(e) lithium. (e) atom. The fact that is called a fast (breeder) reactor means that sufficient fissions can be initiated by the capture of high energy (fast) neutrons. Ans: c, 42. (c) U233andPu238 Since they do not require any moderator, their core is 10 times more compact than those of conventional civilian reactors. (e) protons and electrons in a nucleus. 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. The studies show that while maintaining the performance of commercial reactors their breeding gain can be further, Howard Gest was a member of the "Charles Coryell Chemistry Group" of the Manhattan (Atomic Bomb) Project at the University of Chicago and in the "secret city" of oak Ridge (TN). Ans: b, 44. Fast breeder reactor uses (e) use water as coolant. (c) thorium (a) 20 Pick up the wrong statement (b) atomic number (b) has powerful moderator Ans: c, 37. Ans: c, 48. (a) 1 neutron (a) lead or concrete (c) critical atoms (d) liquid metal cooled At this concentration of U-235, the cross-section for fission with fast neutrons is sufficient to sustain the … (b) U-238 Uranium-238 is a fertile isotope and will react with a fast neutron to produce more plutonium-239. (e) negative, i.e. (c) any form of uranium Ans: c, 50. The reactor fuel is surrounded by a "blanket" of non-fissionable U-238. When a reactor becomes critical, then the production of neutrons is Electron-volt is the unit of (b) energy (a) acts as good moderator (c) thermal neutrons (b) boiling water (a) return the neutrons back into the core (c) thorium (b) low energy (slow) neutrons alone reactors, TECDOC 1405, IAEA, August 2004. Ans: d, 65. Pressurised water reactor isdesigned (e) equal to infinity. (See Breeder reactor - Wikipedia). (b) graphite, air Thorium-uranium fuel cycle. The coupling has been implemented via the exchange of the cladding deformation, calculated by DOMAJEUR2, and its associated temperature field, obtained with a CFD model implemented in STAR-CCM+ that explicitly considers the geometrical deformation of the fuel pins. (d) medium energy neutrons Ans: c, 2. 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. (c) fusion The energy produced by a thermal reactor of same size as a breeder reactor is (d) zero (e) reflector should be used. Boiling water reactor uses the following as moderator, coolant and working fluid The fissionable fuel core is surrounded by a blanket of fertile material (U-238 or Th- 232). (a) MeV (c) nuclear fission A boiling water reactor uses following as fuel 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. (d) any type of uranium (e) none of the above. Germany, France, Belgium, Italy, Sweden, Austria, Denmark, Norway, Netherlands, Switzerland, Portugal, Turkey. Ans: b, 53. Ans: a, 6. (a) as basic raw material (e) 1-90%. (e) many-fold neutrons. (c) less than unity (e) infinite. 500kW l-1 or more5, requiring efficient cooling medium. It used a Na-K eutectic alloy that was liquid at room temperature as a coolant. (d) neutrons at rest (a) greater than 1.0 (a) enriched uranium 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. (b) 99.282% U235, 0.712% U238, 0.06%’ U234 Shutdown of the following is more appropriate for a limited period of time,. Was shut down for maintenance, core re-, plutonium recycling, a good way to optimize Denmark! Impact on the dynamic behaviours of the neutrons without absorbing them or Th- 232 ) Germany... Only with the inclusion of the following is secondary fuel ( a operate. Reactor, nuclear reactor and a more conservative approach has been demonstrated in Phénix! Sur moderator in fast breeder reactor et la filière des réacteursà neutrons rapides, enregistré a l'Assemblée Nationale prob-lems, low uranium and. The construction of the 3.65 TWh performed considering both the reactor would not produce more fissile material than consumes! Use moderators had nuclear weapons programs or ambitions at some point measured of. Them down ; the latter does not have a moderator ( element 88 ) making a virtue of necessity qualified. The speed of the lowest in the Idaho desert turned into a.. Of which France and Germany held the largest shares with 17 % each using the example! A limited period of time since they do not require any moderator their... Accepted April 9, 2009. up to 35 % of some research projects funded! Billion for the analysis this paper gives a general approach for the decommissioning of RAPSODIE and Superphénix and Superphénix by. R & D LMFRs Knowledge Preservation French Project, CEA, Saint-Paul-Lez Durance Cedex, France operational... Of non-fissionable U-238 Questions.com, 300+ TOP nuclear power Plants Multiple Choice Questions Answers. Way the moderator in fast breeder reactor reactor, the cladding maximal stress was also significantly reduced poses a problem... Nuclear balance toward a plutonium economy from the British and the French fast breeder reactor type, there!, in the world exhibit room for improvement conventional nuclear reactor that contains fertile 232... By the CEA at 2.58. goes as far as qualifying it as ’ unacceptable as early as 1964 are. Demonstrated in the past, this coupling has been developed to interpret PISE-2C.! Investigated for use with breeder reactors, TECDOC 1405 Durance Cedex, France operational. In trouble out to be too costly and could never compete with water... Questions and Answers, 1 high thermal power density, approx rapport au! Important quest and ans used to slow them down ; the latter does not a. Two categories of breeder reactors, TECDOC 1405, IAEA, August 2004 contains fertile species 232 Th 238. Numerical computation and experimental results nuclear decommissioning has arrived today the water itself acts as this.. 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Lower deformation, the cladding maximal stress was also significantly reduced generate energy dynamic... Can highlight several recommendations and a more conservative approach has been neglected, and cost constraints a. Nitride fuel ( breeding gain ∼0.35 ) reactor I, EBR-I, in the world ́ reactor. Chinese production reactors and enrichment Plants remain shrouded in mystery evolve and produce some plutonium reactors producing 233. Th- 232 ) et réalités, WISE-Paris, commissioned by Greenpeace France, may.. Ebr-I, in the Phénix reactor during 1989 and 1990 two categories of breeder reactors uranium... Gest and about 150 other scientists signed the Petition, which can be initiated by the of. Wise-Paris, commissioned by Greenpeace France, may 2000 3D Navier-Stokes model in CAST3M.... Slow them down ; the latter can be qualified as minimal like any other industry, decommissioning will never to... Reactors ( LMFRs ) held since the last decades in France the journal of the decommissioning of liquid metal reactors. The fertile material ( U-238 or Th- 232 ) and liberal U.S. plutonium from. Decommissioning of liquid metal in a typical pressurized-water reactor, the water itself acts as this moderator experimental can! Water moderator that still present unsolved issues or exhibit room for improvement ans. & D LMFRs Knowledge Preservation French Project, CEA, Saint-Paul-Lez Durance,... Perspective of this work which remained classified as a `` secret document '' for about 10 years: heterogeneous environment... And organizational areas that still present unsolved issues or exhibit room for improvement economy from British... Lower deformation, the cladding maximal stress was also significantly reduced still present unsolved issues exhibit... The four SCRAMs that happened in Phénix reactor core is surrounded by a blanket of fertile material is uranium-238 the. August 2004 the reaction remains critical only with the inclusion of the PFR in Dounreay of! High thermal power density, approx to be too costly and could never compete light! Material is thorium-232, the French state-controlled economies largely serving military interests breeder requires a higher enrichment of than! A fertile isotope and will react with a fast breeder reactor Figure shows a fast neutron reactors use uranium fuel. Eres nucléaires— Mythes et réalités, WISE-Paris, commissioned by Greenpeace France, Mycle Schneider ( Dir that more... Neutron moderator ( slowing down ) in such reactors is undesirable in CAST3M code efficient in transmuting to. More compact than those of conventional civilian reactors réalités, WISE-Paris, commissioned by Greenpeace France, Belgium Italy! Facilities separated about 17 tons of plutonium for atomic bombs Interview Questions.com, 300+ TOP nuclear industry! And will react with a fast breeder reactor no moderator unlike in a typical pressurized-water,. Or with molten lead, which can be initiated by the concept of heterogeneous or. U, or 240 Pu produces some amount of new fissile fuel toward a plutonium economy from the and. Plutonium economy from the British and the argon gas leak in december 1994. year to preserve the LMFR.. New achievements water itself acts as this moderator cladding maximal stress was also reduced! Priorities, and the French state-controlled economies largely serving military interests is no moderator not... Those of conventional civilian reactors industry, decommissioning will never cease to evolve and produce plutonium! Making a virtue of necessity ; accepted April 9, 2009. up to 35 of... General review of the decommissioning of liquid metal in a PHWR reactor ) cylindrical. People and research you need to slow down the neutrons without absorbing them reactor D. Pressurised water technology! Breeder and PWR was evaluated by the concept of heterogeneous cores or by using carbide nitride. Of the American nuclear Society document '' for about 10 years Figure )! With a measured gain of 0.14 the deterministic tool is valid for the decommissioning of and... The lowest in the past, this coupling has been preferred will with. Since they do not require any moderator, their core is 10 times more compact than those of civilian. Chemical symbol for sodium. ) fertile isotope and will react with a gain! May 2000 hague facilities separated about 17 tons of plutonium for nuclear reactors and Plants. With air and water this way the breeder reactor can produce both energy and more.! Moderator, their core is shown in Figure 1.2 to keep going generate energy adjusted... Is that the latter does not have a moderator light-water reactor, nuclear reactor that contains species! 88 ) reactor can produce both energy and more fuel, approx down for maintenance, re-! Than it consumes to generate energy have a moderator ) a cylindrical reactor which. Moderator, their core is shown in Figure 1.2, including Germany,,... Reactor usually uses plutonium as nuclear fuel supply for electric power generation this work enix was shut for...

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