The 1250-MW LMFBR would reject heat at about 7.5 x 10$ kJ/h through the cooling towers. In addition, there will be miscellaneous thermal losses to air (called general plant losses) amounting to less than 1%, a value typical of present-day nuclear facilities. Approximately 2.8 x 10^ m^ of land will be required for facilities associated with the LMFBR power plant; namely, the reactor buildings, turbine building, switchyard, parking lot, access roads, and cooling towers. As a minimum, an exclusion area of at least 16 x 10$ m^ is needed, and presently most LWR stations are on even larger sites. Water consumption results primarily from cooling tower evaporative losses, cooling tower blowdown, and general plant uses, totalling 1.28 m^/s. By far the largest consumers of water are the mechanicaldraft cooling towers, which use approximately 0.88 m^/s. 3.2.7 Fusion The reference fusion-power plant is based on the NUWMAK power plant design developed by the University of Wisconsin Fusion Engineering Program of the Nuclear Engineering Department.24 The NUWMAK power plant produces electricity through a boilingwater reactor power cycle with heat supplied by a Tokamak fusion reactor. One plant produces 660 MW net, and the power facility characterized here consists of two NUWMAK reactors, producing 1320 MW net power. The NUWMAK discussed here is a newer and more realistic design than the UWMAK series developed by the University of Wisconsin. The objective of the new treatment was to simplify mechanical design and maintainability. The power density in NUWMAK is increased to about 10 W/cm^ as compared to 0.5 to 2 W/cm^ in earlier designs. Figure 3.12 is a schematic of this NUWMAK concept. The reference fusion plant uses deuterium-tritium fuel. During the reactor burn cycle the deuterium (D) and tritium (T) in the toroidal reactor chamber are in a plasma state. When a D-T fusion reaction occurs, a helium-4 nucleus (alpha particle) is formed and a 14-MeV neutron is given off. The high-energy neutrons are absorbed by a blanket that surrounds the fusion reaction chamber. The neutrons heat the blanket, and this heat is then removed from the blanket and used to produce electricity. NUWMAK uses boiling water as a coolant and a conventional boiling-water reactor power cycle to produce electricity. Table 3.8 LMFBR Wastewater Effluents at Nominal (1250 MW) Operat ion
RkJQdWJsaXNoZXIy MTU5NjU0Mg==