The Ice Stalker:
I'm saying that it is impossible for radiation to do something like biology in Survarium (realisticely and scientificly).
I don't think that is true. Radiation can cause a huge number of different variations and mutations. Although many of these are liable to cause death or be simply benign, there is nothing saying the mutations can't occur to sex cells and become traits of children. It might be implausible, but it isn't impossible. It is the same process as the random chance factors of evolution, but on a sped-up scale. Instead of time providing variation in genes, we have radiation from nukes or the effects of the Zone.