure.
"Normal containment air release remains in progress."
The steam generators are being fed through the auxiliary feedwater system and will transition to the normal feedwater system. Decay heat removal is to the condenser through the steam dumps. There was no impact on Unit 2. The licensee is investigating the cause of the control rod drop indication.
The licensee notified the NRC Resident Inspector.