Chernobyl did deposit radioactive material over Germany. Fukushima also happened, btw., and that led to an acceleration of the exit then.
The chances of a Soviet leadership-induced meltdown like at a German nuclear reactor that is properly designed and maintained is laughable.
It is, however, extremely hard to film the slow killing of people by browncoal. It's easy to film a nuclear reactor incident.
A slightly racist belief in the Japanese as superior at following the rules meant a big shock when the Germans realised that even the Japanese could not be trusted with nuclear power.