The molten sodium is a storage of energy in the form of heat. Keep it well contained and insulated, and you draw off only the heat that is needed to convert to kinetic energy, which then generates electric current through induction.
Like a monster flywheel, there are all kinds of things that might go wrong, but they're all far less scary than Chernobyl style meltdowns.
Like a monster flywheel, there are all kinds of things that might go wrong, but they're all far less scary than Chernobyl style meltdowns.