My characters are entering a warehouse wearing radiation suits to protect from radiated materials. Can they communicate with each other via radio? No aliens. Humans in a real scenario on earth dealing with radioactive materials. IF it's possible what RF? Shortwave? Long wave? FM? AM would be noisy around nuclear materials. Any suggestions?
Radiation will have little if any affect on radio waves. Depending on the type and intensity of the radiation it might affect the radio's hardware. However any radiation that would significantly damage the radio hardware would probably also be damaging the humans using it.
Alpha and Beta particles are easily shielded and would pose little if any threat. Gamma waves are nearly impossible to shield and depending on the intensity would damage the radio hardware and harm the human. The human would probably fail first succumbing to radiation sickness.