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Nuclear Reactor Trips Offline Before Planned Outage

Comanche Peak Nuclear Reactor Trips Offline Before Planned Outage

A nuclear reactor tripped offline as it was shutting down in preparation for a refueling outage.
Unit 2 at the 2,300-MW Comanche Peak nuclear power plant in Texas was in the process of shutting down for a planned refueling outage when the steam generator 3 feed control valve failed to control in automatic or manual, which resulted in excessive feedwater flow. Plant operators with Luminant manually tripped the reactor offline and aligned auxiliary feedwater.
All of the control rods inserted as designed, and the plant is supplying water to the steam generators with auxiliary feedwater and removing decay through the main condenser. Unit 1 continued full operations.
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