Russia has been making moves on nuclear power plants by occupying (Chernobyl), shelling (Zaporizhzhia and test reactor at Kharkiv) and advancing toward other NPP's.
There is worrying thought that the Russians are creating a pretext for a nuclear disaster, ultimate area denial by exploding a NPP and blaming the Ukrainians for it. This was unthinkable two weeks ago, now it is in the realm of possibility.
i hope I am wrong.