[crz]

“Prevailing winds run west to east.”

Generally that is true. Now explain after Chernobyl went up the radiation that showed up at the UK’s nuclear submarine base, Gare Loch, in Scotland.

They said the radiation detectors went nuts for days after it arrived there.

[LVS1]

The winds cycle east to west then pushed up to the poles while air from the poles is pulled downwards. There are many images on the internet that show how the air moves.

You are correct that the radiation was detected after the reactor went up.

The key point remains the same, Russia would get hit with the fallout first, then it will move upwards towards Northern Europe and from there to the North Pole and then down to the rest of the planet.

Nobody wins.