[jackdeansmith]

Those are RTGs that harvest a couple hundred watts of decay heat for really remote applications. Often used in space probes, etc... Bit of a different safety profile since they're low power and generally don't have any moving parts.

[lightgreen]

> since they're low power and generally don't have any moving parts

Rather since they don't have a critical mass/configuration which makes them impossible to explode.

[jackdeansmith]

Right, yeah that's more important, there's no way to get a runaway chain reaction with an RTG