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.
Chernobyl Nuclear Power Plant sarcophagus seeping through the reactor's floor into the soil. A new containment device will allow the sarcophagus to be dismantled and radioactive material to be removed. The New Safe Confinement was expected to replace the existing sarcophagus in 2015. However, delays and a €100 million funding gap caused a yearlong delay, before being moved into place in November 2016. Chernobyl Nuclear Power Plant sarcophagus The Chernobyl Nuclear Power Plant sarcophagus or Shelter Object () is a massive steel and concrete structure covering the nuclear reactor number 4 building of the Chernobyl Nuclear Power Plant. It was designed to limit radioactive contamination