Event Notification Report for May 29, 1999
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
05/28/1999 - 05/29/1999
EVENT NUMBERS
35778
35778
Power Reactor
Event Number: 35778
Facility: SUSQUEHANNA
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: DAVID WALSH
HQ OPS Officer: BOB STRANSKY
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: DAVID WALSH
HQ OPS Officer: BOB STRANSKY
Notification Date: 05/29/1999
Notification Time: 18:37 [ET]
Event Date: 05/29/1999
Event Time: 17:24 [EDT]
Last Update Date: 05/29/1999
Notification Time: 18:37 [ET]
Event Date: 05/29/1999
Event Time: 17:24 [EDT]
Last Update Date: 05/29/1999
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
RICHARD CONTE (R1)
RICHARD CONTE (R1)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 18 | Power Operation | 0 | Hot Shutdown |
COURTESY CALL DUE TO UNIT SHUTDOWN
"Susquehanna Unit 1 was manually shutdown on 5/29/99 to repair Fast Acting Solenoid Valves on the EHC System. At 1055 on 5/29/99, a controlled shutdown was commenced by reducing recirc flow and then inserting control rods. At 1704 on 5/29/99, the Main Turbine was manually tripped with power at 18%. At 1724, the reactor mode switch was taken to shutdown placing the unit in condition 3. Rx Water level dropped to approximately -0.5 inches as recorded on wide range instrumentation and was restored using Feedwater. There were no ECCS initiations or Diesel Generator starts. There were no challenges to containment as a result of the shutdown. -
"This event does not represent a shutdown required by Technical Specifications. The ESF actuation of the Reactor Protection System and the resulting level 3 isolations are not reportable since it is procedurally recognized as preplanned.
"The unit will be taken to cold shutdown to repair Fast Acting Solenoid Valves on the EHC System. Unit 2 was not affected by this event and is currently in Condition 1 at 100% power."
The NRC resident inspector has been informed of this notification by the licensee.
"Susquehanna Unit 1 was manually shutdown on 5/29/99 to repair Fast Acting Solenoid Valves on the EHC System. At 1055 on 5/29/99, a controlled shutdown was commenced by reducing recirc flow and then inserting control rods. At 1704 on 5/29/99, the Main Turbine was manually tripped with power at 18%. At 1724, the reactor mode switch was taken to shutdown placing the unit in condition 3. Rx Water level dropped to approximately -0.5 inches as recorded on wide range instrumentation and was restored using Feedwater. There were no ECCS initiations or Diesel Generator starts. There were no challenges to containment as a result of the shutdown. -
"This event does not represent a shutdown required by Technical Specifications. The ESF actuation of the Reactor Protection System and the resulting level 3 isolations are not reportable since it is procedurally recognized as preplanned.
"The unit will be taken to cold shutdown to repair Fast Acting Solenoid Valves on the EHC System. Unit 2 was not affected by this event and is currently in Condition 1 at 100% power."
The NRC resident inspector has been informed of this notification by the licensee.