Vent and Head Spray eam Drye ssembly Steam Separator Feedwater Sparger Core Spray Line Core Spray Sparger Top Guide Fuel Assembles Control Rod Drives Control rod drive In- Core Flx Monito FIGURE 59.9 Typical BWR reactor arrangement. Source: Courtesy of General Electric Company. Hydrothermal Source. This is the most developed source. Power plants, up to a capacity of 2000 MW,are in operation worldwide. Heat from the magma is conducted upward by the rocks. The groundwater drifts down through the cracks and fissures to form reservoirs when water-impermeable solid rock bed is present. The water in this reservoir is heated by the heat from the magma. Depending on the distance from the magma and rock onfiguration, steam, hot pressurized water, or the mixture of the two are generated. Signs of these underwater reservoirs include hot springs and geysers. The reservoir is tapped by a well, which brings the steam-water mixture to the surface to produce energy. The geothermal power plant concept is illustrated in Fig. 59.10 The hot water and steam mixture is fed into a separator. If the steam content is high, a centrifugal separator is used to remove the water and other particles. The obtained steam drives a turbine. The typical pressure is Ine Cooling TTTTT Condenser Condensate FIGURE 59.10 Concept of a geothermal power plant. e 2000 by CRC Press LLC© 2000 by CRC Press LLC Hydrothermal Source. This is the most developed source. Power plants, up to a capacity of 2000 MW, are in operation worldwide. Heat from the magma is conducted upward by the rocks. The groundwater drifts down through the cracks and fissures to form reservoirs when water-impermeable solid rock bed is present. The water in this reservoir is heated by the heat from the magma. Depending on the distance from the magma and rock configuration, steam, hot pressurized water, or the mixture of the two are generated. Signs of these underwater reservoirs include hot springs and geysers. The reservoir is tapped by a well, which brings the steam-water mixture to the surface to produce energy. The geothermal power plant concept is illustrated in Fig. 59.10. The hot water and steam mixture is fed into a separator. If the steam content is high, a centrifugal separator is used to remove the water and other particles. The obtained steam drives a turbine. The typical pressure is FIGURE 59.9 Typical BWR reactor arrangement. (Source: Courtesy of General Electric Company.) FIGURE 59.10 Concept of a geothermal power plant