A description of "the radiation risk" does not imply that there is a radiation risk. At some level, lead is radioactive. So is coal. So is atmospheric carbon

A description of "the radiation risk" does not imply that there is a radiation risk. At some level, lead is radioactive. So is coal. So is atmospheric carbon. However, we don't consider any of these radiation risk. (They're instances of a more general rule, namely that almost everything is radioactive, which means that we can talk about the radiation risk of almost anything.) That's why your reference didn't talk about radiation dangers associated with depleted uranium.