[JackFaker]

This isn't a fair or useful comparison. The USSR was a command and control political and economic system which creates a kind of capture in decision making that is meaningfully different from what we encounter in the U.S. To put it simply, they got Chernobyl and the U.S. got three mile island which is a very different kind of nuclear (and governmental) failure.

[WalterBright]

3 Mile Island wasn't remotely the disaster that Chernobyl was. There's no comparison.

Chernobyl is hardly the only environmental disaster in the USSR.