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Extra resources for Design, Eval of Heat Utiliz Systems - High-Temp Engineering Test Reactor (IAEA TECDOC-1236)
Sample text
35 FIG. 5. Plant implification, steam cycle to the closed cycle gas turbine plant [3]. 36 FIG. 6. Plant efficiency comparison [3]. S. HTGR designer, General Atomics, independently initiated evaluations of the closed cycle gas turbine HTGR concept. Subsequent positive determination of its potential and feasibility resulted in two different, but often similar, designs; the Pebble Bed Modular Reactor (PBMR) and Gas Turbine-Modular Helium Reactor (GT-MHR), respectively. Although the PBMR and GTMHR programs represent the most significant application to date of HTGR development resources, the international interest in the gas turbine modular HTGR system has also lead to the scientific investigation of other concepts [4].
In early 70’s, is one of the most promising processes due to the comparatively low number of reactions, the potential of high thermal efficiency, etc. 5O2 (1) (2) (3) Reaction (1), the so-called “Bunsen reaction”, is an exothermic SO2 gas absorption reaction to be carried out in the temperature range of 20° to 100oC. Thermal decomposition of hydrogen iodide (2) is slightly endothermic and can be carried out in the gas phase or in the liquid phase. Thermal decomposition of sulfuric acid (3) is strongly endothermic and proceeds in two stages: the decomposition of H2SO4 into H2O and SO3 at 300° to 500oC, and the decomposition of SO3 into SO2 and O2 at 800° to 900oC.
This is because a heat exchanger type of endothermic chemical reactor is an essential technology for the production of hydrogen through the use of nuclear heat. (2) Steam generator in the secondary helium loop for stable controllability and as a safety barrier A plant where a process heat application system with an endothermic chemical reactor is connected to an HTGR exhibits thermal dynamics that are quite different than those of an HTGR reactor. 49 FIG. 4. Schematic illustration of the steam reformer.