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, located on the Susquehanna River in …

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 …

Oct 2, 2025 · 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 …

Oct 11, 2022 · In 1979 a cooling malfunction caused part of the core to melt at Three Mile Island 2. The reactor was destroyed. Some radioactive gas was released a couple of days after the …

Dec 18, 2009 · 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 …

About 100 minutes after the accident started, steam bubbles appeared in the coolant pumps, causing them to vibrate. Fearing a compete failure of these pumps, the operators turned them off.

Mar 27, 2025 · While most people were still asleep just before 4 a.m. on Wednesday, March 28, 1979, a malfunctioning valve set off what would become “ the most serious accident in U.S. …

The accident at Three Mile Island 2 (TMI 2) in 1979 was caused by a combination of equipment failure and the inability of plant operators to understand the reactor’s condition at certain times …

In late March 1979, the Three Mile Island nuclear generating station in Pennsylvania witnessed the worst nuclear incident in American history. In Unit 2 of the plant, a valve surrounding a …

May 3, 2022 · The Three Mile Island accident has been overshadowed by more severe nuclear meltdowns at Chernobyl in 1986 and Fukushima in 2011, but the effects of Three Mile Island …