What the fuck? How can you not know about the Chernobyl disaster?
People (in Sweden, aswell ) are still getting cancer from the incident, that occurred more than 20 years ago. It wasn't in Russia, t'was in Ukraine (Still the soviet union, but meh). What happened was a reactor suffered a steam explosion, resulting in a nuclear meltdown.
The meltdown produced a radioactive cloud which flew over Russia, Belarus and Ukraine, but also the European part of Turkey, Greece, Moldova, Romania, Lithuania, Finland, Denmark, Norway, Sweden, Austria, Hungary, the Czech Republic and the Slovak Republic, Slovenia, Poland, Switzerland, Germany, Italy, Ireland, France and the United Kingdom
Nuclear power isn't without it's hazards.