Turbine. Westinghouse has chosen an eight-stage turbine and optimized it for use with hydrogen. Figure 16 shows this turbine and illustrates the details associated with such a machine. Generator. Westinghouse has chosen a hyperconducting generator as a candidate generator. The availability of liquid hydrogen makes hyperconducting generators a logical choice for consideration. Grumman System description. Grumman developed a hydrogen cooled, open Brayton cycle system to deliver electrical power in the 100s of MW range. The concept utilizes a particle bed reactor in which the fuel is in the form of very small (500 micron) particles in which enriched uranium is encapsulated within protective coatings. The basic fuel particles have been used in gas reactors for a number of years. Use of the particles in this particular reactor configuration is new and for the purpose of developing a high power, light weight reactor. Figure 17 shows the overall concept configuration. Figure 18 shows the system schematic and illustrates the placement of dummy loads around the system to handle load rejection transients.
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