Maryland Public Service Commission's Ruling Related to the Proposed Nuclear Joint Venture Between Constellation Energy and EDF Group

BALTIMORE & PARIS, Oct 30, 2009 (BUSINESS WIRE) -- Constellation Energy (NYSE:CEG) and EDF Development Inc. (a wholly-owned subsidiary of EDF S.A.) issued the following statement regarding the order issued today by the Maryland Public Service Commission (PSC) in connection with the proposed nuclear joint venture between Constellation Energy and EDF.

"Constellation Energy and EDF confirm that the companies are in receipt of today's order issued by the Maryland Public Service Commission. Both companies have begun the process of reviewing the order." About Constellation Energy Constellation Energy (www.constellation.com) is a leading supplier of energy products and services to wholesale and retail electric and natural gas customers. It owns a diversified fleet of generating units located throughout the United States, totaling approximately 9,100 megawatts of generating capacity, and is among the leaders pursuing the development of new nuclear plants in the United States. The company delivers electricity and natural gas through the Baltimore Gas and Electric Company (BGE), its regulated utility in Central Maryland. A FORTUNE 500 company headquartered in Baltimore, Constellation Energy had revenues of $19.8 billion in 2008.

About EDF Group The EDF Group, one of the leaders in the energy market in Europe, is an integrated energy company active in all businesses: generation, transmission, distribution, energy supply and trading. The Group is the leading electricity producer in Europe. In France, it has mainly nuclear and hydraulic production facilities where 95% of the electricity output involves no CO2 emissions. EDF's transport and distribution subsidiaries in France operate 1,274,000 km of low and medium voltage overhead and underground electricity lines and around 100,000 km of high and very high voltage networks. The Group is involved in supplying energy and services to more than 38 million customers around the world, including more than 28 million in France. The Group generated consolidated sales of EUR 64.3 billion in 2008, of which 47% in Europe excluding France. EDF is listed on the Paris Stock Exchange and is a member of the CAC 40 index.

Forward-Looking Statements This press release contains forward-looking statements within the meaning of the Securities Exchange Act of 1934, including, but not limited to, statements relating to the prospects for the proposed transaction between Constellation Energy and EDF. Such statements are based upon the current beliefs and expectations of our management and involve a number of significant risks and uncertainties, many of which are difficult to predict and are generally beyond the control of Constellation Energy and EDF. Actual results may differ materially from the results anticipated in these forward-looking statements. A discussion of the risks and uncertainties that could cause Constellation Energy's results to differ materially from those described in the forward-looking statements can be found in Constellation Energy's periodic reports filed with the Securities and Exchange Commission, which are available at the Securities and Exchange Commission's Web site (http://www.sec.gov) at no charge. Constellation Energy assumes no responsibility to update any forward-looking statements as a result of new information or future developments except as expressly required by law.

SOURCE: Constellation Energy / EDF Development Inc.

CONTACT: Press: EDF in Paris Carole Trivi + 33 (1) 40 42 44 19 / + 33 (1) 40 42 46 37 or EDF in the US: Barrett Golden / Kelly Sullivan / Eric Brielmann at Joele Frank, Wilkinson Brimmer Katcher : [phone] or Constellation Energy: Robert L. Gould / Debra Larsson : + 1 410 470 7433 or Analysts and Investors: EDF David Newhouse: + 33 (1) 40 42 32 45 Alexis Chatillon: + 33 (1) 40 42 72 46 or Constellation Energy: Carim Khouzami : [phone] Copyright Business Wire 2009 -0- KEYWORD: United States

France

Europe

North America

Maryland INDUSTRY KEYWORD: Energy

Utilities

Nuclear SUBJECT CODE: Contract/Agreement