Table 13 Evaluation of Energy Supply Options S1-S3 for Demand Scenario UH - Unconstrained, High Demand Low because costs of conventional sources remain relatively lowest of all scenarios . Possible impact of further coal use and nuclear safeguard issues. Welfare: CO2 could become a problem after 2000. Nonrenewable fuel supplies continue to be depleted. Continued development of coal mining and technology in western states. Minimal impact because role of regulatory bodies will remain relatively constant. Higher energy cost than Si because of depleting uranium stocks and the introduction of a new technology. Many new health issues associated with SPS, but conventional problems decreased. Potential CO2 impact is not changed because of other uses; several new SPS issues. Increased land consumption, continued uranium depletion. New technology will affect the economy because of large investments; western states could go through a boom/bust cycle with cost. A whole new set of interactions will develop because of SPS. Higher than Si; slightly lower than S2. New radiation problems. Same as Si. Same as Si. Similar to S2 but probably not as great. Nuclear fission regulatory bodies will probably handle fusion. Electrical energy demand is high because coal and nuclear energy remain relatively cheap. Regulatior impositions will not get much larger. Conservation and sub- sitution do not penetrate to a great degree. Si - Conventional Coal (Conv. and CG/CC) Nuclear (LWR, LMFBR) Continued use of conventional sources with improved systems LMFBR could provide energy for many years. S2 ~ Conventional + SPS (Coal, LWR, SPS) Conventional systems will be used until the SPS is implemented. S3 - Conventional + Fusion (Coal, LWR, LMBFR, and Fus ion) Conventional systems including some form of breeder until fusion technology is available.
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