XI. PROGRAM COST AND ECONOMIC ANALYSIS A. Methodology The SPS design concepts evaluated involve improved technology in several areas as well as new and vastly expanded space activities over those which have been accomplished to date. The economic analysis and evaluation of SPS are based on projections of capability and technology resulting from a major development program as described in section X. For analytic purposes, it was assumed that the SPS ground-receiving stations (rectennas) would be operated as baseload power sources in a large power grid. This grid would include conventional powerplants (nuclear and fossil fuel) for both baseload and peaking requirements. The general approach adopted was to derive program costs and the associated power production costs for the implementation of 112 10-GW power stations over a period of 30 years beginning in 1995. The program costs were used to determine SPS unit costs. Annual operating and maintenance (0&M) costs were also determined as were the return rates necessary to amortize design, development, test, and evaluation (DDT&E) costs. These costs are then compared with costs of conventional baseload and other future power systems. B. SPS Costs The major cost elements of the SPS are as follows: 1. Power Station System - consists of capital cost of Solar Energy Collection System, Microwave Power Transmission System, and the Microwave Reception and Conversion System. 2. Space Transportation System - consists of capital cost and operation cost of HLLV's, COTV's, logistic vehicles (PLV's, POTV's) and associated launch, recovery, and refurbishment facilities. 3. Space Construction System - consists of capital costs of space facilities and equipment for construction and assembly of power station systems, including manpower requirements. 4. Operational Costs - consists of costs of manpower, transportation, consumables, and repair/replacement hardware for sustaining and maintaining operation of the power station system. 5. DDT&E Costs - consists of all nonrecurring research and development funds expended prior to initiation of commercialization (1995). The preceding cost elements may be expressed in milIs/kWh and combined to obtain a total cost of electricity (COE) at the busbar as follows: COE (mil 1s/kWh) = capital recovery + O&M + DDT&E This equation with definition of all terms is shown in figure XI-1. Capital costs.- The capital cost CC of an SPS consists of satellite hardware, satellite construction, space transportation, and ground Tony Redding Urban Systems Project Office
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