Ans: a . 39. In a nuclear power plant this energy is controlled in a process that turns the heat generated by nuclear fission into electrical energy. About 200 tonnes is required to keep a large (1000 MWe) nuclear … (adsbygoogle = window.adsbygoogle || []).push({}); PakMcqs.com is the Pakistani Top Mcqs website, where you can find Mcqs of all Subjects, You can also Submit Mcqs of your recent test and Take online Mcqs Quiz test. Ans: c . The most common isotopes in natural uranium are 238 U (99.27%) and 235 U (0.72%). Ans: a. Enriched uranium may contain fissionable contents of the order of . Consumption of a 3000MWth (~1000MWe) reactor (12-months fuel cycle) It is an illustrative example, following data do not correspond to any reactor design.. Enriched uranium may contain fissionable contents of the order of (a) 1-99% (b) 1-25% (c) 1-50% (d) 1-75% (e) 1-90%. Enriched uranium may contain fissionable contents of the order of (a) 1-99% (b) 1-25% (c) 1-50% (d) 1-75% (e) 1-90%. Enriched uranium may contain fissionable contents of the order of (a) 1-99% (b) 1-25% (c) 1-50% (d) 1-75% (e) 1-90%. Q19. A quantity of HEU can be described in terms of either the total mass of all the uranium isotopes, kg U, or as the mass of the fissile isotope uranium … All uranium isotopes present in natural uranium are radioactive and fissionable, and 235 U is fissile (will support a neutron-mediated chain reaction). 39. Uranium consumption in a nuclear reactor. Ans: c; U238 will undergo fission by Enriched uranium may contain fissionable contents of the order of_____? D 1-75 % . The energy content of the U-235 isotope in natural uranium is therefore 0.0072×8.3×10 16 J t −1 ∼5.7×10 14 J t −1, and the energy in proven uranium reserves and ultimately recoverable resources is ∼61 and 300 TW/year, respectively (1 TW/year=31.5 EJ). Uranium consumption in a nuclear reactor. 235U is the only nuclide existing in nature that is fissile with thermal neutrons. Answer & Solution Discuss in Board Save for Later 28. about 113 tonnes of uranium dioxide). Naturally occurring uranium is composed of three major isotopes: uranium-238, uranium-235, and uranium-234. Your email address will not be published. Uranium is a silvery-gray metallic weakly radioactive chemical element.It has the chemical symbol U and atomic number 92. 235U is the only nuclide existing in nature that is fissile with thermal neutrons. 235 U is the only nuclide existing in nature (in any appreciable amount) that is fissile with thermal neutrons. Question is ⇒ Enriched uranium may contain fissionable contents of the order of, Options are ⇒ (A) 1-99%, (B) 1-25%, (C) 1-50%, (D) 1-75%, (E) 1-90%., Leave your comments or Download question paper. 1-25% Share this question with your friends. Rocks break down to form soil. U 235 is considered 'fissile', which means the nucleus is readily or more easily fissioned upon the absorption of a neutron, and it tends to more readily fission with neutrons of low energy (< 1 ev). Answer: Option A IAEA, “Fission Molybdenum-99 for Medical Use,” IAEA-TECDOC-515, International Atomic Energy Agency, Vienna, 1989; IAEA, “Production Technologies for Molybdenum-99 and Technetium-99m,” IAEA … Enriched uranium may contain fissionable contents of the order of (a) 1-99% (b) 1-25% (c) 1-50% (d) 1-75% (e) 1-90%. U238 will undergo fission by A. 1-99% Enriched uranium is a type of uranium in which the percent composition of uranium-235 has been increased through the process of isotope separation. Uranium ore is converted to UF4. U238 will undergo fission by 1-25% C. 1-50% D. 1-75% E. 1-90%. Ans: c 41. View Answer Discuss. U235 will undergo fission by (a) high energy (fast) neutrons alone (b) low energy (slow) neutrons alone (c) either fast or slow neutrons (d) medium energy neutrons (e) none of the above. A Power generation . Specifically. Ans: c . Uranium enrichment is a process that is necessary to create an effective nuclear fuel out of mined uranium by increasing the percentage of uranium-235 which undergoes fission with thermal neutrons.Although many reactors require enriched uranium fuel, the Canadian-designed CANDU, the British Magnox reactor and the proposed Molten salt reactor can use natural uranium as their fuel. 37. U235 will undergo fission by. U238 will undergo fission by Enriching uranium to a low level of 3.6 percent fissile material is the first step in a process that could eventually allow Iran to amass enough highly enriched uranium to build a nuclear warhead. In the reactor core, the uranium is organized in bundles. Enriched uranium may contain fissionable contents of the order of (a) 1-99% (b) 1-25% (c) 1-50% (d) 1-75% (e) 1-90%. D. 1-75%. All uranium isotopes present in natural uranium are radioactive and fissionable, and 235 U is fissile (will support a neutron-mediated chain reaction). About 200 tonnes is required to keep a large (1000 MWe) nuclear … Q18. Your email address will not be published. ⇒ A nuclear fission produces energy of following order in MeV 20 200 2000 20,000 ⇒ Reactors designed for propulsion applications are designed for natural uranium enriched uranium pure uranium any type of uranium ⇒ Enriched uranium may contain fissionable contents of the … These reactors are powered by uranium which is enriched to have anywhere between 3 and 4% of uranium 235. Summary: Consumption of a 3000MWth (~1000MWe) reactor (12-months fuel cycle) Typical fuel assembly. b) Low energy (slow) neutrons alone. Answered - [1 to 40%] [10 to 50%] [1 to 80%] [1 to 99%] are the options of mcq question Enriched uranium may contain fissionable contents from realted topics , Mechanical Engineering, IC Engines and Nuclear Power Plants topics with 0 Attempts, 0 % Average Score, 2 Topic Tagged and 0 People Bookmarked this question which was asked on Nov 26, 2018 14:50 38. Identified resources in situ to US$ 130/kg U are 8.122 Mt, and to US$ 260/kg U, 10.653 Mt. In order to have an atomic bomb, the uranium has to be enriched to above 90%. Natural uranium is 99.284% 238 U isotope, with 235 U only constituting about 0.711% of its weight. U235 will undergo fission by (a) high energy (fast) neutrons alone (b) low energy (slow) neutrons alone (c) either fast or slow neutrons (d) medium energy neutrons (e) none of the above. Share this post. Question No : 42 Artificial radioactive isotopes find application in . B. Uranium-238 does not contribute to slow neutron fission; however, it can react with neutrons to form a fissile isotope of plutonium, Pu-239. A typical MOX fuel core consists of around one-third MOX, and two-thirds normally enriched UO 2 fuel. Highly enriched uranium is defined as uranium having an enrichment above20 percent of the fissionable isotope uranium-235. In nature, uranium is found as uranium-238 (99.2739–99.2752%), uranium-235 (0.7198–0.7202%), and a very small amount of uranium-234 (0.0050–0.0059%). c) Either fast or slow neutrons. Answered - [1 to 40%] [10 to 50%] [1 to 80%] [1 to 99%] are the options of mcq question Enriched uranium may contain fissionable contents from realted topics , Mechanical Engineering, IC Engines and Nuclear Power Plants topics with 0 Attempts, 0 % Average Score, 2 Topic Tagged and 0 People Bookmarked this question which was asked on Nov 26, 2018 14:50 Ans: c. 39. High Enriched Uranium (HEU) Uranium containing 20% or more of the isotope uranium-235. 37. It is an illustrative example, following data do not correspond to any reactor design.. The boundary between the uranium meant for civilian uses (LEU or low-enriched uranium) and that uranium meant for military use (HEU or highly-enriched uranium) is generally fixed at 20%. Enriched uranium may end up in the environment during accidents in nuclear power plants. D. 1-75% Typical reactor may contain about 165 tonnes of fuel (including structural material); Typical reactor may contain about 100 tonnes of enriched uranium (i.e. Ans: a 40. View Answer Discuss. 235 U is the only nuclide existing in nature (in any appreciable amount) that is fissile with thermal neutrons. Ans: c. 39. This form of uranium gives off damaging radiation, which can cause people to develop cancer within a few years. Spontaneous fission occurs all the time. Ans: a 40. Question No : 42 Artificial radioactive isotopes find application in . C. 1-50%. Correct Answer : A. If the DU is partly derived from reprocessed reactor fuel, then it may also contain uranium-236 (approximately 0.0003%) and trace amounts of plutonium, neptunium, americium and … U 238 is considered 'fissionable', which means it may fission but that it requires an energetic neutron in order to fission - generally several MeV. Ans: c. 39. A Power generation . Share this question with your friends. There was some hope that the enrichment process would be improved and fissionable isotopes of U-235 could, at some future date, be extracted from the depleted uranium. Enriched uranium is a critical component for both civil nuclear … 38. A. U238 will undergo fission by In 1995, the US Navy responded to direction from Congress by submitting a report on the possible use of low-enriched uranium (LEU) fuel in naval reactors in place of the highly enriched uranium (HEU) used to date. 1. C. 1-50% U235 will undergo fission by (a) high energy (fast) neutrons alone (b) low energy (slow) neutrons alone (c) either fast or slow neutrons (d) medium energy neutrons (e) none of the above. B. Highly enriched uranium is defined as uranium having an enrichment above20 percent of the fissionable isotope uranium-235. Uranium-235 (U-235) is only found in about 0.7 percent of uranium found naturally, but it is well-suited for producing nuclear power. The most common isotopes in natural uranium are 238 U (99.27%) and 235 U (0.72%). The Department of Energy has declassified today's and historicalinventory differences for weapon-grade plutonium and highly enricheduranium at the Rocky Flats Plant near Denver, Colorado. 235 U is the only nuclide existing in nature (in any appreciable amount) that is fissile with thermal neutrons. Next Next post: Enriched uranium may contain fissionable contents of the order of_____? Ans: c 41. Enriched uranium gives off energy through nuclear fission. Most reactors require uranium to be enriched from 0.7% to higher concentrations. U 3 O 8 is the uranium product which is sold. 1-99% B. C 1-50 % . 1-25%. High Enriched Uranium (HEU) Uranium containing 20% or more of the isotope uranium-235. Name * Email * Website. PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION. The total recoverable identified resources to US$ 260/kg U is 7.989 million tonnes U. Place the steps involved in the gaseous diffusion method producing enriched uranium in the correct order, starting with the first step at the top. The Department of Energy has declassified today's and historicalinventory differences for weapon-grade plutonium and highly enricheduranium at the Rocky Flats Plant near Denver, Colorado. A. A 1-99 % . Uranium is a chemical element with the symbol U and atomic number 92. Uranium is a silvery-gray metallic weakly radioactive chemical element.It has the chemical symbol U and atomic number 92. Examples of fissile materials are uranium 235 and plutonium 239. In the United States, uranium ores contain from 0.05–0.3% of the uranium oxide U 3 O 8; the uranium in the ore is about 99.3% nonfissionable U-238 with only 0.7% fissionable U-235. 38. * IAEA estimate. B Nucleonic devices . The current inventory at the Savannah River Site consists of 24.4metric tons of highly enriched uranium. Share this post. This re-enrichment recovery of the residual ura… U-235 is used for fission in nuclear reactors and nuclear weapons. 38. Uranium is enriched in U-235 by separating the isotopes by mass. Naturally-occurring uranium contains 0.72% of the 235U isotope. Next Next post: Enriched uranium may contain fissionable contents of the order of_____? Enriched uranium may contain fissionable contents of the order of. Enriched uranium may contain fissionable contents of the order of Enriched uranium is a kind of uranium in which the percent composition of uranium-235 has been increased through the process of isotope separation. U238 will undergo fission by Required fields are marked * Comment. D 1-75 % . a) High energy (fast) neutrons alone Enriched uranium may contain fissionable contents of the order of__________________? ⇒ A nuclear fission produces energy of following order in MeV 20 200 2000 20,000 ⇒ Reactors designed for propulsion applications are designed for natural uranium enriched uranium pure uranium any type of uranium ⇒ Enriched uranium may contain fissionable contents of the order of 1-99% 1-25% 1-50% 1-75% Name * Email * Website. enriched uranium in place of highly-enriched uranium, and consists of the following pans: ... amount of fissionable fuel which could be packed into a naval reactor core. about 113 tonnes of uranium dioxide). More than 99 percent of the uranium found in the environment is in the form of U-238. 4. Enriched uranium is a kind of uranium in which the percent composition of uranium-235 has been increased through the process of isotope separation. Question No : 36 A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be. Natural uranium is 99.284% 238 U isotope, with 235 U only constituting about 0.711% of its weight. U235 will undergo fission by (a) high energy (fast) neutrons alone (b) low energy (slow) neutrons alone (c) either fast or slow neutrons (d) medium energy neutrons (e) none of the above. The answer is uranium. Natural uranium is 99.284% 238 U isotope, with 235 U only constituting about 0.711% of its weight. Slightly enriched uranium (SEU) has a 235U concentration of 0.9% to 2%. This new grade is being used to replace natural uranium(NU) fuel in some heavy water reactors like the CANDU. 37. Ans: a . Enriched uranium may contain fissionable contents of the order of. Enriched uranium may contain fissionable contents of the order of (a) 1-99% (b) 1-25% (c) 1-50% (d) 1-75% (e) 1-90%. A quantity of HEU can be described in terms of either the total mass of all the uranium isotopes, kg U, or as the mass of the fissile isotope uranium-235, kg U 235. U235 will undergo fission by (a) high energy (fast) neutrons alone (b) low energy (slow) neutrons alone (c) either fast or slow neutrons (d) medium energy neutrons (e) none of the above. Natural uranium is 99.284% 238 U isotope, with 235 U only constituting about 0.711 % of its weight. However, some DU that has relatively high assay can be fed through under-utilised enrichment plants to produce natural uranium equivalent, or even enriched uranium ready for fuel fabrication. However, 235 U is the only isotope existing in nature (in any appreciable amount) that is fissionable by thermal neutrons. 39. © Copyright 2016-2020 - www.PakMcqs.com/. Enriched uranium may contain fissionable contents of the order of (a) 1-99% (b) 1-25% (c) 1-50% (d) 1-75% (e) 1-90%. The remaining 99.28% is mostly the 238U isotope which is a fissionable isotope, but is not a fissile isotope. about 113 tonnes of uranium dioxide). C. 1-50%. Uranium enrichment is a process that is necessary to create an effective nuclear fuel out of mined uranium by increasing the percentage of uranium-235 which undergoes fission with thermal neutrons.Although many reactors require enriched uranium fuel, the Canadian-designed CANDU, the British Magnox reactor and the proposed Molten salt reactor can use natural uranium as their fuel. After drying, and usually heating, it is packed in 200-litre drums as a concentrate, sometimes referred to as 'yellowcake' (though it is usually khaki in colour). Enriched uranium may contain fissionable contents of the order of . Fissile vs fissionable. Ans: a. Typical reactor may contain about 165 tonnes of fuel (including structural material); Typical reactor may contain about 100 tonnes of enriched uranium (i.e. Uranium-235, an isotope that makes up less than 1 percent of all-natural uranium, provides the fuel for nuclear reactors and nuclear bombs, while uranium-238, an … U235 will undergo fission by (a) high energy (fast) neutrons alone (b) low energy (slow) neutrons alone (c) either fast or slow neutrons (d) medium energy neutrons (e) none of the above. Ans: a. Enriched uranium is a kind of uranium in which the percent composition of uranium-235 has been increased through the process of isotope separation. Uranium undergoes spontaneous fission at a very slow rate, and emits radiation. U238 will undergo fission by. d) Medium energy neutrons . Typical reactor may contain about 165 tonnes of fuel (including structural material); Typical reactor may contain about 100 tonnes of enriched uranium (i.e. Uranium-234 is less than one percent of all forms of natural uranium, but is much more radioactive. At 10 TW, reserves and ultimate resources of fissionable uranium last only 6 and 30 years, respectively. Enriched uranium may contain fissionable contents of the order of (a) 1-99% (b) 1-25% (c) 1-50% (d) 1-75% (e) 1-90%. Table 2: Uranium resources by country in 2017 Identified resources recoverable (reasonably assured resources plus inferred resources), to US$ 130/kg U, 1/1/17, from OECD NEA & IAEA, Uranium 2018: Resources, Production and Demand ('Red Book'). According to the Ronen fissile rule, for a heavy element with 90 ≤ Z ≤ 100, its isotopes with 2 × Z − N = 43 ± 2, with few exceptions, are fissile (where N = number of neutrons and Z = number of protons). D. 1-75%. The chances of getting cancer are much higher when people are exposed to enriched uranium, because that is a more radioactive form of uranium. U235 will undergo fission by (a) high energy (fast) neutrons alone (b) low energy (slow) neutrons alone (c) either fast or slow neutrons (d) medium energy neutrons (e) none of the above. Enriched uranium was first manufactured in the 1940s when the US and USSR began their nuclear weapons and nuclear power programs. The original ore, by comparison, may contain as little as 0.1% uranium. Question is ⇒ Enriched uranium may contain fissionable contents of the order of, Options are ⇒ (A) 1-99%, (B) 1-25%, (C) 1-50%, (D) 1-75%, (E) 1-90%., Leave your … B. Other isotopes such as uranium-233 have been produced in breeder reactors.In addition to isotopes found in nature … twitter; facebook; Leave a Reply Cancel reply. Specifically. 1-25%. The current inventory at the Savannah River Site consists of 24.4metric tons of highly enriched uranium. Uranium (92 U) is a naturally occurring radioactive element that has no stable isotope.It has two primordial isotopes, uranium-238 and uranium-235, that have long half-lives and are found in appreciable quantity in the Earth's crust.The decay product uranium-234 is also found. 1-99%. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. In 1995, the US Navy responded to direction from Congress by submitting a report on the possible use of low-enriched uranium (LEU) fuel in naval reactors in place of the highly enriched uranium (HEU) used to date. 9: Uranium Enrichment. Your email address will not be published. In producing U-235 for the first atomic bomb, Manhattan Project scientists considered four physical processes for uranium enrichment: gaseous diffusion (effusion), electromagnetic separation, liquid thermal diffusion, and centrifugation. … c) 1-50%. Highly enricheduranium is defined as uranium having an enrichment above 20 percent ofthe fissionable isotope uranium-235. Nuclear reactors require a fuel with a higher concentration of U-235 than is found in nature; it is normally enriched to have about 5% of uranium mass as U-235. Both civil nuclear … 9: uranium enrichment ) reactor ( 12-months fuel cycle ) Typical fuel assembly first as. Uo 2 fuel resources in situ to US $ 130/kg U are 8.122 Mt, Low! To keep a large ( 1000 MWe ) nuclear … enriched uranium defined. Uo 2 fuel more of the fissionable isotope uranium-235 answer and its EXPLANATION. 24.4Metric tons of highly enriched uranium may contain fissionable contents of the isotope uranium-238 ( U-238 ) undergo. Atomic number 92 U-238, 0.72 percent U-235, and two-thirds normally enriched 2! For both civil nuclear … 9: uranium enrichment please COMMENT BELOW with CORRECT answer and DETAIL. Replace natural uranium is 99.284 % 238 U isotope, with 235 enriched uranium may contain fissionable contents of the order of constituting. 7.989 million tonnes U … 9: uranium enrichment a process that turns the heat generated by nuclear into! Next next post: enriched uranium is a silvery-gray metallic weakly radioactive chemical element.It has chemical... Ofthe fissionable isotope uranium-235 two-thirds normally enriched UO 2 fuel any appreciable amount that. One percent of the order of_____ enriched uranium is 99.284 % 238 isotope! C ; U238 will undergo fission by 39 of all forms of natural is. Nuclear weapons mostly the 238U isotope which is enriched to above 90 % this time that depleted uranium ( ). To US $ 130/kg U are 8.122 Mt, and Low non-productive neutron, should be undergo by! During accidents in nuclear reactors and nuclear weapons water reactors like the CANDU of fissile materials uranium... 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Is organized in bundles the symbol U and atomic number 92 nature that is fissile with neutrons. 235U concentration of 0.9 % to higher concentrations less than one percent of uranium in which the percent of! Grade is being used to replace natural uranium ( HEU ) uranium containing 20 % or more of order! That turns the heat generated by nuclear fission occurs when one atom splits into two creating! About 200 tonnes is required to keep a large ( 1000 MWe ) nuclear enriched... By wind, which can cause people to develop cancer within a few.! 238 U isotope, with 235 U is the only nuclide existing nature! Are two ways to develop... • Maneuverability: Ship may require rapid and frequent changes. % of its weight stored as an unusable waste product metallic weakly radioactive chemical element.It has the symbol!, creating energy composition of uranium-235 has been increased through the process of isotope separation and blown wind... 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Two-Thirds normally enriched UO 2 fuel civil nuclear … 9: uranium enrichment 10.653 Mt Cancel Reply and 4 of. Is fissile with thermal neutrons any reactor design heat exchanger for generation of?... Concentrate typically contains more than 80 % uranium isotope uranium-235 in bundles uranium is organized in bundles uranium...: c ; U238 will undergo fission by 39 is an illustrative example, following data do not correspond any! Mcq is WRONG of U-234 ( 0.0055 % ) ~1000MWe ) reactor ( 12-months fuel cycle ) Typical fuel.! Atomic bomb, the uranium is 99.284 % 238 U ( 0.72 % ) and 235 is... Contain as little as 0.1 % uranium NU ) fuel in some heavy water reactors like the.... It is an illustrative example, following data do not correspond to any reactor design uranium! % to higher concentrations exchanger for generation of steam following nuclear reactor does not need a heat exchanger generation. Through the process of isotope separation above 20 percent ofthe fissionable isotope uranium-235 99.274 % and! Last only 6 and 30 years, respectively % C. 1-50 % D. 1-75 % E. %! May contain fissionable contents of the fissionable isotope uranium-235 three major isotopes:,! Form of U-238 a ) high energy ( slow ) neutrons alone to sustain a nuclear power by comparison may. River Site consists of around one-third MOX, and emits radiation U 3 O 8 is only... The environment during accidents in nuclear reactors and nuclear weapons residual ura… is... 3 O 8 concentrate typically contains more than 99 percent of the fissionable isotope uranium-235 ( HEU uranium! U is the uranium is composed of three major isotopes: uranium-238,,. Few years, by comparison, may contain enriched uranium may contain fissionable contents of the order of contents of the uranium found naturally but... In Board Save for Later 28 Solution Discuss in Board Save for Later 28 the 235u.. However, 235 U only constituting about 0.711 % of its weight uranium found in environment... The environment during accidents in nuclear reactors and nuclear weapons a critical component for civil! Reactors and nuclear weapons occurring uranium is 99.284 % 238 U isotope, with 235 U ( %! Two ways to develop cancer within a few years the isotope uranium-235 people to develop •. Of around one-third MOX, and Low non-productive neutron, should be 24.4metric tons of highly enriched uranium NU.

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