Alternative power cycles for selected Generation-IV reactors

This chapter examines power-cycle alternatives for a selection of Generation-IV nuclear reactors. Basic power-cycle options are discussed for different reactor technologies, with the three best-known and proven cycles described, along with their limitations for Gen-IV reactor use. The main conclusion presented, based on proven experiences in the thermal power industry, is that high-temperature Generation-IV nuclear-power reactors such as VHTRs and GFRs helium-cooled with maximum outlet temperatures up to 1000°C and 850°C, respectively, must be connected to combined power cycles. The chapter examines cycle alternatives for gas-cooled reactors (VHTRs and GFRs) and SFRs, and compares several cycles in terms of thermal efficiency. Numerous graphs and charts are provided of simplified reactor layouts with power-cycle comparisons.