LOUISA, Va. (AP) — Dominion Virginia Power is replacing a faulty electronic circuit card that caused a reactor to shut down at its North Anna power station.
Unit 2 at the Louisa County plant tripped automatically shortly before 2 a.m. Wednesday.
Dominion Virginia Power spokesman Rick Zuercher tells The Richmond Times-Dispatch (http://bit.ly/TWyai4 ) that the circuit card failed, causing four valves to close. The valves control the flow of steam in the turbine system.
The unit sensed a problem and shut down automatically.
Zuercher says the reactor is expected to be back on line soon.
The shutdown came less than a week after the reactor was restarted following replacement of coolant pump seals.
Information from: Richmond Times-Dispatch, http://www.timesdispatch.com