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Scoping Analysis Of The Advanced Test Reactor Using Sn2nd
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Book Synopsis Scoping Analysis of the Advanced Test Reactor Using SN2ND. by :
Download or read book Scoping Analysis of the Advanced Test Reactor Using SN2ND. written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed set of calculations was carried out for the Advanced Test Reactor (ATR) using the SN2ND solver of the UNIC code which is part of the SHARP multi-physics code being developed under the Nuclear Energy Advanced Modeling and Simulation (NEAMS) program in DOE-NE. The primary motivation of this work is to assess whether high fidelity deterministic transport codes can tackle coupled dynamics simulations of the ATR. The successful use of such codes in a coupled dynamics simulation can impact what experiments are performed and what power levels are permitted during those experiments at the ATR. The advantages of the SN2ND solver over comparable neutronics tools are its superior parallel performance and demonstrated accuracy on large scale homogeneous and heterogeneous reactor geometries. However, it should be noted that virtually no effort from this project was spent constructing a proper cross section generation methodology for the ATR usable in the SN2ND solver. While attempts were made to use cross section data derived from SCALE, the minimal number of compositional cross section sets were generated to be consistent with the reference Monte Carlo input specification. The accuracy of any deterministic transport solver is impacted by such an approach and clearly it causes substantial errors in this work. The reasoning behind this decision is justified given the overall funding dedicated to the task (two months) and the real focus of the work: can modern deterministic tools actually treat complex facilities like the ATR with heterogeneous geometry modeling. SN2ND has been demonstrated to solve problems with upwards of one trillion degrees of freedom which translates to tens of millions of finite elements, hundreds of angles, and hundreds of energy groups, resulting in a very high-fidelity model of the system unachievable by most deterministic transport codes today. A space-angle convergence study was conducted to determine the meshing and angular cubature requirements for the ATR, and also to demonstrate the feasibility of performing this analysis with a deterministic transport code capable of modeling heterogeneous geometries. The work performed indicates that a minimum of 260,000 linear finite elements combined with a L3T11 cubature (96 angles on the sphere) is required for both eigenvalue and flux convergence of the ATR. A critical finding was that the fuel meat and water channels must each be meshed with at least 3 'radial zones' for accurate flux convergence. A small number of 3D calculations were also performed to show axial mesh and eigenvalue convergence for a full core problem. Finally, a brief analysis was performed with different cross sections sets generated from DRAGON and SCALE, and the findings show that more effort will be required to improve the multigroup cross section generation process. The total number of degrees of freedom for a converged 27 group, 2D ATR problem is ≈340 million. This number increases to ≈25 billion for a 3D ATR problem. This scoping study shows that both 2D and 3D calculations are well within the capabilities of the current SN2ND solver, given the availability of a large-scale computing center such as BlueGene/P. However, dynamics calculations are not realistic without the implementation of improvements in the solver.
Book Synopsis Analysis of Fast Reactor Filter Spectra in the Advanced Test Reactor and Neutron Spectral Measurement at Idaho Accelerator Center by : Jyothier Kumar Nimmagadda
Download or read book Analysis of Fast Reactor Filter Spectra in the Advanced Test Reactor and Neutron Spectral Measurement at Idaho Accelerator Center written by Jyothier Kumar Nimmagadda and published by . This book was released on 2012 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the project MANTRA is to obtain important integral information on the cross sections for actinides in reasonable short periods of time through a novel approach. The novelty of this project mainly depends on using the facility Accelerator Mass Spectroscopy (AMS) at Argonne National Laboratory (ANL) which is known for providing very precise measurements of various actinides that were built up during the irradiation process. The irradiation process for MANTRA is carried out in the Advanced Test Reactor (ATR) at the Idaho National Laboratory (INL). The initial requirement of this project was the selection of neutron flux wire monitors by considering the neutron spectrum generated in a special test location at the ATR will be a close representative to that of a Fast Neutron Reactor (FNR). This fast spectrum can be achieved by using different filters to get rid of thermal and epithermal neutrons. The flux wire monitors were selected by considering the fluxes for each filter, a year wait time, one irradiation cycle (55 days), the expected activity after a year wait time to be 500 Bq and 1000 Bq and by following the American Society for Testing and Materials (ASTM) standards. The neutron spectra for these flux wire monitors inside the capsules used for MANTRA were determined using the Monte Carlo simulation code. An experiment was carried out at the Idaho Accelerator Center (IAC) with sample materials including some of the neutron flux wires short listed for MANTRA. The 44 MeV Short Pulse Linear Accelerator (LINAC) at the IAC was used to irradiate the sample wires enclosed inside the cutoff materials and 47 gold foils placed in between Poly Methyl Methacrylate (PMMA) sheets. An unfolding package UMG 3.3 was used to reconstruct the neutron spectrum using the activities measured from these irradiated samples at JAC (1).
Book Synopsis Nuclear Reactor Theory by : George I. Bell
Download or read book Nuclear Reactor Theory written by George I. Bell and published by . This book was released on 1970 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a part of North Africa where, within miles, the backdrop can change dramatically from snow-blasted mountains to wind-scoured dunes live the Berber people of the Atlas Mountains. In the third book of her trilogy on African women, world-renowned photojournalist Margaret Courtney-Clarke examines the difficult lives and remarkable arts of Berber women. As modern times and modern warfare in Algeria, Morocco, and Tunisia have encroached on their centuries-old traditions, Berber women have begun to give up the old ways. Imazighen: The Vanishing Traditions of Berber Women is a record of a quickly disappearing way of life. As in her earlier books, Ndebele: The Art of an African Tribe and African Canvas: The Art of West African Women, Courtney-Clarke succeeds in capturing the spirit of the women by experiencing their world from season to season and by respecting their values and traditions. Through photographs, interviews, and observations, Courtney-Clarke documents the Berber women as they stoically carry water and firewood on their backs for miles of rocky terrain. And she records the beauty they have magically produced in their lives - through their spinning and weaving and their carefully coiled pottery - a metaphor for survival and creativity. Geraldine Brooks, award-winning journalist and an expert on life in the Middle East, accompanied Courtney-Clarke on her last trip to North Africa, and has written moving, thoughtful essays on the struggle of existence among the Berbers. With a glossary of Berber terms and a detailed map of the region, this book is not only a handsomely illustrated volume of the triumph of the arts of the Berber women, but a dramatic record of a people yielding to the pressures of the twentieth century.
Book Synopsis Fast Spectrum Reactors by : Alan E. Waltar
Download or read book Fast Spectrum Reactors written by Alan E. Waltar and published by Springer Science & Business Media. This book was released on 2011-09-28 with total page 717 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a complete update of the classic 1981 FAST BREEDER REACTORS textbook authored by Alan E. Waltar and Albert B. Reynolds, which , along with the Russian translation, served as a major reference book for fast reactors systems. Major updates include transmutation physics (a key technology to substantially ameliorate issues associated with the storage of high-level nuclear waste ), advances in fuels and materials technology (including metal fuels and cladding materials capable of high-temperature and high burnup), and new approaches to reactor safety (including passive safety technology), New chapters on gas-cooled and lead-cooled fast spectrum reactors are also included. Key international experts contributing to the text include Chaim Braun, (Stanford University) Ronald Omberg, (Pacific Northwest National Laboratory, Massimo Salvatores (CEA, France), Baldev Raj, (Indira Gandhi Center for Atomic Research, India) , John Sackett (Argonne National Laboratory), Kevan Weaver, (TerraPower Corporation) ,James Seinicki(Argonne National Laboratory). Russell Stachowski (General Electric), Toshikazu Takeda (University of Fukui, Japan), and Yoshitaka Chikazawa (Japan Atomic Energy Agency).
Book Synopsis A Half-century of Automata Theory by : Arto Salomaa
Download or read book A Half-century of Automata Theory written by Arto Salomaa and published by World Scientific. This book was released on 2001 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Eleven pioneers in the field reminisce about the development of automata theory and suggest possible future directions for the field, in these seven papers from a July 2000 symposium held at the University of Western Ontario, Canada. Specific topics include hazard algebras, undecidability and incompleteness results in automata theory, playing infinite games in finite time, gene assembly in ciliates, and compositions over a finite domain. This work lacks a subject index. Salomaa is affiliated with the Turku Center for Computer Science, Finland. Annotation c. Book News, Inc., Portland, OR (booknews.com).
Book Synopsis Modern Applications Of Automata Theory by : Priti Shankar
Download or read book Modern Applications Of Automata Theory written by Priti Shankar and published by World Scientific. This book was released on 2012-05-24 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: Automata theory has come into prominence in recent years with a plethora of applications in fields ranging from verification to XML processing and file compression. In fact, the 2007 Turing Award was awarded to Clarke, Emerson and Sifakis for their pioneering work on model-checking techniques. To the best of our knowledge, there is no single book that covers the vast range of applications of automata theory targeted at a mature student audience. This book is intended to fill that gap and can be used as an intermediate-level textbook. It begins with a detailed treatment of foundational material not normally covered in a beginner's course in automata theory, and then rapidly moves on to applications. The book is largely devoted to verification and model checking, and contains material that is at the cutting edge of verification technology. It will be an invaluable reference for software practitioners working in this area.
Book Synopsis Ram-based Neural Networks by : James Austin
Download or read book Ram-based Neural Networks written by James Austin and published by World Scientific. This book was released on 1998-02-10 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: RAM-based networks are a class of methods for building pattern recognition systems. Unlike other neural network methods, they train very rapidly and can be implemented in simple hardware. This important book presents an overview of the subject and the latest work by a number of researchers in the field of RAM-based networks.
Book Synopsis The Nuclear Fuel Cycle by : Nicholas Tsoulfanidis
Download or read book The Nuclear Fuel Cycle written by Nicholas Tsoulfanidis and published by . This book was released on 2013 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Defects in Insulating Materials by : G.E. Matthews
Download or read book Defects in Insulating Materials written by G.E. Matthews and published by Trans Tech Publications Ltd. This book was released on 1997-01-14 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes a comprehensive international forum on defect-related phenomena in wide-gap materials, crystalline or otherwise. Materials as diverse as SiO2, group-III nitride compounds, diamond, alkali halides, refractory oxides, and polymers are covered, and the "defects" considered include intrinsic point imperfections, dislocations, accidental impurities, intentional dopants, imperfect surfaces, nanocrystals in host matrices, and bonding defects in glasses. Important unifying similarities of the phenomena are identified and investigative methods are presented which can be applied, almost across-the-board, to materials which share a wide transparency, deep traps, extensive stored energy in electron-hole pairs, and a low conduction-electron density.
Book Synopsis Network Grammars by : Summer Institute of Linguistics
Download or read book Network Grammars written by Summer Institute of Linguistics and published by . This book was released on 1975 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Formal and Practical Aspects of Autonomic Computing and Networking: Specification, Development, and Verification by : Cong-Vinh, Phan
Download or read book Formal and Practical Aspects of Autonomic Computing and Networking: Specification, Development, and Verification written by Cong-Vinh, Phan and published by IGI Global. This book was released on 2011-10-31 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Autonomic computing and networking (ACN), a concept inspired by the human autonomic system, is a priority research area and a booming new paradigm in the field. Formal and Practical Aspects of Autonomic Computing and Networking: Specification, Development, and Verification outlines the characteristics, novel approaches of specification, refinement, programming and verification associated with ACN. The goal of ACN and the topics covered in this work include making networks and computers more self-organized, self- configured, self-healing, self-optimizing, self-protecting, and more. This book helpfully details the steps necessary towards realizing computer and network autonomy and its implications.
