The Three Mile Island accident was a partial nuclear meltdown of the Unit 2 reactor (TMI-2) of the Three Mile Island Nuclear Generating Station. It happened on the Susquehanna River in Londonderry Township, near Harrisburg, Pennsylvania.

2025年1月24日 · The accident at Three Mile Island, though minuscule in its health consequences, had widespread and profound effects on the American nuclear power industry. It resulted in the immediate (though temporary) closing of seven operating reactors like those at Three Mile Island.

2024年3月28日 · The Three Mile Island Unit 2 reactor, near Middletown, Pa., partially melted down on March 28, 1979. This was the most serious accident in U.S. commercial nuclear power plant operating history, although its small radioactive releases had no detectable health effects on plant workers or the public.

2009年12月18日 · In March 1979, a series of mechanical and human errors at the plant caused the worst commercial nuclear accident in U.S. history, resulting in a partial meltdown that released dangerous...

The Three Mile Island Unit 2 reactor, near Middletown, Pa., partially melted down on March 28, 1979. This was the most serious accident in U.S. commercial nuclear power plant operating history, although its small radioactive releases had no detectable health effects on plant workers or …

The most serious accident in U.S. commercial nuclear power plant operating history occurred at the Three Mile Island nuclear station in Pennsylvania. A combination of equipment failure and operator error led to the partial meltdown of the power plant’s Unit 2 reactor that resulted in the release of a small amount of radioactive material.

2009年11月24日 · The worst accident in the history of the U.S. nuclear power industry begins when a pressure valve in the Unit‑2 reactor at Three Mile Island fails to close.