I can't be concerned about proximity to a nuclear power plant, even though there is a new one going in 40 miles down the road. It's just a risk I will have to run, hoping that they run it well for the rest of the years I have allotted to be on the planet.
There are two kinds of risk, one that you can't do anything about -- that would be a Three Mile Island or Chernobyl type of accident, where plant operations goofed up -- and you just have to be upwind far
enough that you aren't drawn in some new type of exclusion zone. That's the category I'm in, it would have to be a monumental type release, worse than Fukushima, for me to get caught up. If it did happen, I'd just have to evacuate and start over.
The other kind of risk, one that you have some discretion over, is not to get near any reactors that are poorly sited. Fukushima is the classic example, but in that same category are San Onofre (how much is sea level rise supposed to be this century?), the reactor in Nebraska that was within inches of getting flooded by the Missouri river back a couple years ago, and any others that are in a coastal location.
If you really want a no-nukes
permaculture spot, better look in the Southern Hemisphere. Of the 400 or so nuke plants on the planet, less than a handful are in the Southern Hemisphere.