For about 4 hours of exploring I had about 85-90% rad poisoning, I swear I couldn't find a single Rad Away. Oh boy the adventure was interesting. I died a bit more but it was actually pretty fun in a weird way lol...
i just went for solar powered rank 2.. rads are no longer a problem for me as they dissapear every day (unless a bunch of high level ferals show up they cause lots of rads).
the high level charred/bloated ferals cause like 50 rads/sec just from being near you.. even more when they hit you.. its kinda crazy.