Ans: c. 35. Q8. Q4. Which of the following particles is the lightest? In nuclear fission each neutron that causes fission releases, Q8. Gas-cooled Reactors. The fuel, core structure, and coolant in HTGR can all withstand high temperature. Q10. During that period, the GCFR concept was expected to increase the breeding gain, the thermal efficiency of a nuclear power plant, and alleviate some of the problems associated with liquid metal coolants. We mainly focus each stream of every subject questions and answer papers to enhance skills and measure the Study revolutions. A gas reactor or GCR (English gas cooled reactor) is a type of nuclear nuclear reactor of nuclear fission. Ans: c 37. 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. The high-temperature gas-cooled reactor (HTGR) is similar in concept to the AGR. 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. A coolant in a nuclear reactor is a liquid or gaseous substance that passes through the reactor core and removes heat from the nuclear fission reaction.. Graphite is typically used to moderate reactions involving natural uranium fuel. A coolant fluid enters the core at low temperature and exits at a higher temperature after collecting the fission energy. Gas cooled reactor uses following materials as moderator, and coolant. Ans: a Carbon dioxide coolant removes heat from the reactor core, then travels to a heat exchanger. The AGR is a second generation gas-cooled reactor that uses graphite as a neutron moderator and carbon dioxide as the coolant. Ans: c . Gas cooled reactor uses fol... general knowledge. 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. Gas cooled reactor uses following materials as moderator, and coolant, Q10. Gas cooled reactor uses following materials as moderator, and coolant. The fuel used in the Magnox is natural uranium whereas, in the AGR, it uses enhanced uranium. Q9. AGRs were developed from the Magnox type reactor.These are the second generation of British gas-cooled reactors. In most light-water, heavy-water, and gas-cooled power reactors, the coolant is maintained at high pressure. a) Same. 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 following reactor (a) fast breeder (b) pressurised water (c) boiling water (d) sodium graphite (e) none of the above. During that period, the GCFR concept was expected to increase the breeding gain, the thermal efficiency of a nuclear power plant, and alleviate some of the problems associated with liquid metal coolants. Research reactors have very simple heat-removal systems, as their primary purpose is to perform research and not generate power. However they use heavy water as coolant and moderator. Page-6 section-1 5 with a graphite moderator offers enhanced neutronic and thermal efficiencies. b) Lower. 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. Q10. The first nuclear power plant in India is located at, Q15. The gas-cooled, graphite-moderated reactor uses a CO2 or helium coolant and a graphite moderator. 4). Inert gas, e.g. A. graphite, C02 B. graphite, air C. heavy water, C02 D. lead, H2 E. concrete, N2. Mcq Added by: Muhammad Bilal Khattak. The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is, Q9. Its use is limited to the United Kingdom; it is sometimes known as the Magnox reactor. c) Higher. A larger second-generation version is the advanced gas-cooled, graphite-moderated reactor (AGCR). Nuclear Reactor Materials and Fuels Massoud T. Simnad University of California, San Diego ... which include duct or coolant channels, solid moderator and reflector blocks, core sup-port grid structures, coolant piping, heat exchanger mate- ... Carbon-dioxide gas-cooled graphite moderated re-actors. 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. Its use is limited to the United Kingdom; it is sometimes known as the Magnox reactor. Moderator materials suitable for gascooled reactors include graphite, beryllium oxide, and zirconium hydride. 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. The UK’s Magnox reactor was then followed by the Advanced Gas-cooled Reactor … Their usage is subject to reactor design and energy of neutrons populated in the nuclear reactor. 2. 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. A nuclear fission produces energy of following order in mev, Q11. Which of the following is the heaviest? graphite, C02; graphite, air; heavy water, C02; Some other materials (like NaK, Lead) can also be used as coolant in nuclear These reactors are used only in the UK. A gas-cooled reactor is a nuclear reactor that uses graphite as a neutron moderator and carbon dioxide as coolant. Ans: a A review is given of developments in the area of Gas-Cooled Fast Reactors (GCFR) in the period from roughly 1960 until 1980. Water. High Temperature Gas Cooled Reactor (HTGR) provides another solution. a) Graphite, C02. Gas Cooled Reactor: This type of reactor employs a gas (CO 2 or helium) in place of water as the coolant and graphite as the moderator. This concept is supposed to benefit from the research activities of sodium-cooled fast reactors, which uses the same fuel reprocessing technology, and of the VHTR, which uses the same coolant and probably a lot of the same structural materials, power conversion systems and reactor structures. Ans: c. 35. 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 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. Q7. 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. d) Unity . 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. 36. Gas-cooled Reactors. A compilation is presented of the technical information presently available which bears on the problem of selecting a coolant for the graphite- moderated gascooled reactor. 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. In the Gas Cooled Reactor (GCR), the moderator is graphite. High-Temperature Gas-Cooled Reactor. These reactors use C02 like the coolant & graphite like the moderator. The gas cooled reactors a review is given of developments in the UK were with... 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