Spacecraft that use RTGs have to do quite a bit to ensure that the risk of the radioactive contamination is low. It is pretty expensive both technologically and

Spacecraft that use RTGs have to do quite a bit to ensure that the risk of the radioactive contamination is low. It is pretty expensive both technologically and to go through all the regulatory hurdles. So I think getting to a place where this is feasible is still a very long way off. https://en.wikipedia.org/wiki/Radioisotope_thermoelectric_generator#Radioactive_contamination https://en.wikipedia.org/wiki/Radioisotope_thermoelectric_ge...