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since we should evaluate the possibility of wastage due to the high pressure and temperature leakage. Figure 20 shows the schematics of the Na-CO2 chemical reaction test apparatus; the apparatus is composed of two-types of test-section. One of test-sections is installed to investigate a surface-reaction fundamental characteristic between Na and CO2. The other is mounted to see more real situations, such as the injection of the CO2 gas into the sodium. 5. CONCLUSIONS Systematic research has been conducted to develop a supercritical carbon dioxide Brayton cycle energy conversion system coupled with the KALIMER-600 sodium-cooled fast reactor. Through the studies, a supercritical CO2 Bratyon cycle system coupled to the KALIMER-600 was developed with the design and evaluation of major components such as S-CO2 compressors, S-CO2 turbine, and S-CO2 heat exchangers necessary to the system. In the course of system development, several computer codes were developed for system and component design. The technology and computer code produced through the system development could be used to develop other power plants, such as fossil fuel plants, SFRs, VHTRs, and fusion reactors. In the case of the KALIMER-600 operating conditions, the cycle efficiency and the plant net efficiency are obtained at 42.8% and 40.3%, respectively. From the CFD analysis of the S-CO2 turbomachinery, it seems that the one- dimensional analysis codes should be enhanced to supply the design parameters to the CFD tool by considering the loss model and more empirical manufacturing experiences. For the better performance of the S-CO2 turbomachinery, a semi-three dimensional design tool should be developed before the three dimensional CFD analysis. The new airfoil shape PCHE was developed by using the CFD analysis, which, while maintaining the heat transfer characteristics, offers 1/14 of the pressure loss compared with the previous zigzag type PCHE. ACKNOWLEDGEMENTS This study was performed under the Mid- and Long- term Nuclear R&D Program and the INERI Program sponsored by the Ministry of Education, Science and Technology of the Korean Government. NUCLEAR ENGINEERING AND TECHNOLOGY, VOL.41 NO.8 OCTOBER 2009 1043 CHAetal., DevelopmentofaSupercriticalCO2BraytonEnergyConversionSystemCoupledwithaSodiumCooledFastReactor Fig. 20. Flow Diagram of Na-CO2 Reaction TestPDF Image | DEVELOPMENT OF A SUPERCRITICAL CO2 BRAYTON ENERGY CONVERSION
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