LONDONDERRY TWP, PA - Three Mile Island Unit 1 went off line Sunday, September 19 at 11:25 p.m. when the plant's turbine generator shut down. The plant responded as expected. Plant technical experts are working to determine the cause of the turbine generator shut down.
The shutdown resulted in a steam release that may have been audible to nearby residents. Neither the turbine generator shutdown nor the subsequent steam release posed a threat to the health or safety of the public or plant workers.
Three Mile Island Unit 1 generates 852 megawatts of carbon free electricity - enough electricity for about 800,000 homes. Electric customers were not affected by the plant being off line.