Viewing a single comment thread. View all comments

BillWoods6 t1_j98l2k4 wrote

> Basically a radioactive element that has been arranged to encourage it to just react a little bit faster.

They don't; there's no way to do that. RTGs just use isotopes that decay pretty quickly. Notably plutonium-238, which has a half-life of only 88 years.


fiendishrabbit t1_j994x7e wrote

Subcritical RTGs is a thing. Notably for the designs intended to last more than a few decades.