Ground Zero

[Stokey]

There all nukes to me, what I'm trying to work out is how far away you'd have to be from each type of bomb to have any hope of survival

You can check initial blast areas by nuclear wield just by doing a google search, However it's more the radioactive fallout and it's dispersal and affect on habitat and life that presents the problem after, all these will be affected by the weather and so no clear and concise answers would be possible.