June 03, 2010

 Three Mile Island Unit 1 Back On-Line After Maintenance 

 Additional Work Performed to Ensure a Reliable Summer Operating Run 

 

LONDONDERRY TWP. Pa.- Three Mile Island Unit 1 (TMI-1) began producing carbon-free electricity today at 7:18 a.m. ET when operators connected the plant to the regional power grid. TMI-1 generates 852 megawatts of electricity, enough power for more than 800,000 homes.

The unit was taken offline on May 28 at 11 p.m. ET to perform maintenance on a reactor coolant pump. The maintenance work has been completed.

While the plant was offline, plant personnel took advantage of the opportunity to do additional maintenance to ensure a reliable summer operating run.

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About Exelon

Exelon Corporation is one of the nation’s largest electric utilities with approximately $17 billion in annual revenues. The company has one of the industry’s largest portfolios of electricity generation capacity, with a nationwide reach and strong positions in the Midwest and Mid-Atlantic. Exelon distributes electricity to approximately 5.4 million customers in northern Illinois and southeastern Pennsylvania and natural gas to approximately 486,000 customers in the Philadelphia area. Exelon is headquartered in Chicago and trades on the NYSE under the ticker EXC.

Contacts

Ralph DeSantis Exelon Nuclear Communications
717.948.8930
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