Chernoybyl

The Chernobyl disaster began on 26 April 1
986 with the explosion of the No.4 reactor
Of the Chernobyl Nuclear Power Plant near
The city of Pripyat in the North of the Ukraini
An SSR, close to the border with the Byelor
Russian SSR in the Soviet Union.{1} It is one of only two nuclear energy accidents rated at seven-the maximum severity-on the International Nuclear Event Scale, the other being the 2011 Fukushima nuclear accident. The initial emergency response and subsequent mitigation efforts involved more than 5 00,000 personnel and cost an estimated 18 billion roubles-roughly US$68 billion in 2019, adjusted for inflation. It was the worst nuclear disaster in history, and the costliest disaster in human history, costing an estimated US$700 billion

The accident occurred during a test of the steam turbine's ability to power the emergency feedwater pumps in the event of a