maximum economic impact, the output from the SPS should be fed into whichever power pool has the larger demand for power at that time. Thus, for 12 hours each day, the power output of the SPS is delivered to the power pool on the East Coast and for the rest of the day, the power from the SPS is delivered to the power on the West Coast. The demand for power from the conventional generators in P^ as a function of time is shown in Figure 2.9. The use of the SPS in this manner reduces the peak demand met by the conventional generators in each power pool by only 2% but reduces the duration of this peak significantly. Each power pool must be evaluated as if it were completely made up of conventional generators for half of the day and made up of conventional generator plus one 5 GWe SPS for other half of the day. There must be one set of fit. 's for that half of the day when the demand for power in one particular power pool is greater than in the other and another set when the conditions are reversed. These two sets of 6tn , the same for each 30 GWe power pool, are given in Jem Appendix A. 2.3.2.3 Number of Required Generators The LOLP of a power pool containing no SPS during the maintenance interval would be
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