Three Mile Island's undamaged Unit 1 reactor automatically shut down Thursday in a test that caps a three-month process of restarting the power plant for the first time since the nation's worst nuclear accident nearly seven years ago.
Plant operators turned off the unit's turbine generator around noon, causing the reactor to automatically shut down, said Gordon Tomb, a spokesman for GPU Nuclear Corp., TMI's operator. He said the test appeared to be successful.
Unit 1 was restarted Oct. 3 for the first time since the March, 1979, accident that crippled the adjacent Unit 2. That unit remains closed.