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was also provided on the design and construction of a split flow S-CO2 recompression loop incorporating the main compressor together with a second recompressing compressor. JAEA and KAERI contributed results from sodium-CO2 interaction tests. Chemical reaction tests were carried out at JAEA by contacting a small pool of sodium with overlying CO2 gas.3 Continuous reactions between sodium and CO2 accompanied by flames occurred at temperatures higher than 570 to 580°C. This threshold exceeds the core outlet temperature in SFR designs. The main reaction products were determined to be Na2CO3 and gaseous CO; the heat of reaction was measured as 50 to 75 KJ/mol of sodium. KAERI has constructed a new apparatus to investigate sodium-CO2 interactions in both a sodium pool configuration with CO2 above the sodium pool (i.e., surface reaction tests) and a vertical cylindrical capsule in which CO2 is injected near the bottom of a small column of sodium (CO2 injection tests). Some tests were conducted in the pool configuration up to 600°C at 0.1 MPa exhibiting a reaction threshold temperature of 510°C above which the reaction occurs much more rapidly, similar to the threshold effect at 580°C in the JAEA tests. KAERI is analyzing the results to determine reaction rates. Figure 6: KAERI Sodium-CO2 Reaction Test Facility CEA shall also perform sodium-CO2 interaction tests in which a CO2 jet is directly injected inside of a 2 Liter sodium pool in the DISCO2 (Determination of Sodium-CO2 Interactions) facility. Local temperatures will be measured with a movable comb of thermo- couples (Figure 8). Results will be utilized in adjusting existing modeling for sodium-water reaction kinetics4 for application to sodium-CO2 reactions. Tests will begin during 2009 and shall be reported to the Project. Figure 7: CEA DISCO2 Sodium-CO2 Interaction Facility. Figure 8: Comb of Thermocouples Inside of the DISCO2 Vessel Moved by a Stepping Motor. SFR Component Design and Balance of Plant GIF Symposium – Paris (France) – 9-10 September, 2009 251PDF Image | SFR COMPONENT DESIGN AND BALANCE OF PLANT PROJECT
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