We need to be prepared for anything including nuclear radiation, plutonium and other poisons entering our environment wherever we are. Radiation effects include cancer, genetic and DNA damage, reproductive damage, hormonal damage, and thyroid damage (that’s why they want you to take potassium iodine, another dangerous toxin) but I wouldn’t. There is a much safer substance (nascent iodine) as well as Zeolite.
There are some natural substances strong enough to protect against radiation. A good article on what you can do is here:
And to make sure the water you drink is safe, look at the following article:
Where Radiation Effects the Body and Dosage Levels