Design of a Nuclear Powered Total Energy System for Fort Bragg, North Carolina.
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF NUCLEAR ENGINEERING
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A Total Energy System TES is designed to supply the thermal and electrical energy requirements of Fort Bragg, North Carolina for a period of 30 years, with startup scheduled for early 1985. Considered for use as the central station power plant for this system are a combined coal gasification, fossil-fired gas turbine CGGT power plant and a direct Brayton cycle high-temperature gas-cooled reactor, helium gas, turbine HTGRGT power plant. Several utility system configurations affording different thermalelectrical energy demand ratios are studied for each supply option. With the primary system optimization criterion being the choice of the TES providing a minimum of total energy costs over the system lifetime, it is found that the optimal thermalelectrical load split for each supply option occurs at approximately 75 of the bases total energy demands supplied thermally. Within the limits of the unit-cost assumptions made and for the range of cases studied, it is found that the present-worth total cost of the optimized HTGRGT system in 1985 dollars is 245.7 million and the corresponding optimal system cost for the fossil CGGT alternative is 181.7 million. Further studies are recommended to investigate the sensitivity of this 26 cost differential to variations in the mode of power plant operation and to design modifications in the thermal energy distribution piping network. Author
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