A nuclear power reactor controls the fission chain reaction by moderating the neutrons and with the use of control rods which may be inserted in the reactor core to absorb neutrons and slow down the reaction. Solid- fuel for nuclear reactions may be fabricated into various small shapes such as A fast breeder reactor consists of a core, an inner blanket consisting of a single ring of blanket elements surrounding the core, an outer blanket surrounding the inner blanket and a partition containing a moderating material and, preferably, a material which absorbs thermal neutrons separating the inner blanket from the outer blanket. In fast breeder reactors Spain joined the consortium in 1959. (e) single circuit system. (d) 99.282% U235, 0.712% U234, 0.006% U238 (b) 1-25% For highly irradiated fuel bundles, the coupled simulations were shown to lead to a significant reduction of the diametral strain of the fuel pins, with respect to non-coupled simulations, caused by the deformation-induced cladding temperature increase. (c) pressurised water 1 Little information has become available since Plutonium and Highly Enriched Uranium 1996 was published. Enriched uranium may contain fissionable contents of the order of Ans: d, 83. (c) critical atoms Division of Reactor Development + Technology Reactor Physics Branch (3 copies) Argonne National Laboratory Liquid Metal Fast Breeder Reactor Program Office 9700 South Cass Avenue Argonne, Illinois 60439 (1 copy) U. S. Atomic Energy Commission Cambridge Office (2 copies) Dr. Paul Greebler General Electric Atomic Products Division 175 Curtner Ave. (c) instantaneous release of gamma rays (c) same (d) much less (e) regenerates neutrons. (a) at the lower rate than the consumption (c) 10 tonnes of high grade coal (a) as basic raw material Ans: b, 60. (e) enriching U235. (d) graphite This furthermore conveys how the usage of plutonium made criticism of nuclear power both systematic and inclusive by tying together technological, political, and social risks and establishing a common bond between anti-breeder policies and environmental concerns. Fast Breeder Reactor Figure shows a fast breeder reactor system. (e) none of the above. Fast breeder reactor C. Homogeneous reactor D. Pressurised water reactor ANS:- B. (b) axial A fast neutron reactor is a nuclear reactor in which the fission chain reaction is sustained by fast neutrons. The fast reactor first transforms the 99.3 percent in the original ore abundant fertile isotope U 238 into fissile Pu 239 (e) lithium. (e) reflector should be used. (a) light or heavy water The main interest of shielding in nuclear reactor is protection against There are two fuel cycles investigated for use with breeder reactors: 1. (b) infra-red rays Figure 1. (d) Fast reactor uses moderator (a) demineralised water 2017) that, in order to enhance the aforementioned mechanism by which the rector power is reduced when the sodium density is reduced, has a lower P/D ec than the range recommended by the subassembly design rules in France (CEA 1994). In this conservative approach, the thermal-hydraulic simulations are conducted without considering the geometrical deformation, and the resulting temperature distributions are used as input for the thermomechanical simulations. (e) none of the above. In triggering fission, the following types of neutrons are desirable (e) electrons. Ans: d, 76. Which of the following type of pump is used in liquid metal cooled reactor for circulation of liquid metal Controversy has embroiled all aspects of nuclear power: the safety of reactors, the extent of uranium resources, the effects on health of low levels of ionising radiation, the likelihood of nuclear weapons proliferation, and the effectiveness of various nuclear waste disposal methods. (d) thorium (a) higher cost of nuclear fuel Ans: c, 84. (e) plutonium. Edge effects are not found to have an important impact on the dynamic behaviours of the system. (c) 1 – 2 neutrons (e) natural uranium. Moderators are used to slow down the neutrons without absorbing them. (d) zero throughout (d) control fuel consumption (d) freon (b) zero Enriched uranium is one in which Most of Ans: b, 66. Ans: a, 18. (d) control rods should be used Ans: a, 36. On PISE-2C, free-vibration experiments with different modes of excitations have been conducted, including total flowering, partial flowering with internal crown excited and partial flowering with external crown excited. (a) plates (a) regenerative reactor (a) for boiling pi water in the core Which of the following is the primary fuel (b) low energy (slow) neutrons alone Ans: c, 54. Fast breeders do not require moderationsince the neutrons need to be moving fast, whereas thermal breeders make us of moderation to achieve slower-moving neutrons. The number of operating reactors continues to decline, while only one new plant is scheduled to open and it is well behind schedule and 50% over budget. (a) atomic power (d) any type of uranium GENERAL REVIEW OF THE DECOMMISSIONING OF LIQUID METAL FAST REACTORS (LMFRs) IN FRANCE, Le plutonium et la cohérence du parc électronucléaire français, Chinese Military Plutonium and Highly Enriched Uranium Inventories, Plutonium Breeding in Liquid-Metal Fast Breeder Reactors and Light Water Reactors, The July 1945 Szilard Petition on the Atomic Bomb Memoir by a Signer in Oak Ridge. Home » Mechanical Engineering Multiple Choice Questions » 300+ TOP Nuclear Power Plants Multiple Choice Questions and Answers, 1. And what were the interconnections between the production of plutonium for nuclear reactors and plutonium for atomic bombs? (a) nucleus (d) Baraeilly Which is not identical for an atom and an isotope Ans: b, 67. (c) U238 (a) same (c) thorium (d) cause collision with the fast moving neutrons to reduce their speed (e) nucleus. Access scientific knowledge from anywhere. (e) no moderator is used. (e) it produces tremendous power. (e) all of the above. A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is Fast reactors avoid the use of moderators, such as with a metal coolant like sodium, instead of one of the moderating materials identified above. The unit of radio-activity is (a) greater than 1.0 (c) graphite and concrete (e) 20 MeV. reactors, TECDOC 1405, IAEA, August 2004. (a) no new neutron Ans: a, 10. 3 He added: "Military production has been reduced to the minimum -on State orders, and development of nuclear electric power is our main task." The nation’s nuclear power industry is in trouble. Because nuclear energy is an established technology (unlike many of the proposed technical fixes for our global environmental and resource problems), there is a factual basis for the discussion of these factors. (b) at a higher rate than the constuption Ans: c, 50. (b) pressurised water Ans: c, 48. 33. (c) different masses and different atomic numbers (d) electromagnetic (d) breeds neutrons (b) more a month from 9 October to 8 November 1974. consultation to slow them down; the latter can be qualiﬁed as minimal. Which of the following particles is the lightest (b) liquid metal cooled Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. (c) to use intermediate coolant heavy water). Figure 1 â Types of Nuclear Reactors Plus radium (element 88). In triggering fission, which type of neutrons are more effective Ans: d, 23. The coolant used in boiling water reactor is (c) pressurised water (a) same (c) gas cooled It used a Na-K eutectic alloy that was liquid at room temperature as a coolant. It is penetrated from end to end by hundreds of calandria tubes which accommodate the pressure tubes containing the fuel and coolant. (b) U-238 Also core flowering behaviour is considered as the main initiating event for the four SCRAMs that happened in Phénix reactor during 1989 and 1990. Ans: b, 73. This experimental feedback can highlight several recommendations and a general approach for the decommissioning of future LMFRs still in operation. (a) as basic raw material Ans: c, 63. Ans: b, 44. (e) there is no such unit. (e) none of the above. All these issues are considered in some detail in this chapter, as are the ethical issues that would be involved in a massive shift to nuclear power. Ans: a, 72. (a) lead or concrete The mass number of a substance represents the sum of total number of d'Enquête sur Superphénix et la filière des réacteursà neutrons rapides, enregistré Ans: a, 69. (d) MW Ferrite material is to the First " Castaing Report, " commissioned by the Conseil Supérieur de la S ˆ (e) none of the above. Half life of a radioactive isotope corresponds to the time required for half of the following to decay (b) Kalapakkam (b) direct cycle of coolant system (e) many-fold neutrons. (e) none of the above. In this reactor no moderator is used. (c) at an equal rate of the consumption (d) are unmoderated A fast breeder reactor uses following as fuel (a) increased production of neutrons (c) has no moderator In objective to improve the knowledge of fluid-structure interaction phenomena of dynamic issues in a SFR core, especially focused on damping, this Ph.D. thesis have been conducted in experimental, numerical and analytical approaches based on free-vibration experiments on mono-assembly test facility PISE-1A and multi-assembly test facility PISE-2C. (e) none of the above. (c) the molecules rearrange themselves to form other molecules in March and November 1984, and in September 1988. was considered not to constitute an immediate safety issue, The ﬁrst cladding failure was detected in May 1979. This chapter highlights a few technical and organizational areas that still present unsolved issues or exhibit room for improvement. The article will investigate the possibility of a nuclear revival in this country by first analyzing the troubled history of the light water reactor, a technology that dates back to the 1950s, and one the federal government choose to pursue to ensure America’s technological leadership, and one the nuclear manufactures heavily promoted to ensure profitability. 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