You won't be able to get any meaningful figures from the atomic blasts, working like that.
For instance, the curies released would depend on the time of the blast (as it increases with time), the type of warhead and the size of the warhead.
In addition, almost all of the radiation will not be absorbed by man; the atomic tests were done well out of the way of most society, which means that if you just did -> curies/(curie danger level (although strictly speaking there is no safe level)), you'd get a figure which was inflated by thousands if not millions.