I’m going to guess that the element of nuclear radiation and its effects on the area and anyone in it are going to be completely ignored OR we get a sentence about the barrier magically blocking its spread...
The horrors of a nuclear bomb are not from the explosion, but the radiation fallout and long term damage its does to the population and area. A person might be far away from the explosion, but still get blasted with enough radiation for cancer to kill them in a few years tops