Table 12 Energy Supply Options Si Conventional Conventional coal combustion and combined-cycle plants and nuclear LWRs with advancement to LMFBRs make up this supply option. Coal and uranium would be continually used in conventional systems until they are replaced by improved systems, e.g., combined-cycle coal gasification and the LMFBR. S2 Conventional fuel This supply option includes the use of coal, with utilization plus SPS nuclear only in the form of the LWR, replaced by the SPS when fuel prices for uranium either rise too high or the resource is depleted. S3 Conventional fuel This option utilizes coal, with nuclear in the sources plus fusion form of both the LWR and LMFBR, and replaces these systems with fusion. If fusion is not available when the LWR fuels are running low, the LMFBR would be utilized until fusion technology is available. S4 This is the same as Supply Option 1. S5 Conventional systems Same as Supply Option 2. plus SPS. S6 Conventional systems In this case since the energy demand is expected plus fusion to be low, only nuclear LWRs would be used until fusion would be available. Since the energy demand is low, it is expected that the uranium fuel would last until fusion technology could be applied.
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