They do not suffer with weaknesses such as sodium cooled fast reactors. The very-high-temperature reactor (VHTR) (see Fig. The fuel used in the Magnox is natural uranium whereas, in the AGR, it uses enhanced uranium. Given is a diagram illustrating the process by which steam is produced by using a gas cooled nuclear reactor. The Gas Cooled Reactor was one of the original designs. 4.30) is a further step in the evolutionary development of high-temperature reactors (HTRs).The VHTR is a helium-gas-cooled, graphite-moderated, thermal-neutron-spectrum reactor with a core outlet temperature > 900°C, and a goal of 1000°C, sufficient to support high-temperature processes such as production of hydrogen … Fuel assemblies 5. The Magnox reactor is gas cooled (CO2) with graphite moderators. Heat exchanger 10. The reactor coolant is the chemically stable, low-pressure molten fluoride salt mixture, 2LiF:BeF2 (Flibe), with a boiling point of The evolution of gas-cooled reactors is described and the advantages of helium as a reactor coolant stemming from its inertness and the fact that it is a single-phase coolant are discussed. Graphite moderator 4. Charge tubes 2. The MHTGR design utilizes basic high-temperature gas-cooled reactor features of ceramic fuel, helium coolant, and a graphite moderator. Water circulator 9. Water 8. helium or carbon dioxide, is used as the coolant. The fuel is natural uranium in metallic form, ... Simplified schematic diagram of primary coolant circuit 31 Figure 5.11. The modular high-temperature gas-cooled reactor (MHTGR) is an advanced power plant concept that has been under design definition since 1984. Gas-cooled reactors have been used since the earliest days of nuclear power – indeed, it could be argued that Fermi’s first pile in a Chicago squash court was the first gas-cooled reactor, even if the power output was only a few watts. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Gas also allows high Introduction There are a lot of advantages on the side of gas-cooled fast reactors [11]. The fuel in the KP-FHR is the TRISO-coated particle fuel developed for high temperature gas-cooled reactors, which can withstand fuel particle temperatures up to 1600°C. The HTR-10 is a pebble bed HTGR utilizing spherical fuel elements with ceramic coated fuel particles. Steam The diagram below shows the production of steam using a gas cooled nuclear reactor. Write at least 150 words. Concrete pressure vessel and radiation shielding 6. Gas-cooled reactors were used in the early weapons programmes. These reactors are used only in the UK. Vertical arrangement of fuel channels, control rods and pressure vessel These reactors use C02 like the coolant & graphite like the moderator. The diagram illustrates the procedures involved in the production of steam with the help of a gas cooled nuclear reactor. In the Gas Cooled Reactor (GCR), the moderator is graphite. Model Answer. Light Water Graphite Reactors Gas circulator 7. English: Schematic diagram of an Advanced Gas-cooled Reactor type nuclear reactor 1. Keywords: Thermodynamic cycle, Generation IV reactor, Gas cooled reactor, Gas tur-bine. The High-Temperature Gas-Cooled Reactor (HTGR) forms the basis for the current design of a Gas-Cooled Fast Breeder Reactor (GCFR). These are available in two types namely the Magnox and the AGR (advanced gas-cooled reactor). Overall, it can be seen that the reactor and heat exchange are the two main components which help in the production of steam from water. 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