The power conversion subsystem is the heat-to-electric converter where the thermal power from the reactor is continuously converted to electrical power. The heat rejection subsystem includes coolant, piping, pumps, ducts and heat pipes to transfer the waste heat from the cold side of the heat-to-electric converter to space. The power conditioning, control and distribution subsystem consists of electric power cables, control cables, power electronics, shunt dissipator, batteries, computer hardware and software required to collect, control and distribute the electrical power from the heat- to-electric converter to the user payload electrical bus. The mechanical/structural subsystem includes the structure and deployment devices required to support and deploy the subsystems and mechanically interface the power system with the launch vehicle and the payload. System Status The SP-100 GFS design, specifications and descriptions are complete and the resulting 100 kWe power system configuration is shown in Fig. 5. The major GFS system requirements from the technical specification are shown in Table I. The GFS is designed to deliver a net 100 kWe electric power to the user for an equivalent seven year period during a 10-year total mission time and a net 300 watts electric housekeeping power for the full 10-year mission duration. The key performance parameters of the GFS design are shown in Table II.
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