Gmat:
I would like to hear some more about this "surrégénérateur" project becuase from what you are explaining, this process "makes" matter? Well, how can it create something from virtually nothing? I guess I am just confused.
Other than that, nukes release three types of radiation when they detonate; Alpha, Beta, and Gamma radiation. The Alpha and Beta radiation is only left over matter of like neutrons and protons. This is the stuff that can be stopped by radiation suits. Gamma radiation is the nasty stuff, where being pure energy, can pass straight through most materials (except 50' of concrete).
NOTE: it has been years since I did all those reports on nuclear fission and Atomic Bombs so I might have something wrong
One last thing that I can say is that we are constantly being bombarded by radiation from space.