Q&A · 4:22:11-4:31:00

Molten-salt and liquid-metal reactors are different naval technologies

The panel corrects a confusion between molten-salt and liquid-metal reactors and identifies lead-bismuth as the Alfa-class coolant.

Question

Have molten-salt reactors found a practical naval role?

Short answer

The discussion finds no clear operational example and corrects an initial confusion with Soviet liquid-metal reactors, whose Alfa-class coolant was lead-bismuth rather than molten salt.

Notes

The attempt to identify a naval molten-salt reactor begins with uncertain recollections about Soviet submarines. K-27 is suggested without being established as a valid molten-salt example. Notes on Akula identify pressurised-water reactors, while the Alfa class is distinguished as using liquid metal. The final correction identifies Alfa's coolant as lead-bismuth, rather than sodium or molten salt. Corrosion is raised as an obstacle to naval use of molten-salt systems. Molten salts and liquid metals remain different coolant categories despite the initial confusion.