Electricite de France SA's (EDF.FR) deal to buy half of U.S. partner Constellation Energy Group Inc.'s (CEG) nuclear assets should be completed before the end of September, Chief Executive Pierre Gadonneix said Wednesday.

EDF should be able to lift all the conditions to which the deal is subject to "definitively" achieve the deal before the end of the third quarter, Gadonneix said at the company's annual general meeting of shareholders.

EDF agreed in December to buy half of Constellation Energy Group Inc.'s (CEG) nuclear power business for $4.5 billion. EDF plans to build new nuclear plants with Constellation in the U.S.

-By Adam Mitchell, Dow Jones Newswires; +33 1 40171756; adam.mitchell@dowjones.com