Event Notification Report for February 22, 2003
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
02/21/2003 - 02/22/2003
EVENT NUMBERS
39611
Power Reactor
Event Number: 39611
Facility: RIVER BEND
Region: 4 State: LA
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: RICKY MAYEUX
HQ OPS Officer: MIKE RIPLEY
Region: 4 State: LA
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: RICKY MAYEUX
HQ OPS Officer: MIKE RIPLEY
Notification Date: 02/22/2003
Notification Time: 05:30 [ET]
Event Date: 02/22/2003
Event Time: 01:23 [CST]
Last Update Date: 02/22/2003
Notification Time: 05:30 [ET]
Event Date: 02/22/2003
Event Time: 01:23 [CST]
Last Update Date: 02/22/2003
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):
KRISS KENNEDY (R4)
KRISS KENNEDY (R4)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | M/R | Y | 91 | Power Operation | 0 | Hot Shutdown |
MANUAL REACTOR TRIP DUE TO MAIN TURBINE ELECTRO-HYDRAULIC OIL LEAK
"At 0123 [CST] a manual scram was inserted with the unit at 91% power in coastdown. Main Electro Hydraulic Control sump level low alarm was received. Cavitation of Main Electro Hydraulic control pumps and report of a leak around the main turbine front standard were received from the field. Manual scram was inserted. A previous condition existed on Feed regulating valve C with the valve not able to close more than 80% open. A level 8 signal was received tripping reactor feed pumps. At 0136 Reactor Core Isolation Cooling was initiated. A reactor level 3 signal was received isolating Suppression Pool Cleanup isolation valves. Reactor feed pump was restarted [and] received a level 8 second time due to leak by of feed regulation valves. A second level 3 was received after the second level 8. Reactor level is being controlled 10 to 51 inches with Reactor core isolation cooling. Outboard main steam isolation valves were closed for pressure control. Pressure control is on main steam line drains."
"Upon further review of plant data, it has been determined a 3rd reactor water level 8 trip was received prior to RCIC stabilizing level."
All control rods fully inserted and the electrical system responded normally. The licensee notified the NRC Resident Inspector.
*****UPDATE ON 2/22/03 at 18:00 FROM WILLIAMSON TO LAURA*****
The RCIC system has been shutdown and the normal feed water system placed back into service to maintain reactor veesel water level.
"At 0123 [CST] a manual scram was inserted with the unit at 91% power in coastdown. Main Electro Hydraulic Control sump level low alarm was received. Cavitation of Main Electro Hydraulic control pumps and report of a leak around the main turbine front standard were received from the field. Manual scram was inserted. A previous condition existed on Feed regulating valve C with the valve not able to close more than 80% open. A level 8 signal was received tripping reactor feed pumps. At 0136 Reactor Core Isolation Cooling was initiated. A reactor level 3 signal was received isolating Suppression Pool Cleanup isolation valves. Reactor feed pump was restarted [and] received a level 8 second time due to leak by of feed regulation valves. A second level 3 was received after the second level 8. Reactor level is being controlled 10 to 51 inches with Reactor core isolation cooling. Outboard main steam isolation valves were closed for pressure control. Pressure control is on main steam line drains."
"Upon further review of plant data, it has been determined a 3rd reactor water level 8 trip was received prior to RCIC stabilizing level."
All control rods fully inserted and the electrical system responded normally. The licensee notified the NRC Resident Inspector.
*****UPDATE ON 2/22/03 at 18:00 FROM WILLIAMSON TO LAURA*****
The RCIC system has been shutdown and the normal feed water system placed back into service to maintain reactor veesel water level.