ABSTRACT
Thermionic energy conversion (TEC) is the process of converting heat directly to useful electrical work
by the phenomenon of thermionic electron emission. This fundamental concept can be applied to a
cylindrical version of the planar converter, considered the building block for space nuclear power systems
(SNPS) at any power level. Space nuclear reactors based on TEC can produce power in the range of
5 kWe-5 MWe, a spectrum that serves the needs of current users such as National Aeronautics and
Space Administration (NASA), United States Air Force (USAF), United States Department of Energy
(USDOE), and Ballistic Missile Defense Organization (BMDO). Electrical power in this range is currently
being considered for commercial telecommunication satellites, navigation, propulsion, and planetary
exploration missions.
