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NRC Receives Event Notification Involving Comanche Peak Nuclear Power Plant

Source: 
Targeted News Service

WASHINGTON, March 4 -- The Nuclear Regulatory Commission issued the following event notification (No. 53906) involving Comanche Peak Nuclear Power Plant in Texas:

REACTOR TRIP DUE TO FEEDWATER ISOLATION VALVE CLOSURE

"At 0317 CST, the Unit 2 Reactor tripped due to Feedwater Isolation Valve (FWIV) 2-04 going closed. All 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-007B. The Emergency Response Guideline Procedure Network has been exited. Decay heat is being rejected to the Main Condenser via the Steam Dump Valves.

"The cause of the FWIV going closed is currently under investigation."

All control rods fully inserted and the reactor trip was uncomplicated. Unit 2 is in a normal post-trip electrical line-up. There was no impact on Unit 1 due to the Unit 2 reactor trip.

The licensee notified the NRC Resident Inspector.

Power Reactor

Event Number: 53906

Facility: COMANCHE PEAK

Region: 4

State: TX

Unit: [] [2] []

RX Type: [1] W-4-LP,[2] W-4-LP

NRC Notified By: CHRISTOPHER METZ

HQ OPS Officer: DONALD NORWOOD

Notification Date: 03/02/2019

Notification Time: 06:12 [ET]

Event Date: 03/02/2019

Event Time: 03:17 [CST]

Last Update Date: 03/02/2019

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): RICK DEESE (R4DO).

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