Dominion Virginia Power has again shut down its troubled Unit 2 at Surry nuclear power plant.
The utility company started the reactor last Thursday. It had been out of service since a tornado struck the plant on April 16.
The reactor was operating at 94 percent capacity on Monday, according to data from the U.S. Nuclear Regulatory Commission.
Dominion spokesman Rick ZuercherÖ said the reactor actually reached 100 percent capacity but engineers spotted a problem in the unit’s cooling ducts Monday afternoon.
They shut down the reactor and notified onsite commission inspectors shortly thereafter. The information wasn’t made public until Tuesday morning on the commission’s website.
Dominion planned to restart Unit 2 last month but the effort slowed after contractors complained about possible asbestos exposure. The incident is under investigation by the state Department of Labor and Industry.
Engineers are still determining how extensive the damage is to the cooling ducts, Zuercher said. He declined to estimate when Dominion may restart the reactor.
Unit 1 has been operating at or near capacity since April 25. Together, the reactors produce 1,598 megawatts of power, enough for 400,000 homes, according to Dominion.Copyright © 2015, Los Angeles Times