The Chernobyl disaster occurred when technicians at the power station, near Pripyat in the north of Ukraine, then part of the Soviet Union, ran a test on reactor number four to simulate shutting it ...

Add Yahoo as a preferred source to see more of our stories on Google. Control panel for Reactor 4 of the dilapidated Chernobyl Nuclear Power Plant - Tkachuk/Getty Images As we reach the 40-year ...

All of the Chernobyl reactors were shut down in 2000. Reactor No. 4 was sealed under a sarcophagus and is surrounded by a nearly 20-mile exclusion zone. The damaged reactor will stay radioactive for ...

The world's worst nuclear disaster began 40 years ago at 1:23 a.m. on April 26, 1986, when Unit 4 at the Chernobyl nuclear power generation facility experienced an explosion and meltdown. Ironically, ...