Here is a neat little Freeware tool I found...it is "Effects of Nuclear Weapons" calculator. Have some fun calculating the effect of Radiation, Thermal Heat & Pressure Damage of varying size Nuclear bombs exploded at different heights & distances from blast. It also has a template of past explosions to compare the effects of such bombs in history.
http://handheld.softpedia.com/get/Ed...ns-36992.shtml
Enjoy!