OR climate change will make a water pond dry, so you cannot even start the reactor.
OR terrorists will capture a reactor and mine it.
OR massive change in water weight due to climate change will create a massive earthquake.
If your mental model of the world sees Russia as a normal functional country instead of a terrorist state capable, willing and engaged in unrestricted warfare against civilians, then of course you'll find yourself in situations where you "don't understand" what's going on.
The operation is disinformation. They know that the world news will report "both sides blame the other" and that's all they need.
Russia has clearly demonstrated over the last year that their soldiers are disposable.