CEG Constellation Energy Grp. Common Stock

Application to Nuclear Regulatory Commission to Serve as Basis for Future Nuclear Fleet BALTIMORE, April 30 /PRNewswire/ -- UniStar Nuclear, a jointly developed enterprise between Constellation Energy (NYSE:CEG) and AREVA Inc., today notified the Nuclear Regulatory Commission (NRC) that a location adjacent to Constellation Energy's existing Calvert Cliffs Nuclear Power Plant in Lusby, Md., has been selected as the site for UniStar Nuclear's first combined construction and operating license (COL) application. The application, which will feature UniStar Nuclear's chosen technology, the U.S. Evolutionary Power Reactor (EPR), will serve as the reference document for all future UniStar Nuclear COL applications to the NRC. The identification of a specific site is the first step in a multi-step process required before a COL application can be submitted to the NRC. It does not, however, represent a commitment on the part of Constellation Energy to construct a new nuclear plant at the Calvert Cliffs site. "Moving ahead with our reference application is an important step in realizing the UniStar Nuclear vision of a fully standardized fleet of U.S. EPR advanced nuclear power plants," said George Vanderheyden, president of UniStar Nuclear. He added that UniStar Nuclear continues its discussions with potential investors, partners and customers interested in new nuclear across the country. Because UniStar Nuclear is partnering with other business entities for the development of what is expected to be a standardized fleet of new, nuclear power plants across the U.S., each current and future partner will benefit from the reference application. On April 5, UniStar Nuclear announced an agreement with AmerenUE, a Missouri-based utility subsidiary of Ameren Corporation (NYSE:AEE), for the development of a COL application. UniStar Nuclear plans to submit its reference COL application to the NRC no later than March 15, 2008. For an entity to be eligible for production tax credits under the U.S. Energy Policy Act of 2005, its license application must be accepted by the NRC by December 31, 2008. UniStar Nuclear (http://www.unistarnuclear.com/) is a jointly developed enterprise of Constellation Energy and AREVA Inc. that provides a platform upon which to deploy the safest, most secure and most reliable standardized fleet of advanced, nuclear power plants in the United States. It brings together industry-leading design, licensing, construction and operations expertise in a unique business model that is pioneering a new era of emissions-free American power generation. UniStar Nuclear is headquartered in Baltimore, Md. Constellation Energy (http://www.constellation.com/), a FORTUNE 200 company with 2006 revenues of $19.3 billion, is the nation's largest competitive supplier of electricity to large commercial and industrial customers and the nation's largest wholesale power seller. Constellation Energy also manages fuels and energy services on behalf of energy intensive industries and utilities. It owns a diversified fleet of 78 generating units located throughout the United States, totaling approximately 8,700 megawatts of generating capacity. The company delivers electricity and natural gas through the Baltimore Gas and Electric Company (BGE), its regulated utility in Central Maryland. As the leading U.S. nuclear supplier and a key player in the electricity transmission and distribution sector, AREVA's 5000 American employees are committed to serve the nation and pave the way for the future of the electricity market. The company's commitment to America is reflected in its initial investment of $200 million in the U.S. EPR. With 40 locations across the nation and $1.7 billion in revenues in 2006, AREVA combines homegrown leadership, access to worldwide expertise and a proven track record of performance. In the U.S. and in over 100 countries around the world, AREVA is engaged in the 21st century's greatest challenges making energy available to all, protecting the planet and acting responsibly towards future generations. AREVA Inc. is headquartered in Bethesda, Md. Visit us at http://www.us.areva.com/. DATASOURCE: UniStar Nuclear CONTACT: Penny Phelps of AREVA, +1-301-841-1600; or Tracy Imm of Constellation Energy, +1-410-470-7433 Web site: http://www.unistarnuclear.com/ http://www.constellation.com/ http://www.us.areva.com/

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