Question: what am I missing when it comes to FBR closed loop?
The FBR is supposed to sustain itself, correct? Like, once I have the loop going I don't have to add more fuel? Here's my math:
dep. core fuel->core fuel in the reprocessor returns 75% of the core fuel plus some fission waste product.
enr. blanket fuel->core fuel + blanket fuel returns the other 25% of the core fuel + 75% of the blanket fuel.
So we end up needing to top up 25% of the blanket fuel. Am I just stupid to think it was supposed to be completely self-sustaining without adding anything to it?
The more I think about this I'm realizing of course I have to add something, because otherwise it's free energy.
Edit: Yep, I'm just stupid and of course you have to keep adding stuff!