This volume contains 12 review papers by prominent members of the space nuclear propulsion research community. The papers summarize key technological advancements that occurred from 1983 to 1993 in such areas as heat pipe technology, fuels, space nuclear safety, dynamic power conversion systems, and advanced radiator technologies for spacecraft power systems. In light of the recent developments that have seen new industry initiatives to form a consortia and the possibility of bi-modal space nuclear power and propulsions systems, this book will of use as a reference for researchers in nuclear power, physicists, chemical and nuclear engineers, and policy makers, both in industry and government, specifically NASA, the US Air Force, members of the European Space Agency, and the Japanese Space Agency.