Since vitamin C is important for building strong cell walls, and since I would think radiation of any type would tend to make those walls weaker, that would be something I would focus on. However, your question requires (I think) some pretty good advice from a better source.
I wonder about EMF myself - when you hear that birds, whales, bees and other critters may be getting confused due to EMF saturation it makes you wonder.
I did a little looking and found this site. I think what they have to say will be of some help.