With the talk of possible disasters involving the ZNPP, four really important things really need to be kept in mind.
Firstly, much of the media seem to be treating this power station as no different than Chernobyl, just another crappy Soviet design, but in reality it's a completely different design, sharing about as much with an RBMK power station as a Tesla does with a '69 Mustang. It is technologically superior than any plant in the UK or USA, although this is mostly due to both countries having abandoned nuclear power before the USSR (although the UK did continue an under construction plant into the 90s).
Secondly, while Chernobyl was based on a flawed design from the 50's which had seen shockingly little improvement (as beating Britain and America to building a nuclear power station was a massive symbol of pride for the Soviets and so they were extremely opposed to adding any improvements based off of western designs). That disaster was primarily caused by ridiculous levels of operator incompetence and negligence (this is often missed by people who only "learned" of the events via HBO's dramatization series, which played very fast and loose with the facts). A disaster like that is impossible at the ZNPP because the safety systems and plant design simply will not let any operator run the plant in such a suicidal state, they simply do not have the overrides to do it post Chernobyl.
Thirdly, when you factor in both of the above, the only way a serious disaster could take place at the plant is by deliberate action, there will be no plausible deniability (not that Russia have cared to much about the plausibility of their denials thus far).
Fourthly, none of this conversation would be taking place had Putin not invaded Ukraine, so even if a HIMARS rocket malfunctions, flies to the plant, opens the doors, get in a lift and proceeds to fill the entire control room with Monster Munch it would still be 100% Russia's fault.