16 .0 CONCLUSIONS The large number of system and subsystem elements under continued study required extensive tradeoffs and comparisons of many options in each area. These efforts are far from being complete and require further extensive in-depth analyses and optimizations; therefore, only the following tentative conclusions can be drawn at this time. • This study effort has improved and expanded the understanding and identification of critical technology areas and of required technology advancement and verification programs. • Progress has been made in further definition of the key issues associated with each program element. • Improved cost and economic analyses have shown that SPS remains cost competitive with other energy sources for the planned implementation period. • All study results indicate that further program definition efforts are warranted.
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