Isn’t the exclusion zone a 25 mile diameter?
I don’t remember the exact number, but something like that. It’s called the “exclusion zone” for a reason. If you go in, you’re supposed to stay for a limited time, go with a trained escort, take a geiger counter, not disturb anything, not eat anything from there, etc. An army going in and kicking up dust with heavy vehicles, digging foxholes, etc., breaks all of the rules.