Constellation Energy Nuclear Group Welcomes New Leaders to Nine Mile Point and Calvert Cliffs

  Constellation Energy Nuclear Group Welcomes New Leaders to Nine Mile Point
  and Calvert Cliffs

Business Wire

BALTIMORE -- November 26, 2012

Constellation Energy Nuclear Group (CENG) announces the appointment of
Christopher Costanzo to the position of Site Vice President at Nine Mile Point
Nuclear Station in Oswego, NY. Costanzo has been serving as Plant General
Manager at CENG’s Calvert Cliffs Nuclear Power Plant (CCNPP) since August 2011
and will report to Maria Korsnick, Chief Nuclear Officer, effective November
26, 2012.

“I am pleased to have the ability to tap into the vast experience that Chris
Costanzo brings to the fleet,” explains Korsnick. “Throughout his career he’s
built great teams and run efficient operations and will be a welcomed
complement to the Nine Mile Point leadership.”

Prior to joining CENG, Costanzo worked at Duane Arnold Energy Center (DAEC) in
Iowa as the Site Vice President. He joined DAEC in 2009 from St. Lucie, where
he was Plant General Manager for three years and operations manager for three
years. Costanzo spent 14 years at Exelon where he held several leadership
roles in Operations, Work Management, Training and FIN (Fix it Now). Prior to
that, he served in the U.S. Navy for nine years. He received his Senior
Reactor Operator (SRO) license at Peach Bottom Power Station in the mid-1990s.

In a related move, Mark Flaherty, the actingCorporate Site Operations (CSO)
Plant General Manager, a position located in Baltimore, MD, will join the
Calvert Cliffs Nuclear Power Plant team in Lusby, MD, as the new Plant General
Manager, reporting to George Gellrich, Site Vice President. Prior to his
current assignment, Flaherty was the CSO General Manager – Fleet Engineering.
Flaherty, who has worked in the nuclear industry for more than 25 years,
served as the acting Plant General Manager at Nine Mile Point for
approximately three months in 2011 and was promoted to Manager - Fleet
Engineering in 2009.

Flaherty began his career in the CENG fleet at the R.E. Ginna Nuclear Power
Plant in 1989 as a Licensing Engineer and held numerous positions with
increased responsibility, including Director of Nuclear Safety and
Licensing.In 2004, he became the Manager of Fleet Licensing and helped lead
the Nine Mile Point License Renewal project. In 2006, he became the Manager -
Engineering at CCNPP.

CENG welcomes both gentlemen to their new roles.

About Constellation Energy Nuclear Group (CENG)

CENG (a joint venture between subsidiaries of Exelon Corporation (Exelon -
NYSE: EXC) and Electricité de France, SA (EDF)) is based in Baltimore,
Maryland. Exelon, through its subsidiaries, owns 50.01% of CENG and is the
nation’s leading competitive energy provider, with operations in 47 states,
the District of Columbia and Canada. EDF, through its subsidiaries, owns
49.99% of CENG and is developing strategies in North America in nuclear,
renewables and trading. CENG is a leading producer of safe and reliable
nuclear power. The company owns and operates five nuclear reactors at three
sites in New York and Maryland. CENG’s core values are nuclear and personal
safety. Nuclear energy – America’s largest source of clean-air, carbon-free,
reliable electricity, producing no greenhouse gases – accounts for more than
20 percent of U.S.-produced electricity, powering one in five homes and
businesses across the United States.


Constellation Energy Nuclear Group
Cindy Angus, 410-470-1996
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