24-5. EcoNo:vncs Economic considerations were essential to the optimization studies required to establish the reference designs presented in Sections 24-2 and 24-4 . An important objective of this study is the economic comparison of energy costs for the single-fluid and the two-fluid externally cooled LMFR . A brief summary of energy costs for the optimum design in each concept is presented in Table 24-12 . TABLE ENERGY COST
24-12
(80%p
PLANT FACTOR
Mills/kwh
Fixed charges on total capital investment Nuclear fuel and inventory costs Maintenance Operation Interest on working capital Total energy cost, mills/kwh
Single-fluid LIVIFR
Two-fluid LMFR
4 .09 1 .24 1 .18 0 .38 0 .04 6 .9
4 .31 1 .41 1 .05 0 .38 0 .04 7 .2
24-5 .1 Fixed charges on capital investment . Direct construction costs . The estimated costs of equipment, installation of equipment, and construction are based on the plant layouts for the two reference designs evaluated in this study . Construction and erection costs of all items, as well as direct materials costs for those components manufactured by the Babcock Wilcox Company, were developed by B&\V estimators . Delivered costs of equipment supplied by manufacturers other than B&W were taken from vendors' quotations . A summary of direct construction costs for each reference design is tabulated in Tables 24-13 and 24-14 . Total capital investment . The total capital investments are summarized according to account numbers in Tables 24-15 and 24-16 . 24-5 .2 Maintenance and operation . In computing energy costs, the fixed charges on maintenance equipment and spare parts are included in the maintenance costs, while fixed charges on buildings used for maintenance are included in fixed charges on capital investment .