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Nuclear Power Technologies through Year 2035
Published in D. Yogi Goswami, Frank Kreith, Energy Conversion, 2017
Kenneth D. Kok, Edwin A. Harvego
Gas-cooled fast reactor (GFR) System is a fast neutron spectrum reactor that uses helium as the primary coolant. It is designed to operate at relatively high helium outlet temperatures, making it a good candidate for the high-efficiency production of electricity or hydrogen. As shown in Figure 15.5, a direct Brayton cycle is used for the production of electricity with the helium gas delivered from the reactor outlet to a high-temperature gas turbine connected to a generator that produces electricity. In alternative designs, the high-temperature helium can also be used to produce hydrogen using either a thermochemical process or high-temperature electrolysis, or for other high-temperature process heat applications.
Preliminary Neutronics Design and Analysis of the Fast Modular Reactor
Published in Nuclear Science and Engineering, 2023
Hangbok Choi, Darrin Leer, Matthew Virgen, Oscar Gutierrez, John Bolin
The fast modular reactor1 (FMR) is a helium-driven, direct Brayton cycle, gas-cooled fast reactor (GFR) being developed by General Atomics (GA) under the Advanced Reactor Concepts-20 (ARC-20) program. The goal is to advance the FMR design for flexible and dispatchable carbon-free power for the 2035 U.S. energy market. The conceptual design will develop and verify simplified characteristics, such as the inert helium gas coolant, pellet-loaded fuel rod, installations free of heat sink requirements, and small and passive heat removal systems, that will result in a safe, maintainable, cost-effective, distributed, nuclear energy–generating station. The design process includes the exploration of concepts and specifications to meet the design goals and the development of alternatives that are technically viable, affordable, and sustainable. The conceptual design will eventually provide sufficient details to produce a more refined cost estimate.