Event Notification Report for June 12, 2004
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/11/2004 - 06/12/2004
EVENT NUMBERS
40811
Power Reactor
Event Number: 40811
Facility: SUMMER
Region: 2 State: SC
Unit: [1] [] []
RX Type: [1] W-3-LP
NRC Notified By: AMY MONROE
HQ OPS Officer: MIKE RIPLEY
Region: 2 State: SC
Unit: [1] [] []
RX Type: [1] W-3-LP
NRC Notified By: AMY MONROE
HQ OPS Officer: MIKE RIPLEY
Notification Date: 06/13/2004
Notification Time: 02:23 [ET]
Event Date: 06/12/2004
Event Time: 20:29 [EDT]
Last Update Date: 06/13/2004
Notification Time: 02:23 [ET]
Event Date: 06/12/2004
Event Time: 20:29 [EDT]
Last Update Date: 06/13/2004
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):
MARK LESSER (R2)
MARK LESSER (R2)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
EMERGENCY DIESEL STARTED AND LOADED ON BUS UNDERVOLTAGE SIGNAL
"At 2029 on 6/12/2004, the normal incoming feed (1DA) to the plant opened on an undervoltage signal. At the time of the event a severe thunderstorm was in progress. The 'A' Emergency Diesel Generator started and loads sequenced on as designed. The 'A' Residual Heat Removal pump started but did not inject any water into the Reactor Coolant System. The 'A' Emergency Feedwater Pump started and ran for approximately seven minutes. Other plant equipment also responded as expected.
"The plant transferred back to offsite power at 2252. A follow-up LER will be provide in 60 days."
The licensee notified the NRC Resident Inspector.
"At 2029 on 6/12/2004, the normal incoming feed (1DA) to the plant opened on an undervoltage signal. At the time of the event a severe thunderstorm was in progress. The 'A' Emergency Diesel Generator started and loads sequenced on as designed. The 'A' Residual Heat Removal pump started but did not inject any water into the Reactor Coolant System. The 'A' Emergency Feedwater Pump started and ran for approximately seven minutes. Other plant equipment also responded as expected.
"The plant transferred back to offsite power at 2252. A follow-up LER will be provide in 60 days."
The licensee notified the NRC Resident Inspector.