Paul seeks to design a viable nuclear reactor for space applications. MCNP6.1 (Monte Carlo N-Particle code) is being used to systematically evaluate a number of design factors. Simulations are given special care and designed to examine specific parts of potential reactors. Fuels and fuel mixtures, reactor geometry and size, possible moderators, and coolant channels are all items of interest; many of these items require collaboration from other areas of the project as well as from the existing nuclear industry. Through careful iteration and inspection we hope to move towards feasible reactor designs for space applications.