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gas cooled reactor uses following materials as moderator, and coolant

Boiling water reactor uses the following as moderator, coolant and working fluid (a) ordinary fluid (b) heavy water (c) molten lead (d) hydrogen gas (e) none of the above. The HTGR (High Temperature Gas-cooled Reactor) uses graphite as a moderator and cycles gas (typically carbon dioxide) under high pressure and high velocity through the uranium fuel assembly. The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is, Q9. Advanced Gas-cooled Reactors (AGR) have been used primarily in UK nuclear generation since the 1980s. With the 3% of market share, all of them are installed in the UK. In the Gas Cooled Reactor (GCR), the moderator is graphite. d) Unity . Research reactors have very simple heat-removal systems, as their primary purpose is to perform research and not generate power. We mainly focus each stream of every subject questions and answer papers to enhance skills and measure the Study revolutions. Q9. 2. A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is, Q13. Ans: c. 35. 35. As a result, higher plant efficiency (40% or more) could be obtained compared to the water cooled design (33-34%). In this case, however, the gas is helium. to use liquid sodium metal as coolant to use intermediate coolant to prevent the water coolant from boiling in the core ⇒ Gas cooled reactor uses following materials as moderator, and coolant graphite, C02 graphite, air heavy water, C02 lead, H2 ⇒ The first unclear power plant in India is located at Kota Kalapakkam Tarapur Baraeilly 8). Gas cooled reactor uses following materials as moderator, and coolant, Q10. Gas-cooled Reactors. Its use is limited to the United Kingdom; it is sometimes known as the Magnox reactor. The nuclear power plant at Tarapur has the following reactor (a) fast breeder (b) pressurised water (c) boiling water (d) sodium graphite (e) none of the above. However they use heavy water as coolant and moderator. The nuclear power plant at Tarapur has the following reactor (a) fast breeder (b) pressurised water (c) boiling water (d) sodium graphite (e) none of the above. Q7. Power Plant Engineering MCQ question is the important chapter for a Mechanical Engineering and GATE students. Such reactors are known as pressurized heavy water reactors (PHWR). 4). Boiling water reactor uses the following as moderator, coolant and working fluid, Q17. Ans: a. Mcq Added by: Muhammad Bilal Khattak. Ans: c 35. motivated the development of the high-temperature gas-cooled reactor (HTGR) with its characteristic reactor core of graphite moderator and ceramic fuel, and its use of the inert helium gas as coolant. The nuclear power plant at Tarapur has the following reactor, Q16. non-fertile materials) and thus use ordinary water as both a moderator and a coolant. Gas cooled reactor uses following materials as moderator, ... Gas cooled reactor uses following materials as moderator, and coolant_____? Progress made in the development of the Experimental Beryllium Oxide Reactor (EBOR) is reported. The resulting design, known as the Advanced Gas-Cooled Reactor (AGR) It uses graphite as the moderator and CO2 as a coolant Steam pressure is around 150 atmospheres and temperature around 5500C Its overall efficiency is about 40% Reactors installed at Calder Hall and Berkely In UK in 1957 are gas cooled reactors. The high-temperature gas-cooled reactors (HTGR) use helium gas at about 800 °C and 5 MPa (685 psi) as the primary coolant, graphite as the neutron moderator and fuel element structural material, and coated (Th-U) carbide or oxide fuel particles dispersed in a graphite matrix as the fuel. An advanced gas-cooled reactor (AGR) is a British design of nuclear reactor.AGRs are using graphite as the neutron moderator and carbon dioxide as coolant. Water and steam are a common fluid used for heat exchange in the primary circuit (from surface of fuel rods to the coolant flow) and in the secondary circuit. The advantage of the design is that the coolant can be heated to higher temperatures than water. Carbon dioxide coolant removes heat from the reactor core, then travels to a heat exchanger. The coolant system plays a pivotal role in performing this function. Gas-cooled Reactors. Because the reactor is dry-cooled and uses virtually no water to operate, it can be sited nearly anywhere, it said. A gas reactor or GCR (English gas cooled reactor) is a type of nuclear nuclear reactor of nuclear fission. Typically-used moderator materials include heavy water, light water, and graphite. Gas-cooled reactor definition: a nuclear reactor using a gas as the coolant . 36. Learn Power Plant Engineering MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Water as a reactor coolant. Graphite is typically used to moderate reactions involving natural uranium fuel. d) Lead, H2 . The neutron moderator of this type of nuclear reactor is graphite. Gas-cooled reactors use graphite as a neutron moderator and carbon dioxide gas as the coolant. Graphite is typically used to moderate reactions involving natural uranium fuel. Q10. helium or carbon dioxide, is used as the coolant. There are several different types of moderating materials, and each have places where they are used more effectively. The turbine can discharge its gas into a large, low pressure cooler to return the gas to the initial compressor inlet conditions. The two commercial reactor types based on this principle are both American designs, but are widely used in over 20 countries. The PBMR is considered as inherently safe because of the choices of materials used as its fuel with confinement in multiple layers, its graphite moderator … Q9. The UK’s Magnox reactor was then followed by the Advanced Gas-cooled Reactor … 4.4 SAFETY ASPECTS OF THE PBMR . Ans: c; Boiling water reactor uses the following as moderator, coolant and working fluid (a) ordinary fluid (b) heavy water (c) molten lead (d) hydrogen gas (e) none of the above. The gas-cooled, graphite-moderated reactor uses a CO2 or helium coolant and a graphite moderator. The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is. Gas cooling, in a closed cycle at high pressure, permits high-temperature operation and consequently high thermal efficiency. The passively safe gas-cooled FMR will use a non-hazardous helium coolant - a chemically-inert gas that is non-explosive, non-corrosive and does not become activated. About 2/3 are pressurized water reactors at even higher pressure. A gas-cooled reactor (GCR) is a nuclear reactor that uses graphite as a neutron moderator and carbon dioxide as coolant. HTGR uses TRISO coated particle fuel, full ceramic core structure, and helium as coolant. Figure 1.2 Schematic: Pressurised Heavy Water Reactor (CANDU) Water Cooled and Moderated By moving to greater levels of enrichment of U235, it is possible to tolerate a greater level of neutron absorption in the core (that is, absorption by non-fissile, non-fertile materials) and thus use ordinary water as both a moderator and a coolant. The nuclear power plant at Tarapur has the following reactor (a) fast breeder (b) pressurised water (c) boiling water (d) sodium graphite (e) none of the above. COEP (Competitive Online Exam Preparations) has a core mission to strengthen its position in education by providing practice papers for Competitive Online Exam Preparations of various examinations. In nuclear fission each neutron that causes fission releases, Q8. A nuclear fission produces energy of following order in mev, Q11. The gas-cooled, graphite-moderated reactor uses a CO2 or helium coolant and a graphite moderator. The fuel, core structure, and coolant in HTGR can all withstand high temperature. A gas-cooled reactor (GCR) is a nuclear reactor that uses graphite as a neutron moderator and carbon dioxide as coolant.Although there are many other types of reactor cooled by gas, the terms GCR and to a lesser extent gas cooled reactor are particularly used to refer to this type of reactor.. Light Water Graphite Reactors Q8. Unlike oxygen, it does not react with carbon (graphite). Which of the following organisations is the oldest. Gas cooled reactor uses following materials as moderator, and coolant . A larger second-generation version is the advanced gas-cooled, graphite-moderated reactor (AGCR). Gas cooled reactors: carbon dioxide (CO2)/ Helium These are the coolants used in respective reactors. During this period, the GCFR concept was found to be more challenging than liquid-metal-cooled reactors, and none were ever constructed. Although there are many other types of reactor cooled by gas, the terms GCR and to a lesser extent gas cooled reactor are particularly used to refer to this type of reactor. It used due to its availability and high heat capacity, both for cooling and heating. The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is. a) Graphite, C02. Page-6 section-1 Ans: c 37. c) Heavy water, C02. Consider the following statements 1. in the second stage of nuclear power programme Fast Breeder reactors (FBRs) use a mixed oxide fuel made from plutonium-239, recovered by reprocessing spent fuel from first stage and natural uranium. The coolant of the nuclear gas reactor is carbon dioxide in the gaseous state. b) Lower. The relative properties of these materials are compared below. As a result of effective co- Which of the following are ferrite materials? Ans: c. 35. Choosing helium has forced gas cooled nuclear power system designers to deal with the considerable challenge of designing and fabricating special purpose helium machinery. d) The material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material, a) %age of U235 has been artificially increased, b) %age of U has been artificially increased, c) %age of U234 has been artificially increased. The fuel used in the Magnox is natural uranium whereas, in the AGR, it uses enhanced uranium. 35. The nuclear power plant at Tarapur has the following reactor (a) fast breeder (b) pressurised water (c) boiling water (d) sodium graphite (e) none of the above. d) Lead, H2 . Amongst the following, the fissionable materials are . Gas Cooled, Graphite Moderated Of the six main commercial reactor types, two (Magnox and AGR) owe much to the very earliest reactor designs in that they are graphite moderated and gas cooled. A larger second-generation version is the advanced gas-cooled, graphite-moderated reactor (AGCR). A stage-Ill reactor involves a self-sustaining series of … The gas-cooled graphite-moderated nuclear reactor uses natural uranium fuel and carbon dioxide as a coolant. There are other types of reactors besides the standard LWR (light water reactor): 1. Nuclear reactor - Nuclear reactor - Coolant system: The function of a power reactor installation is to extract as much heat of nuclear fission as possible and convert it to useful power, generally electricity. U-233 and Pu-239; U-23i and Pu-233; ... moderator should be used; coolant should be employed; ... 10. Several attempts have been made to build reactors of this type, but none has so far entered commercial service.

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