Chernobyl accelerated a big anti nuclear movement in Germany. It was the biggest and most well organized protest movement for decades. They managed to shut down construction of some power plants pretty quickly. Some with finished construction never started operating. Exiting nuclear was a main issue for the Green Party from early on. When they got into a government coalition with the SPD in 1998, a phaseout of nuclear power was planned and implemented. When the CDU got back into government, they reversed the exit from nuclear power, even though this was unpopular. The Fukushima nuclear disaster affected Merkel‘s popularity so much, they decided to exit nuclear power again. All of this cost a lot of money, huge amounts of CO2 emissions, and Germany lost technology.

The anti nuclear movement is the most successful political movement of the German left. It’s also an utter tragedy.

Putin Propaganda

While the German left and especially the peace movement and anti nuclear movement received some Soviet support, Putin‘s Russia didn’t play a role AFAIK. For the Soviets a militarily weak and non nuclear West Germany was in their interest.