Chernobyl murdered during the Nazi occupation of 1941–44. Twenty years later, the area was chosen as the site of the first nuclear power station to be built on Ukrainian soil. The Duga over-the-horizon radar array, several miles outside of Chernobyl, was the origin of the Russian Woodpecker; it was designed as part of an anti-ballistic missile early warning radar network. With the dissolution of the Soviet Union in 1991, Chernobyl remained part of Ukraine. On 26 April 1986, Reactor No. 4 at the Chernobyl Nuclear Power Plant exploded after tests were done on the reactor improperly and the operators lost control.
Balakovo Nuclear Power Plant which ameliorates radiation damage and extends service life by between 15 and 30 years. This had been demonstrated on unit 1. On 27 June 1985 during startup of the first reactor unit, a human error (later attributed to inexperience and haste) unexpectedly opened a pressurizer relief valve, and 300 °C steam entered the staff work area. Fourteen people were killed. This event is cited as one of the predecessors of the Chernobyl disaster. Balakovo Nuclear Power Plant Balakovo nuclear power station ( []) is located in the city of Balakovo, Saratov Oblast, Russia, about 900 kilometers south-east of Moscow. It