about radiation, alfa goes a few centimeter in air, beta- and beta+ go about 12 meter true air, gamma goes straight true the planet and out of our solar system
No need to protect against gamma, for the beta is a suit of about 0,75mm lead more then enough and for the alfa is a paper overal already overkill.
If you breath some dust in that gives alfa or beta radiation you have a problem, they do a lot of damage to the body. The beta also creates 2 alfa when it hits an atom
Gamma is more difficult, very high level do almost no damage, medium levels is used in normal x ray and can do some damage, but the benefit is worth it, for every person it kills it saved at least 1000 lives. The low levels are known to normal people as light and the very low ones as radio waves.
So radiation isn't the problem, its the dust, and the fact that it is hard to find an alfa source since it is hard to detect yet kills you easily if you eat or breath it in
