Abstract
The comparative assessment portion of the Satellite Power System (SPS) Concept Development and Evaluation program established by the Department of Energy and the National Aeronautics and Space Administration to generate information from which a rational decision could be made regarding the viability of the SPS is presented. The objective of the comparative assessment is to develop an initial understanding of the SPS with respect to a limited set of energy alternatives. Six alternative technologies (conventional coal combustion; light water reactor; coal gasification/combined cycle; liquid-metal, fast-breeder reactor; terrestrial photovoltaic; and fusion) were compared to the SPS on the basis of available data on cost and performance, health and safety, environmental welfare, resource requirements, and economics. These comparisons are descriptive and do not culminate in any bottom line regarding the overall viability of the SPS.
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