that the assignment of components to general activity, an unnumbered sector, is based on independent estimates by PRC/SSC of the amount of program support and other soft costs as distinguished from hardware requirements. In addition, flight costs are based on a percentage allocation of flight costs developed for the HLLV which indicates that 9% of the cost will accrue to fuel, clearly one of the most energy consumptive of the requirements. Since no specific sector is identified for rocket fuel, the inorganic chemical manufacturing sector (2707) has been used in an approximation for this highly energy intensive component. While rocket fuel may well be more energy consumptive per pound than the average for this sector, it is by no means clear that the energy required per dollar sales is necessarily any higher for rocket fuel. Rocket fuel tends to be quite expensive, and requires substantially more technological and professional input than typical industrial chemicals. These "soft" items add much more to dollar cost than to energy cost. Inorganic chemicals are, in any case, one of the most energy intensive of all 357 sectors. Some partial verification of this approximation may be found in the process energy analysis of transportation presented in Table 5.1 of the ECON study (Ref. All). Converting the energy requirements presented by ECON in gigawatt-hours to Btu at 3414 Btu/kWh indicates a total energy re- 14 quirement for transportation of 1.57 x 10 Btu per satellite, which is 14 virtually identical to the 1.56 x 10 Btu estimated for transportation in Exhibit 47. 12 The energy requirements expressed in 10 Btu in Exhibit 45 result from the multiplication of the dollars ($1974 billion) shown under the cost column by the percent, shown under allocation, and in turn by the coefficient associated with the sector name and number. These coefficients themselves are shown in Exhibit 47 as adapted directly from DSI 038. The DSI methodology itself makes three types of adjustments to a base set of energy requirements per dollar of output developed for the U.S. economy in 1967. The first set of adjustments involves the incorporation of an inflation factor (wholesale price index) and an estimate of the changing energy mix between 1967 and 1974. The results of this
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