April 12, 2014

 Dresden Unit 2 automatically shut down this morning after experiencing an electrical transient on a power transformer on the non-nuclear side of the plant.  

MORRIS, Ill. - Dresden Unit 2 automatically shut down this morning after experiencing an electrical transient on a power transformer on the non-nuclear side of the plant. The plant responded as expected, safely and without incident. Operators are looking into the cause of the transient.

The Dresden Unit 2 shutdown will not have an impact on electrical service to Exelon customers. Dresden Unit 3 continues to operate at full power.

Dresden Generating Station is approximately 60 miles southwest of Chicago. The station's two nuclear energy units can produce a total of more than 1,800 megawatts at full power - enough carbon free electricity to power more than 1.2 million typical homes. Dresden Unit 1, which began commercial operation in 1960 and was retired in 1978, has been designated a Nuclear Historic Landmark by the American Nuclear Society.

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About Exelon

Exelon Corporation (NYSE: EXC) is the nation's leading competitive energy provider, with 2013 revenues of approximately $24.9 billion. Headquartered in Chicago, Exelon has operations and business activities in 47 states, the District of Columbia and Canada. Exelon is one of the largest competitive U.S. power generators, with more than 35,000 megawatts of owned capacity comprising one of the nation's cleanest and lowest-cost power generation fleets. The company's Constellation business unit provides energy products and services to approximately 100,000 business and public sector customers and approximately 1 million residential customers. Exelon's utilities deliver electricity and natural gas to more than 6.6 million customers in central Maryland (BGE), northern Illinois (ComEd) and southeastern Pennsylvania (PECO).

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Contacts
Bob Osgood Exelon Nuclear Communications
815.416.3743
815.277.6191 (Cell)
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