Earlier quoted context omitted.
> spreading radiation everywhere they go. Radiation is not "spread" in the manner you are suggesting. The only affect on passers-by would be transient exposure - less than ideal, but not a fatal risk. If the capsule were breached and radioactive material were spread, then that would be a disaster posing actual risk to the public at large.
> Radiation is not "spread" in the manner you are suggesting "[in] 1987 in Goiânia, Brazil [..] a forgotten radiotherapy source was stolen from an abandoned hospital site in the city. It was subsequently handled by many people, resulting in four deaths. About 112,000 people were examined for radioactive contamination and 249 of them were found to have been contaminated" "In the consequent cleanup operation, topsoil h…
That’s just the original source of beta particles being spread around rather than the beta radiation “spreading” in some way.