when I say "secured", facilities in the UK have a small army guarding them. along with a direct line to the army.I suppose you could die from radioactive waste if you A) broke into the secured facility where it's being processed and swallowed some.
or B) blast mined through concrete in the places where it's been buried, then cut your way through containment vessels using acetylene cutting gear then eat some
(I don't know about facilities elsewhere but I bet it's similar levels of security). It's probably easier to break into a military base.