from that link, "There is no possible protection from exposure to very fine particles of depleted uranium through filtering of air."
Same goes for sub-micron isotopes created by a nuclear event. While this is bad news, the short and long-term effects of radiation have been studied (Nagasaki and Hiroshima) and are being studied (Chernobyl). While increased rates of leukemia and thyroid cancers are guaranteed, the actual number of people who survive the initial radiation sickness who actually GET some form of radiation-induced illness is very small, indeed. I don't have actual figures right now, but if 1 in 10,000 people get leukemia in "normal" conditions and a nuclear event causes a 1000% increase, that means that 10 in 10,000 get it. The odds aren't all that bad.
We were created (or have evolved) to withstand radiation. It's all around us, we bathe in it daily. Our bodies are remarkably tough and self-repairing when exposed to chemicals and/or radiation.
Keep your body and clothing clean, clean your food, wash everything you can to flush the major portions of fallout away from you. That's your biggest dose potential. Survive the initial radiation sickness and everything else becomes easy.