Not an engineer, but I don't think the sodium/water heat exchangers are a fatal setback -- for one thing, there's an intermediate sodium loop between the core s

Not an engineer, but I don't think the sodium/water heat exchangers are a fatal setback -- for one thing, there's an intermediate sodium loop between the core sodium coolant and the turbine loop, so any sodium/water interaction* isn't near the reactor core. I'm pretty sure all SFRs to date have had steam turbines. * euphemism >but also the fact that the steam turbines are H-U-G-E. That's not enough of a setback to stop most power plants in the world from using the Rankine cycle. You should ask an engineer why this is, I am not one.