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Advanced Nuclear Power Technology Program A Supercritical Carbon Dioxide Cycle for Next Generation Nuclear Reactors

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Advanced Nuclear Power Technology Program A Supercritical Carbon Dioxide Cycle for Next Generation Nuclear Reactors ( advanced-nuclear-power-technology-program-supercritical-carb )

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Basic Design Point Pressure Temperature Advanced Design Temperature (oP PC) 32.00 60.20 61.10 153.17 157.11 488.75 650.00 521.85 534.31 165.83 157.11 68.91 High Performance Design (kPa) 1 7692.31 (oP PC) 32.00 7692.31 60.20 20000.00 61.10 20000.00 154.02 19981.46 157.99 19981.46 396.54 19922.85 550.00 19792.85 428.81 8039.33 440.29 8039.33 168.34 7878.03 157.99 7878.03 69.59 7702.54 Table 13.1 State points of the selected designs Pressure (kPa) Pressure (kPa) 7692.31 20000.00 20000.00 19990.22 19990.22 19944.56 19814.56 7929.22 Temperature (oP PC) 32.00 60.20 61.10 155.84 159.88 531.33 700.00 565.05 578.31 169.85 159.88 71.05 2id*P P 2 20000.00 20000.00 3id 19988.68 3 19988.68 4 19957.95 5 19827.95 6id 7901.16 6 7901.16 7 7814.21 7929.22 7802.64 7802.64 7704.93 7704.93 7max** 8 7704.58 PP 7814.21 8max 7704.58 *P Pid stands for ideal isentropic expansion or compression 61.10 61.10 7702.56 ** stands for the condition achievable by the maximum regeneration (recuperator effectiveness of 1) 61.10 PP Table 13.2 Thermal and Net Efficiencies for Selected Designs Temperature Turbine Compressor Inlet Inlet 550 42 550 32 650 32 700 32 Conservative Turbomachinery Thermal Net AXIALTM Turbomachinery Thermal Net PP Efficiency Efficiency Efficiency Efficiency 42.59 38.32 44.02 45.27 41.00 47.36 49.54 45.27 51.35 51.27 47.00 53.14 39.75 43.09 47.08 48.87 13.1.5 Description of Selected Designs The three selected designs, the basic, the advanced and the high performance designs are summarized in Table 13.1. The state points were developed for conservative turbomachinery efficiencies (compressor efficiency 89%, turbine efficiency 90%). Note that the best estimate efficiencies predicted by the proprietary code AXIALTM developed by NREC are significantly higher (main compressor 95.5%, recompressing compressor 94.8% and turbine 92.9%). Table 13.2 summarizes the thermal and net efficiencies of the selected designs for both the conservative and the AXIALTM predicted turbomachinery efficiency. The case at 42oP PC is included because currently only a compressor design for 279 PP PP

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