I have no idea what you're getting at here. If you mean we should use a Thorium reactor to generate Plutonium then others have explained why that's impossible.

I have no idea what you're getting at here. If you mean we should use a Thorium reactor to generate Plutonium then others have explained why that's impossible. If you mean that we should use a Thorium reactor instead of a Plutonium RTG then that also wouldn't work, the smallest reactor is still way heavier than an RTG.