1986
The incident at a nuclear power plant in Chernobyl, Russia.
The incident occurred near Chernobyl in the Ukraine At that time the Ukraine was part of the Soviet Union.
1986
1986
1986
Perhaps the Chernobyl incident in the Ukraine caused Ukrainians to move to Russia therefore contaminating Russians
Chernobyl started from an inherently unstable design, it's considered a breeder reactor, really good at making weapons grade plutonium but functionally unstable. The actual incident occurred during testing of the reactor to see how far it could be pushed.
At Chernobyl there was a steam explosion which blew off the top of the reactor followed by a fire due to the graphite moderator burning in air, and a huge amount of radioactive material was discharged, including fission products from the fuel. I'm not sure which fast reactor you are referring to, but certainly the incident did not involve massive catastrophic failure of the reactor vessel, or it would have become a world incident as Chernobyl did.
There was a nuclear accident in Chernobyl in 1986. At the time, it was part of the Soviet Union. Now it is part of the Ukraine.
The Chernobyl nuclear incident, the BP oil spill (one of many spills), and the dust bowl.
USA