AmerGen said that it has conducted a study to ensure there will be no increased environmental impacts from the extended operating life of the plant. The facility’s current license expires in April 2014.

The Three Mile Island facility is subject to an ongoing, rigorous program of oversight and inspection by the Nuclear Regulatory Commission (NRC) which is expected to take 22 to 30 months to review the application before making a decision.

The company expects to invest $300 million during the fall 2009 refueling outage to replace both of the plant’s steam generators and make other equipment enhancements.

Russell West, Three Mile Island’s site vice president, said: This is an important milestone for the employees of Three Mile Island and the residents of central Pennsylvania. AmerGen’s commitment to continue the operation of Three Mile Island means 20 more years of clean, safe and reliable energy for our region.