Londonderry Township, PA - Three Mile Island Unit 1 (TMI-1) began producing carbon-free electricity today at 7:30 p.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 March 4 at 3:02 a.m. ET to perform maintenance on two reactor coolant pumps and on an Isolation Phase Bus Bar in the Turbine Building. The maintenance work involved repairing small oil leaks on both pumps and electrical work on the bus bar. The work has been completed.
"We took advantage of being offline to do all the work necessary to ensure the plant is set up for a safe and reliable operating cycle," said Bill Noll, TMI site vice president.