Simple, heat something up and run a turbine. With D-T (the easiest fuel), the energy output is 80% neutron radiation so a heat cycle is your only option regardl

Simple, heat something up and run a turbine. With D-T (the easiest fuel), the energy output is 80% neutron radiation so a heat cycle is your only option regardless of reactor design. To avoid a turbine, you need a fuel whose output is mainly fast-moving charged particles.