The two worst nuclear accidents in history were the Fukushima Daiichi Nuclear Power Plant in Fukushima, Japan, in 2011 and Chernobyl in Pripyat, Ukraine, in 1986. Both were Level-7 incidents.

The Chernobyl Nuclear Power Plant continued operations until December 2000, nearly 14 years after the April 26, 1986, meltdown of one of its reactors that caused the worst nuclear accident on ...

The Zaporizhzhia Nuclear Power Plant has been cut off from the electricity grid since September 5. Nuclear plants require power to keep their reactors cool. ED JONES/AFP via Getty Images hide caption ...

While comparisons to Chernobyl nuclear disaster, which occurred about 300 miles away from the Zaporizhzhia Nuclear Power Plant, were understandable, the incidents are not easy to equate, according ...

On Mar. 28, 1979, the most significant nuclear power accident in U.S. history began after a pressure valve failed to close at the Three Mile Island nuclear plant near Harrisburg, Pa. What followed … ...

Receding water levels are seen this month along the Dnipro River in Ukraine’s southeast, with the Zaporizhzhia Nuclear Power Plant, which is occupied by Russian forces, in the background.

China's United Nations representative has issued a warning about the risk of a nuclear accident at the Zaporizhzhia power plant in Ukraine.. Zaporizhzhia, the largest nuclear power plant in Europe ...

Three Mile Island, the shuttered Pennsylvania nuclear power plant that was the site of a 1979 reactor accident that remains the worst commercial nuclear power plant accident in U.S. history, is ...

More than 70 agencies participating in training drill simulating nuclear power plant accident. By Paula Wethington. Paula Wethington. Web Producer. Paula Wethington is a digital producer at CBS ...

The one nuclear disaster that looms above all is of course that of Chernobyl, or rather the Chernobyl Nuclear Power Plant (ChNPP, today the Chornobyl NPP) with its accompanying city of Pripyat.