1 edition of Optimized core design and fuel management of a pebble-bed type nuclear reactor found in the catalog.
Optimized core design and fuel management of a pebble-bed type nuclear reactor
|LC Classifications||TK9360 .B64 2008|
|The Physical Object|
|Pagination||viii, 153 p. :|
|Number of Pages||153|
|LC Control Number||2009419147|
transport phenomena in the dynamic core of nuclear pebble-bed reactors pose extreme challenges to the safe design and efficient operation of these packed pebble-bed reactors. The main objectives of the present work are advancing the knowledge of the coolant gas dispersion and extent of mixing and the convective heat transfer coefficients. POSSIBILITY OF THE DESIGN OF A HIGH-FLUX PEBBLE-BED RESEARCH REACTOR WITH SMALL FUEL SPHERES S. SIKORIN, P. ANANICH, V. KAZAZYAN The Joint Institute for Power and Nuclear Research – Sosny, National Academy of Sciences of Belarus, Minsk, Republic of Belarus Abstract Research reactors are an integral part of a science and engineering. As a consequence, the fuel temperatures are elevated due to the reduced heat transfer of the coolant. However, the power profile and pebble size in a radially cooled pebble bed reactor can be optimized to achieve lower fuel temperatures than current axially cooled designs, while the Author: B. Boer, J. L. Kloosterman, D. Lathouwers, T. H. J. J. van der Hagen, H. van Dam.
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Optimized Core Design and Fuel Management of a Pebble-Bed Type Nuclear Reactor Proefschrift ter verkrijging van de graad van doctor aan de Technische Universtiteit Delft, op gezag van de Rector Magniﬁcus Prof.
J.T. Fokkema, voorzitter van het College van Promoties, in het openbaar te verdedigen op dinsdag 20 januari om uur door. Fuel management optimization for pebble-bed reactors Fuel management in pebble-bed reactors -- Determination of the equilibrium core composition and power profile -- Advanced Core Design And Fuel Management For Pebble-Bed Reactors Hans D.
Gougar Abderrafi M. Ougouag William K. Terry October Idaho National Engineering and Environmental Laboratory Idaho Falls, Idaho Prepared for the U.S. Department of Energy Office of Nuclear Science and Engineering Under DOE Idaho Operations Office.
The pebble-bed reactor (PBR) is a design for a graphite-moderated, gas-cooled nuclear is a type of very-high-temperature reactor (VHTR), one of the six classes of nuclear reactors in the Generation IV basic design of pebble-bed reactors features spherical fuel elements called pebbles.
These tennis ball-sized pebbles are made of pyrolytic graphite (which acts as the. Pebble Bed Reactors offer a future for new nuclear energy plants. They are small, modular, inherently safe, flexible in design and operation, use a demonstrated nuclear technology and can be competitive with fossil fuels.
Pebble bed reactors are helium cooled reactors that use small tennis ball size fuel balls. a b s t r a c t A reduction of the power peak in the core of High Temperature pebble-bed reactors is attractive to decrease the maximum fuel temperature and to increase fuel performance.
More specifically, the (pebble-bed type) High Temperature Reactor (HTR) is known for its inherently safe characteristics, coming from a negative temperature reactivity feedback, a low power density and a large thermal inertia of the core.
Optimized Core Design and Fuel Management of a Pebble-Bed Type Nuclear Reactor deals with the pebble-bed. The pebble bed reactor is being touted as nearly "accident proof." It is being hailed as the savior of the nuclear industry. Three Mile Island Alert opposes this reactor design because of its inherent dangerous safety defects.
It has no containment building. It uses flammable graphite as a moderator. The Pebble Bed Modular Reactor (PBMR) is a particular design of pebble bed reactor under development by South African company PBMR (Pty) Ltd since The project entails the construction of a demonstration power plant at Koeberg near Cape Town (now postponed indefinitely) and a fuel plant at Pelindaba near Pretoria.
1 Reactor arters: Centurion, Gauteng, South Africa. The PEBBED pebble bed reactor fuel management code under development at the Idaho National Laboratory is designed for rapid design and analysis of pebble bed high temperature reactors (PBRs).
Embedded within the code are the THERMIX-KONVEK thermal fluid solver and the COMBINE-7 spectrum generation code for inline cross section ing System: MLTPL. Pebble bed reactor scheme. I think there’s a window of opportunity still there.
In some way initiated by the former PBMR project in South Africa, many studies have looked into small nuclear reactors, and they conclude that power generation reactors of MW or so could be commercially viable – which no one had thought previously possible.
Our work is meant to turn that belief around with substantive analysis. If successful, propose building a reactor research facility to license by test, explore different fuel cycles, process heat applications, and advanced control system design, helium gas turbines and other components.
(Within five years!). Journal Article: Automated Design and Optimization of Pebble-bed Reactor Cores Title: Automated Design and Optimization of Pebble-bed Reactor Cores Full Record.
X-energy’s Xe high temperature gas-cooled pebble bed modular nuclear power plant has higher efficiencies, a reduced water requirement, a.
Pebble-bed Reactor Core Neutronics Design and Fuel Cycle Frederik Reitsma Oct• The pebble bed reactor technology’s fuel – and an optimized core design with a flatter power profile and lower peaking factors. Unloaded fuel elements.
The Pebble Bed Modular Reactor (PBMR), like most new reactor ideas, is a reincarnation of an old reactor idea. In this case the old idea is the “high temperature gas reactor” or HTGR, that then was proposed in a modular version, known as the MHTGR.
The PBMR is a variant of the HTGR. The Pebble Bed Modular Reactor (PBMR) is a new type of high temperature helium gas-cooled nuclear reactor, which builds and advances on world-wide nuclear operators' experience of older reactor. Like all nuclear reactor fuel, pebbles are only slightly radioactive before irradiation (U has an extremely long half-life), and very radioactive after due to the buildup of fission products.
"Draining the core" in order to stop the nuclear reaction is not necessary in a PBR, as the core is made of high temperature materials. focusses on the Pebble-Bed Modular Reactor (PBMR), which is a nuclear reactor design based on the pebble-bed type, of the generation IV initiative, with as major advantages passive safety and online refuelling.
In this reactor the fuel is contained in pebbles, which form a randomly packed bed through which helium coolant Size: KB. 1 Pebble Bed Reactor Fuel Cycle Optimization using Particle Swarm Algorithm Barak Tavron1, Eugene Shwageraus2 Planning, Development and Technology(1) Division, Israel Electric Corporation Ltd., P.O.
HaifaIsrael (2) Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK ABSTRACT.
In an improved pebble bed design with ten pebble in-core recycling steps and three radial fuel zones, the maximum fuel temperature during normal operation and during a DLOFC transient is reduced by 80 °C and °C, respectively, as compared to the reference design with six pebble passes and one by: PBR fuel management includes the decisions on loading, discharging, storing, repossessing and disposal of fuel pebbles.
The on-line refueling feature of PBR fuel management may be considered as part of the reactor control operations since whenever core reactivity drops, reactive fuel pebbles (fresh or partly burned) are inserted to maintain by: 1.
Optimization of a Radially Cooled Pebble Bed Reactor Article in Nuclear Engineering and Design (10) October with 86 Reads How we measure 'reads'. The reference core design is presented in Section 3. This design is for a long-life core, which intuitively should result in the minimum amount of TRU being sent to the repository, for a given core size.
The results of the sensitivity study on various fuel management schemes are presented in Section 4. TypicalAuthor: E. Hoffman, T. Taiwo, W.
Yang, M. Fatone. SA’s Pebble Bed Modular Reactor. Then, as design philosophy matured, various teams around the world said: “Why don’t we start from scratch, and design a reactor which has no hereditary link to submarine reactors.” In South Africa, a great team did just that, and designed a high tech reactor that did not need large amounts of water.
First, the area required to store pebble fuel is less than the area required to store light water reactor spent fuel. Second, graphite has excellent characteristics as a waste form.
The waste form of the spent pebble fuel is more robust and will perform better than light water reactor fuel at the United States repository at Yucca : Paul E.
Owen. Like its pebble-bed rival, the GT-MHR is a helium-cooled reactor using ceramic-coated fuel, but in a block formation. The fuel blocks, each about meter tall, are stacked 10 blocks high in Author: Jenny Weil.
fuel cycles in the pebble bed reactor with the conversion of thorium into U as the main interest. Teuchert and Rütten investigated pebble bed reactors with a maximum discharge rate of U (CR=) and a near breeder pebble bed reactor (CR=). The first reactor type can be used to supply the make-up fuel of over 10 near breeder.
Quadruple: reactor core design B4, stacked in a double layer, with one reactor missing (so a total of seven pebble bed reactor core blocks), heat exchanger design A2, four turbines. The parts of this setup match up nicely, everything is almost at full capacity with the turbines running at about 97%.
* A Pebble Bed Reactor contains a reactor core made of steel, the walls are lined with graphite bricks, to control heat transfer. The core holdspebbles,are.
Jet Fuel VS Diesel VS Gasoline how they burn and what color are they. - Duration: Just Think Recommended for you. U.S. NRC, "Meeting with Exelon Generation Company, DOE and Other Interested Stakeholders Regarding the Pebble Bed Modular Reactor," Memorandum from T.
King to A. Thadani, JAttachment 5-b; International Atomic Energy Agency, Fuel Performance and Fission Product Behavior In Gas-Cooled Reactors, IAEA-TECDOC, Nov. p. X-energy is a nuclear reactor & fuel design engineering company.
We are developing Generation IV high-temperature gas cooled nuclear reactors & the TRISO-X fuel to power them. X-energy yesterday announced the start of work on the conceptual design of its Xe high temperature gas-cooled pebble bed modular reactor, following a review of the company’s readiness by an external panel of industry experts.
Maryland-based Xenergy’s has a panel of industry experts from Southern Nuclear, Burns and McDonnell and Technology Insights. design of the MHTGR [17,18]. The pebble-bed type HTR. In this reactor the coated particles are loaded in spherical graphite elements the size of a tennis ball, ﬁgure Such a pebble typically contains ten- to twenty thousand coated particles bedded in a graphite matrix of 5 cm diameter.
This fuel zone is protected by a layer of graphite. A nuclear reactor core is the portion of a nuclear reactor containing the nuclear fuel components where the nuclear reactions take place and the heat is generated.
Typically, the fuel will be low-enriched uranium contained in thousands of individual fuel pins. The core also contains structural components, the means to both moderate the neutrons and control the reaction, and the means to.
David Lochbaum, nuclear safety engineer for the Union of Concerned Scientists (UCS), says that the pebble bed reactor uses blocks of graphite to slow neutron action, although "graphite is a form of carbon, which can ignite in a reactor fire.
The liquid fluoride thorium reactor is another advanced nuclear power source, even more promising than the pebble bed reactor. The LFTR uses inexpensive thorium as a fuel, transforming it to uranium which fissions, producing heat and electric power at a cost less than that from coal power plants.
th (about 50 W/cc) and uses the pebble fuel type. Each pebble consists of a spherical container (pebble) made of matrix material that contains a central zone of coated or particulate fuel dispersed in the matrix material.
Since the graphite used as matrix material in the Pebble-Bed Modular Reactor (PBMR) design might not be appropriate for the fastAuthor: E.
Hoffman, T. Taiwo, W. Yang, M. Fatone. Abstract: This invention relates to a nuclear power plant (10) having a nuclear reactor (11) of the pebble bed type, making use of spherical fuel and/or moderator elements, and an element handling system (20) having at least one sphere flow path (22) along which spheres are conveyed under the influence of a fluid stream.
More particularly, the. The molten salt reactor is an advanced design in which the nuclear fuel is dissolved in the coolant itself, typically a molten fluoride salt mixture. MSRs can run at higher temperatures and higher Author: Eric Wesoff.
I am not sure why the Pebble Bed modular reactor (PBMR) is being touted as the great solution to problems with nuclear power.
It uses a once through, virtually non-reprocessible fuel. It produces a high volume of waste consisting not only of the fuel but the casing/moderator which has about 50 times the volume of the fuel and 20 times its mass.Pub.
date June Author Van Grinsven, J.H.M. Price US$79 / €55 ISBN print Subject Engineering, Management Science.