NEW YORK, June 27 (Reuters) - The U.S. will need upwards

of 10 gigawatts of additional large nuclear capacity in the

coming years, power provider Southern Company ( SO ) CEO Chris

Womack said at a Reuters conference on Thursday.

Government incentives, including providing cost-overrun

insurance, would be needed to grow the country's nuclear

industry, Womack said. Other industries would also need to

invest to expand nuclear, particularly new technologies like

small modular reactors, he added.

(Reporting by Laila Kearney in New York)