Hmm. Once there was a site by a Canadian fellow, he was some kind of a nuke war eggsbert, and his site was about this with hard data (e.g. expected fallout dispersion depending on wind, radiation levels and their effects on a human, radiation absorption in different materials etc.), and info what can be expected what to do what not etc. He published all that in a downloadable book too. I can't seem to find it, probably because many details now missing from my mind.