United States Nuclear Regulatory Commission - Protecting People and the Environment
Home > NRC Library > Document Collections > Reports Associated with Events > Event Notification Reports > 2020 > January 02

Event Notification Report for January 02, 2020

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
1/1/2020 - 1/2/2020

** EVENT NUMBERS **


54460

To top of page
Power Reactor Event Number: 54460
Facility: COMANCHE PEAK
Region: 4     State: TX
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: CHRIS METZ
HQ OPS Officer: BRIAN LIN
Notification Date: 01/01/2020
Notification Time: 16:57 [ET]
Event Date: 01/01/2020
Event Time: 12:53 [CST]
Last Update Date: 01/01/2020
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
GREG WARNICK (R4DO)
Unit SCRAM Code RX Crit Initial PWR Initial RX Mode Current PWR Current RX Mode
2 M/R Y 100 Power Operation 0 Hot Standby

Event Text

MANUAL REACTOR TRIP AND SPECIFIED SYSTEM ACTUATION

"At 1253 [CST] Unit 2 Reactor was manually tripped due to a trip of both Main Feed Pumps. During an evolution to secure Circulating Water Pump 2-01, vacuum was reduced in the auxiliary condensers for both Main Feed Pumps causing both Main Feed Pumps to trip. Both Motor Driven and the Turbine Driven Auxiliary Feedwater Pumps started due to steam generator Lo-Lo levels.

"Unit 2 is being maintained in Hot Standby (Mode 3) in accordance with Integrated Plant Operating Procedure IPO-0078. The Emergency Response Guideline Network has been exited. Decay heat is being rejected to the Main Condenser via the Steam Dump Valves."

The licensee notified the NRC Resident Inspector.


Page Last Reviewed/Updated Thursday, January 02, 2020
Thursday, January 02, 2020