UniStar selects Alstom to supply Arabelle turbines for new
U.S. nuclear plants

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This agreement with Alstom gives us certainty in the
global supply chain that Unistar Nuclear Energy will have vital
turbine components for our first four U.S. EPRs, said
George Vanderheyden, president and chief executive officer of
UniStar Nuclear Energy. "We selected Alstom because it is the
world's leading provider of nuclear steam turbine generators.
With its Arabelle technology, Alstom offers the most advanced
and efficient technology.

Vanderheyden further emphasized that a final
decision to build the first U.S. EPR has yet to be made but noted
the agreement with Alstom positions UNE to begin ordering steam
turbine generators next year.

The agreement with Alstom follows
Constellation Energy's announcement in July that it had formed a
strategic joint venture with EDF, the world's largest operator of
nuclear plants, to create UNE to develop and deploy a fleet of
new nuclear power plants in the United States. UNE is itself an
expansion of the partnership between Constellation Energy and
AREVA announced in September 2005. The joint venture's prime
reactor technology, which is already under construction in
Europe, is AREVA's U.S. Evolutionary Power Reactor (EPR).

Philippe Joubert, Alstom Executive Vice
President and President of Alstom Power Systems, said the
agreement solidifies UniStar Nuclear Energys position as a
leader in the U.S. nuclear renaissance. He said Alstom will
allocate the resources that will enable it to support UniStar
Nuclear Energys December 2015 target for completing its
first nuclear power plant.

"We are pleased to have been selected as Unistar's supplier
of choice for essential turbine technology," said Mr. Joubert.
"As the world's largest supplier of nuclear turbine systems, we
bring both experience and a history of innovation that make us
the right partner at the right time for UniStar."

Alstom, with operations in 70 countries,
brings international expertise and extensive knowledge of local
markets as a fully integrated provider of clean, efficient and
technologically advanced power generation solutions in all key
energy markets (including coal, natural gas, nuclear and hydro
and wind.). The worlds No. 1 supplier of nuclear turbine
systems, Alstom has installed more than 178 units worldwide,
meaning that more than 30 percent of the entire worldwide nuclear
installed base uses Alstom equipment.


UniStar Nuclear Energy, a strategic joint
venture between Constellation Energy and EDF, is powering the
nuclear renaissance in North America through industry leadership,
disciplined business practices and effective risk-management.
Based in Baltimore, UniStar Nuclear Energy provides the
licensing, construction and operating services needed to support
the expansion of clean, safe and sustainable nuclear energy in
the United States. UNE is an expansion of the pioneering
partnership established between Constellation Energy and Areva to
develop and deploy a fleet of standardized nuclear power plants
based on the Areva EPR technology.

Constellation Energy, a FORTUNE 125 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

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