I am confused about small reactors : r/NuclearPower

I hope someone here can explain this to me. So we have been able to power submarines with small, safe, reliable nuclear reactors since the USS Nautilus in 1954. The US Navy operates dozens and dozens of nuclear powered submarines and aircraft carriers safely and reliably. Why don't we have commercial small, scalable nuclear reactors? It seems like all government and public attempts end up running into the 10s of billions in cost and decades in development? Don't we already have small, safe and reliable nuclear reactors in every day use in the military? I would really love to understand this apparent scism. The military isn't concerned with turning a profit. That's true, but they are also not paying 13 billion dollars a piece just on the reactors. No, but naval reactors generate small amounts of power which wouldn't sell for much. Plus the fuel is extremely expensive at like 90% enrichment, so you'd want to lower that and refuel it in situ, and redesigning it to do that is where your co

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