Category
page 1INES Level 7 accidents

Chernobyl disaster
On 26 April 1986, reactor 4 of the Chernobyl Nuclear Power Plant, located near Pripyat, Ukrainian SSR, Soviet Union, exploded. With dozens of direct casualties and thousands of health complications stemming from the disaster, it is one of only two nuclear accidents rated at the maximum severity on the International Nuclear Event Scale, the other being the 2011 Fukushima nuclear accident. The response involved more than 500,000 personnel and cost an estimated 18 billion rubles. It remains the worst nuclear disaster and the most expensive disaster in history, with an estimated cost of US$700 billion.
Fukushima Daiichi nuclear disaster
2011 nuclear disaster in Japan
discharge of radioactive water of the Fukushima Daiichi Nuclear Power Plant
2023 event in Japan