This map illustrates it well: https://i.inews.co.uk/content/uploads/2022/02/SEI_89676355.j...
At this point I think it’s about securing the site so material cannot be used in dirty bombs. If this war were go to nuclear the world has no choice but to get involved.
Or so that it can be, as part of a false flag attack. Alternatively, Russian troops could sabotage it, just to create a (bigger) ecological disaster to punish Ukraine for resisting invasion.
https://en.wikipedia.org/wiki/Russian_apartment_bombings
false flag operations in Eastern Ukraine:
https://www.oryxspioenkop.com/2022/02/false-flag-shenanigans...
On top of that, it wouldn’t be very effective. Most of the radioactive material would be heavy and fall out of the air quickly. Anyone covered in the dust however could shower and probably be totally fine. One the dust is dispersed it’s unlikely to be radioactive enough to form an exclusion zone.
On top of all of that, the whole world now thinks you’re a godless monster, and you might wind up in The Hague. It’s a loser of an idea.
Under "defensible" I mean there are concrete building in the areas, which is the reactor block.