Event Notification Report for August 15, 2009
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
08/14/2009 - 08/15/2009
EVENT NUMBERS
45265
Power Reactor
Event Number: 45265
Facility: LASALLE
Region: 3 State: IL
Unit: [] [2] []
RX Type: [1] GE-5,[2] GE-5
NRC Notified By: MICHAEL FINDLEY
HQ OPS Officer: MARK ABRAMOVITZ
Region: 3 State: IL
Unit: [] [2] []
RX Type: [1] GE-5,[2] GE-5
NRC Notified By: MICHAEL FINDLEY
HQ OPS Officer: MARK ABRAMOVITZ
Notification Date: 08/15/2009
Notification Time: 20:06 [ET]
Event Date: 08/15/2009
Event Time: 16:06 [CDT]
Last Update Date: 08/15/2009
Notification Time: 20:06 [ET]
Event Date: 08/15/2009
Event Time: 16:06 [CDT]
Last Update Date: 08/15/2009
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):
JAMNES CAMERON (R3DO)
JAMNES CAMERON (R3DO)
| 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 DUE TO A TURBINE TRIP
"At 1606 CDT on August 15, 2009, LaSalle Unit 2 automatically scrammed due to a turbine trip. The turbine trip occurred during weekly turbine trip testing. Two safety relief valves actuated [and reseated] in the relief mode on the turbine trip. The reactor water cleanup system isolated during the transient (not being reported as there was no isolation in multiple systems). The plant is stable with reactor pressure control to the main condenser via the main steam isolation valves. The plant is planning to remain in hot shutdown pending [turbine] electro-hydraulic (EHC) system troubleshooting and repair."
All control rods fully inserted during the scram. The site is aligning the ring bus for the normal shutdown electrical lineup. Reactor water level is being maintained using the main feedwater system and decay heat is being removed via the turbine bypass valves.
The licensee notified the NRC Resident Inspector.
"At 1606 CDT on August 15, 2009, LaSalle Unit 2 automatically scrammed due to a turbine trip. The turbine trip occurred during weekly turbine trip testing. Two safety relief valves actuated [and reseated] in the relief mode on the turbine trip. The reactor water cleanup system isolated during the transient (not being reported as there was no isolation in multiple systems). The plant is stable with reactor pressure control to the main condenser via the main steam isolation valves. The plant is planning to remain in hot shutdown pending [turbine] electro-hydraulic (EHC) system troubleshooting and repair."
All control rods fully inserted during the scram. The site is aligning the ring bus for the normal shutdown electrical lineup. Reactor water level is being maintained using the main feedwater system and decay heat is being removed via the turbine bypass valves.
The licensee notified the NRC Resident Inspector.