For D-T fusion, the output is 80% neutrons, so the only option is to let them heat something to run a turbine. You also need the neutrons for breeding the triti

For D-T fusion, the output is 80% neutrons, so the only option is to let them heat something to run a turbine. You also need the neutrons for breeding the tritium, so you let your breeding blanket heat up and run coolant pipes through that. Commonwealth plans to use molten FLiBe salt as the breeding blanket and first loop of coolant. Aneutronic fusion produces fast-moving charged particles instead of neutrons, so if anyone gets that working, we could extract electricity without a thermal cycle.