The first US nuclear reactor built from scratch in decades enters commercial operation in Georgia

ATLANTA — The first American nuclear reactor to be built from scratch in decades is sending electricity reliably to the grid, but the cost of the Georgia power plant could discourage utilities from pursuing nuclear power as a path to a carbon-free future.

Georgia Power Co. announced Monday that Unit 3 at Plant Vogtle, southeast of Augusta, has completed testing and is now in commercial operation, seven years late and $17 billion over budget.

At its full output of 1,100 megawatts of electricity, Unit 3 can power 500,000 homes and businesses. A number of other utilities in Georgia, Florida and Alabama are receiving the electricity, in addition to the 2.7 million customers of Southern Co. subsidiary Georgia Power.

“This hadn’t been done in this country from start to finish in some 30-plus years,” Chris Womack, CEO of Atlanta-based Southern Co. said Monday in a telephone interview. “So to do this, to get this done, to get this done right, is a wonderful accomplishment for our company, for the state and for the customers here in Georgia.”

A fourth reactor is also nearing completion at the site, where two earlier reactors have been generating electricity for decades. The Nuclear Regulatory Commission on Friday said radioactive fuel could be loaded into Unit 4, a step expected to take place before the end of September. Unit 4 is scheduled to enter commercial operation by March.

The third and fourth reactors were originally supposed to cost $14 billion, but are now on track to cost their owners $31 billion. That doesn’t include $3.7 billion that original contractor Westinghouse paid to the owners to walk away from the project. That brings total spending to almost $35 billion.

The third reactor was supposed to start generating power in 2016 when construction began in 2009.