EDF Chairman Henri Proglio and EDF Energy CEO Vincent de Rivaz

EDF Chairman Henri Proglio and EDF Energy CEO Vincent de Rivaz

Simon Dawson/Bloomberg

Henri Proglio, chairman of Electricite de France SA (EDF), center, and Vincent de Rivaz, chief executive officer of EDF Energy, the U.K. unit of Electricite de France SA, right, listen as Ed Davey, U.K. energy secretary, speaks during a news conference to announce a deal to construct a new nuclear power station, in London.