Fission fuel is so cheap that we currently don't even bother to fully recycle our nuclear waste. We could easily extract a lot of energy from that source that currently goes unexploited.

> We could easily extract a lot of energy from that source that currently goes unexploited.

> easily

That's and understatement. The PUREX process is a nightmare to get right, is expensive in both CAPEX and the specialized personell you need to pay, it produces much more deadly waste products, and you really don't want to proliferate it.

In the end, virgin uranium directly from ore is orders of magnitude cheaper for the foreseeable future.