I remember first hearing about it on the history channel. I believe they said it required the crew to be sheltered in place via foxholes to use it within 200m. Now maybe it should be 130P -1/m if you assume the lethal blast radius of the MOAB is 450 feet. Now buildings would sustain greater damage due to the fact 3-5 psi is not much on the human body, but will collapse some buildings.
Blast effectsThe only issue I have with the initial chart if you don't read the text is it does not clarify lethality is based on being in a building rather than simply the overpressure. The lethality assumes flying debris or being thrown rather than the pressure the human body can withstand.
The question is how quickly the radiation drops off and if you are initially shielded from the nuclear blast how much exposure one gets. This site listed the radiation for a 20 ton explosion
20 ton radiation effectAgain this assumes an exposed soldier rather than a soldier in a foxhole.