Ans: c; U238 will undergo fission by Uranium is a silvery-gray metallic weakly radioactive chemical element.It has the chemical symbol U and atomic number 92. 39. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. 4. Mcq Added by: Muhammad Bilal Khattak. In a nuclear power plant this energy is controlled in a process that turns the heat generated by nuclear fission into electrical energy. Soil can be moved by water and blown by wind, which moves uranium into streams, lakes and surface water. U238 will undergo fission by. twitter; facebook; Leave a Reply Cancel reply. The U 3 O 8 concentrate typically contains more than 80% uranium. Ans: a. Specifically. Highly enricheduranium is defined as uranium having an enrichment above 20 percent ofthe fissionable isotope uranium … A. Next Next post: Enriched uranium may contain fissionable contents of the order of_____? Q20. Uranium is enriched in U-235 by separating the isotopes by mass. All uranium isotopes present in natural uranium are radioactive and fissionable, and 235 U is fissile (will support a neutron-mediated chain reaction). In order to have an atomic bomb, the uranium has to be enriched to above 90%. Ans: a; 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. 1. 38. B 1-25 % . The current inventory at the Savannah River Site consists of 24.4metric tons of highly enriched uranium. View Answer Discuss. Enriched uranium is a kind of uranium in which the percent composition of uranium-235 has been increased through the process of isotope separation. These reactors are powered by uranium which is enriched to have anywhere between 3 and 4% of uranium 235. 1-99% B. 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 may contain fissionable contents of the order of 39. Correct Answer : A. Depleted uranium (DU) is uranium primarily composed of the isotope uranium-238 (U-238). D. 1-75%. 235 U is the only nuclide existing in nature (in any appreciable amount) that is fissile with thermal neutrons. Your email address will not be published. Highly enriched uranium is defined as uranium having an enrichment above20 percent of the fissionable isotope uranium-235. 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. 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. 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. 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%. 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 may contain fissionable contents of the order of_____? 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 . High Enriched Uranium (HEU) Uranium containing 20% or more of the isotope uranium-235. a) High energy (fast) neutrons alone (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. Spontaneous fission occurs all the time. Your email address will not be published. The chances of getting cancer are much higher when people are exposed to enriched uranium, because that is a more radioactive form of uranium. Promotion) Order 2005, as amended, (the “Order”) or are high net worth bodies corporate, unincorporated associations and partnerships and trustees of high value trusts or other persons falling within Articles 49(2)(a)-(d) of the Order (and the contents 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.. U238 will undergo fission by A typical MOX fuel core consists of around one-third MOX, and two-thirds normally enriched UO 2 fuel. Question No : 42 Artificial radioactive isotopes find application in . 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'). 1-25%. 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. 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. 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. 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. At 10 TW, reserves and ultimate resources of fissionable uranium last only 6 and 30 years, respectively. Examples of fissile materials are uranium 235 and plutonium 239. 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. Natural uranium is 99.284% 238 U isotope, with 235 U only constituting about 0.711% of its weight. The total recoverable identified resources to US$ 260/kg U is 7.989 million tonnes U. B Nucleonic devices . 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). The remaining mass includes 99.274% U-238 and a small amount of U-234 (0.0055%). Ans: c. 39. HEU is uranium in which the percentage of the fissionable isotope U-235 is increased to 20 percent or more beyond the content of 0.7205 percent in naturally occurring uranium. In the reactor core, the uranium is organized in bundles. 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. 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 … about 113 tonnes of uranium dioxide). 1-25% Natural uranium is about 99.27 percent U-238, 0.72 percent U-235, and 0.0055 percent U-234. 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%). B. Enriched uranium is a kind of uranium in which the percent composition of uranium-235 has been increased through the process of isotope separation. Promotion) Order 2005, as amended, (the “Order”) or are high net worth bodies corporate, unincorporated associations and partnerships and trustees of high value trusts or other persons falling within Articles 49(2)(a)-(d) of the Order (and the contents of this Presentation have not been approved by an © Copyright 2016-2020 - www.PakMcqs.com/. Natural uranium contains 0.7205% U-235, the fissile isotope of uranium. 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. Most reactors require uranium to be enriched from 0.7% to higher concentrations. U238 will undergo fission by Required fields are marked * Comment. Enriched uranium may contain fissionable contents of the order of. D 1-75 % . The byproduct of enrichment, called depleted uranium or DU, contains less than one third as … A. 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. Name * Email * Website. 37. A 1-99 % . 1-99% Natural uranium is 99.284% 238 U isotope, with 235 U only constituting about 0.711 % of its weight. D. 1-75%. A 1-99 % . It is an illustrative example, following data do not correspond to any reactor design.. Ans: a. 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 may contain fissionable contents of the order of. Required fields are marked *. The current inventory at the Savannah River Site consists of 24.4metric tons of highly enriched uranium. Naturally occurring uranium is composed of three major isotopes: uranium-238, uranium-235, and uranium-234. 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. Natural uranium is 99.284% 238 U isotope, with 235 U only constituting about 0.711% of its weight. 235U is the only nuclide existing in nature that is fissile with thermal neutrons. The PWR nuclear fuel is enriched uranium dioxide (UO2) that contains about 3 wt% of fissionable 235 U, or mixed uranium-plutonium oxide (MOX) in pellet form. 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. Enriched uranium may contain fissionable contents of the order of . Ans: c . U 3 O 8 is the uranium product which is sold. 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. Other isotopes such as uranium-233 have been produced in breeder reactors.In addition to isotopes found in nature … 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%. Costs are lowered because less uranium and fewer bundles are needed to fuel the reactor. B. 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%. ⇒ 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% 38. The amount of fissionable nuclear fuel required to sustain a nuclear chain reaction is called a ___ mass. Enriched uranium is a type of uranium in which the percent composition of uranium-235 has been increased through the process of isotope separation. The most common isotopes in natural uranium are 238 U (99.27%) and 235 U (0.72%). U 3 O 8 is the uranium product which is sold. D 1-75 % . about 113 tonnes of uranium dioxide). 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). 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. It is a silvery-grey metal in the actinide series of the periodic table.A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.Uranium is weakly radioactive because all isotopes of uranium are unstable; the half-lives of its naturally occurring isotopes range between 159,200 years and 4.5 billion years. About 200 tonnes is required to keep a large (1000 MWe) nuclear … Share this question with your friends. 1-25%. Question No : 42 Artificial radioactive isotopes find application in . Ans: a 40. 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. 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 Answer: Option A Enriched uranium is a critical component for both civil nuclear … Slightly enriched uranium (SEU) has a 235U concentration of 0.9% to 2%. Fissile vs fissionable. 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. Typical reactor may contain about 165 tonnes of fuel (including structural material); Typical reactor may contain about 100 tonnes of enriched uranium (i.e. B 1-25 % . It was at this time that depleted uranium was first stored as an unusable waste product. Correct Answer : A. 38. D. 1-75% PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION. Q18. b) Low energy (slow) neutrons alone. Enriched uranium was first manufactured in the 1940s when the US and USSR began their nuclear weapons and nuclear power programs. B Nucleonic devices . About 200 tonnes is required to keep a large (1000 MWe) nuclear … Weapons grade uranium must contain highly enriched uranium (HEU) with an isotopic concentration greater than 90% U-235. Ans: a . Share this post. 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