Event Notification Report for January 08, 2000
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
01/07/2000 - 01/08/2000
EVENT NUMBERS
36573
Power Reactor
Event Number: 36573
Facility: LIMERICK
Region: 1 State: PA
Unit: [] [2] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: E. V. McEVOY
HQ OPS Officer: LEIGH TROCINE
Region: 1 State: PA
Unit: [] [2] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: E. V. McEVOY
HQ OPS Officer: LEIGH TROCINE
Notification Date: 01/08/2000
Notification Time: 19:58 [ET]
Event Date: 01/08/2000
Event Time: 16:31 [EST]
Last Update Date: 01/08/2000
Notification Time: 19:58 [ET]
Event Date: 01/08/2000
Event Time: 16:31 [EST]
Last Update Date: 01/08/2000
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(ii) - ESF ACTUATION
10 CFR Section:
50.72(b)(2)(ii) - ESF ACTUATION
Person (Organization):
GLENN MEYER (R1)
GLENN MEYER (R1)
| 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 |
TURBINE TRIP FOR UNKNOWN REASONS RESULTING IN AN AUTOMATIC REACTOR SCRAM
The following text is a portion of a facsimile received from the licensee:
"At 1631, Unit 2 received a main turbine trip signal and [an automatic] reactor scram [from 100% power.] All systems operated as designed. The investigation into the turbine trip is ongoing. There was no release of radiation to the environment."
The licensee stated that all rods fully inserted upon receipt of the reactor scram. There was no pressure transient. Reactor vessel level decreased to approximately +10" and recovered to approximately +30". (The reactor scram setpoint is at +12.5", and the emergency core cooling system actuation setpoint is at -38".) There were no engineered safety feature (ESF) actuations (other than the reactor scram), and none were required. The licensee also stated that there were no turbine-related maintenance or surveillance activities ongoing at the time of the event. An AC bus outage was commenced the previous night.
The unit is currently stable in Mode 3 (Hot Shutdown). Normal condensate and feedwater is being supplied to the reactor vessel, and steam is being dumped to the main condenser. There was no adverse effect on containment parameters.
The licensee notified the NRC resident inspector as well as applicable state and local agencies.
******************** UPDATE AT 2338 ON 01/08/00 FROM PHIL CHASE TO LEIGH TROCINE ********************
The licensee updated this event notification to clarify that there was an ESF actuation. The end of cycle recirculation pump trip breakers opened as designed on the turbine trip.
The NRC operations officer notified the R1DO (Meyer).
The following text is a portion of a facsimile received from the licensee:
"At 1631, Unit 2 received a main turbine trip signal and [an automatic] reactor scram [from 100% power.] All systems operated as designed. The investigation into the turbine trip is ongoing. There was no release of radiation to the environment."
The licensee stated that all rods fully inserted upon receipt of the reactor scram. There was no pressure transient. Reactor vessel level decreased to approximately +10" and recovered to approximately +30". (The reactor scram setpoint is at +12.5", and the emergency core cooling system actuation setpoint is at -38".) There were no engineered safety feature (ESF) actuations (other than the reactor scram), and none were required. The licensee also stated that there were no turbine-related maintenance or surveillance activities ongoing at the time of the event. An AC bus outage was commenced the previous night.
The unit is currently stable in Mode 3 (Hot Shutdown). Normal condensate and feedwater is being supplied to the reactor vessel, and steam is being dumped to the main condenser. There was no adverse effect on containment parameters.
The licensee notified the NRC resident inspector as well as applicable state and local agencies.
******************** UPDATE AT 2338 ON 01/08/00 FROM PHIL CHASE TO LEIGH TROCINE ********************
The licensee updated this event notification to clarify that there was an ESF actuation. The end of cycle recirculation pump trip breakers opened as designed on the turbine trip.
The NRC operations officer notified the R1DO (Meyer).