Centrifugally confined Direct Fusion Drive propulsion has the capability of greatly advancing humanity’s ability to traverse and explore the solar system. p-11B is a promising fusion fuel to use in such a system because the reaction is aneutronic. However, a large amount of bremsstrahlung radiation is produced and must be converted into electricity to power the electric field used to help confine the fusion plasma. This work details an idealized analytical model to determine the viability of using a thermionic energy converter for this purpose. The model finds a maximum power density of 105W/m2 with a Carnot efficiency of 30%. The required electric and magnetic fields to produce net positive fusion power are >350MV/m and ∼30T respectively. This data is then used to discuss the feasibility of using p-11B as a fusion fuel for Direct Fusion Drive.