Didn’t the plants all get safely shut down before the Russians got there? If so, they can’t cause a meltdown unless they actually try to start the reactors.

Are the shutdown? Yes. Safely? Definitely not. The type of reactor they are and the fuel they use, requires active cooling as it remains hot for years.

Zaporizhzhia is the plant in question, and it’s water supply is in jeopardy after the destruction of the Kakhovka dam.

With the plant not in active operation, it’s unlikely we’d see an incident on the level of Chernobyl but it’s far from safe.