PRAGUE—Three energy companies including U.S. Westinghouse, France’s EdF, and Korea’s KHNP will by vying to build the Czech Republic’s newest reactor at the Dukovany nuclear power station, authorities said Wednesday, as the country strives to become more energy independent and wean itself of fossil fuels. State-controlled power company CEZ says final bids for the contract…

VIENNA/SEOUL—North Korea appears to have restarted a nuclear reactor that is widely believed to have produced plutonium for nuclear weapons, the U.N. atomic watchdog said in an annual report, highlighting the isolated nation’s efforts to expand its arsenal. The signs of operation at the five-megawatt (MW) reactor, which is seen as capable of producing weapons-grade…

TOKYO—A more than 40-year-old nuclear reactor in central Japan which suffered a deadly accident has resumed operation after being taken offline for a decade after the March 2011 Fukushima nuclear disaster, as Japan pushes to meet its carbon emissions reduction goal. Kansai Electric Power Co. said the Mihama No. 3 reactor in Fukui prefecture went…