> Except we would hit peak uranium pretty soon We will never hit peak uranium. The "exploitable uranium resources" numbers floating about are for deposits that

> Except we would hit peak uranium pretty soon We will never hit peak uranium. The "exploitable uranium resources" numbers floating about are for deposits that would be commercially exploitable roughly at present prices. The thing is, the cost of the raw uranium is a very small proportion (less than 0.05%) of the cost of running a fission plant. In other words, you could multiply the market price of uranium by 1000 times, and it would only increase the cost of running the plant by 50%. But, well before that, it becomes cost-effective to separate uranium from seawater. Where we have enough for tens of milennia. If that runs out, it then becomes cost-effective to mine and refine nuclear fuel in space and return it to earth. At present-day launch costs. Peak Uranium will never happen. And if it somehow did, thorium is roughly a thousand times more plentiful than U-235.