Modeling Radionuclide Transport in Clays

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Modeling Radionuclide Transport in Clays by :

Download or read book Modeling Radionuclide Transport in Clays written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Migration Case Study

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (111 download)

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Book Synopsis Migration Case Study by : European Communities

Download or read book Migration Case Study written by European Communities and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Trancom-II project addresses the migration behaviour of radionuclides, identified as important for long-term safety (Se, U, Pu, Am as analogue for trivalent Pu), in a reducing clay environment, with special emphasis on the role of the natural organic matter (NOM). The main questions are whether the NOM increases the radionuclide concentration in a solution due to complexation/colloid formation and what the possible role of mobile NOM is as radionuclide carrier. The objective is to develop and/or demonstrate a conceptual model, for the description of the migration of these radionuclides, that can be implemented in performance assessment (PA) models. The experimental programme revealed that, in general, the transport mechanism of the studied radionuclide species (except for , SeO42-) is dominated by an immobilisation process combined with a constant release of a low concentration of the radionuclide. ln the case of Se and U the constant release is controlled by a solubility limit of the precipitated phases and the transport is independent of the NOM. Colloids were in most cases in evidence but found to be either unstable in, or filtered by, the Boom Clay. Despite the strong complexation of Am with the NOM, these mobile complexes are unstable in the Boom Clay and followed by a constant release of Am at a concentration lower than its solubility. The transport of this released Am fraction is, however, correlated with the NOM. For Pu the underlying processes are not understood but resemble those of Am. A transport model, Popcorn, was developed to describe and evaluate the influence of the NOM on radionuclide transport in clay. It accounts for attachment/detachment rates of the NOM to clay surfaces and the kinetics of radionuclides complexation to, and dissociation from, the NOM. The model described well the Am-OM transport behaviour and offers potential means of extrapolating parameter values for application of the model on a larger space scale. The general conceptual model was handled by PA using a limited set of parameters: concentration limit or solubility limit, diffusion coefficient, retardation, diffusion accessible porosity. The NOM in the Boom Clay has an influence on the migration behaviour but it does not lead to an increased radionuclide flux to the biosphere.

Multiple Roles of Clays in Radioactive Waste Confinement

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Publisher : Geological Society of London
ISBN 13 : 1786204045
Total Pages : 364 pages
Book Rating : 4.7/5 (862 download)

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Book Synopsis Multiple Roles of Clays in Radioactive Waste Confinement by : S. Norris

Download or read book Multiple Roles of Clays in Radioactive Waste Confinement written by S. Norris and published by Geological Society of London. This book was released on 2019-08-05 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Publication highlights the importance of clays and clayey material, and their multiple roles, in many national geological disposal facilities for higher activity radioactive wastes. Clays can be both the disposal facility host rock and part of its intrinsic engineered barriers, and may be present in the surrounding geological environment. Clays possess various characteristics that make them high-quality barriers to the migration of radionuclides and chemical contaminants, e.g. very little water movement, diffusive transport, retention capacity, self-sealing capacity, stability over millions of years, homogeneity and lateral continuity.

Confidence in Models of Radionuclide Transport for Site-specific Assessments

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Publisher : OECD Publishing
ISBN 13 :
Total Pages : 324 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Confidence in Models of Radionuclide Transport for Site-specific Assessments by : NEA Project on Radionuclide Migration in Geologic, Heterogeneous Media

Download or read book Confidence in Models of Radionuclide Transport for Site-specific Assessments written by NEA Project on Radionuclide Migration in Geologic, Heterogeneous Media and published by OECD Publishing. This book was released on 2001 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: ThIS fourth GEOTRAP workshop, Confidence in Models of Radionuclide Transport for Site-specific Performance Assessment held in June 1999, addressed the issue of technical confidence building and provided an overview of current developments in this field.

Modelling of Radionuclide Migration and Heat Transport from an HLW-repository in Boom Clay

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (111 download)

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Book Synopsis Modelling of Radionuclide Migration and Heat Transport from an HLW-repository in Boom Clay by :

Download or read book Modelling of Radionuclide Migration and Heat Transport from an HLW-repository in Boom Clay written by and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Critical Review

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ISBN 13 :
Total Pages : 528 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Critical Review by : Yasuo Onishi

Download or read book Critical Review written by Yasuo Onishi and published by . This book was released on 1981 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Clays in Natural and Engineered Barriers for Radioactive Waste Confinement

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Publisher : Geological Society of London
ISBN 13 : 186239654X
Total Pages : 618 pages
Book Rating : 4.8/5 (623 download)

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Book Synopsis Clays in Natural and Engineered Barriers for Radioactive Waste Confinement by : S. Norris

Download or read book Clays in Natural and Engineered Barriers for Radioactive Waste Confinement written by S. Norris and published by Geological Society of London. This book was released on 2014-10-24 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Publication contains 43 scientific studies presented at the 5th conference on ‘Clays in natural and engineered barriers for radioactive waste confinement’ held in Montpellier, France in 2012. The conference and this resulting volume cover all the aspects of clay characterization and behaviour considered at various temporal and spatial scales relevant to the confinement of radionuclides in clay, from basic phenomenological process descriptions to the global understanding of performance and safety at repository and geological scales. Special emphasis has been given to the modelling of processes occurring at the mineralogical level within the clay barriers. The papers in this Special Publication consider research into argillaceous media under the following topic areas: large-scale geological characterization; clay-based concept/large-scale experiments; hydrodynamical modelling; geochemistry; geomechanics; mass transfer/gas transfer; mass transfer mechanisms. The collection of different topics presented in this Special Publication demonstrates the diversity of geological repository research.

Modeling of Cation Binding in Hydrated 2

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ISBN 13 :
Total Pages : 3 pages
Book Rating : 4.:/5 (683 download)

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Book Synopsis Modeling of Cation Binding in Hydrated 2 by :

Download or read book Modeling of Cation Binding in Hydrated 2 written by and published by . This book was released on 1998 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary focus of the research is the development of molecular theories of ion exchange on clay minerals, with a view toward understanding the mechanism of radionuclide transport through soils. The specific scientific goals of the study involve using molecular simulation methods to correlate clay-ion binding strengths with interlayer structure and swelling properties. This should build upon the fundamental understanding of clay behavior and allow for improvement in transport modeling of radionuclides in clay-rich soils.

Modelling of Radionuclide Migration and Heat Transport from Hlw-Repository in Boom Clay

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Publisher :
ISBN 13 : 9789282640623
Total Pages : 260 pages
Book Rating : 4.6/5 (46 download)

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Book Synopsis Modelling of Radionuclide Migration and Heat Transport from Hlw-Repository in Boom Clay by : M. Put

Download or read book Modelling of Radionuclide Migration and Heat Transport from Hlw-Repository in Boom Clay written by M. Put and published by . This book was released on 1992-12-01 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Subsurface Solute Transport Models and Case Histories

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Publisher : Springer Science & Business Media
ISBN 13 : 9400713061
Total Pages : 820 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Subsurface Solute Transport Models and Case Histories by : Vyacheslav G. Rumynin

Download or read book Subsurface Solute Transport Models and Case Histories written by Vyacheslav G. Rumynin and published by Springer Science & Business Media. This book was released on 2012-01-14 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book addresses the development of the basic knowledge of the subsurface solute transfer with a particular emphasis on field data collection and analysis coupled with modeling (analytical and numerical) tool application. The relevant theoretical developments are concerned mainly with the formulation and solution of deterministic mass-transport equations for a wide range of engineering issues in groundwater quality assessment and forecasting. The book gives many computational examples and case studies drawn from the conducted field investigations. The analyzed problems are as follows: investigation and prediction of groundwater contamination by industrial contaminants and solutions (radionuclides, chloride and nitrate brine) with special focus on the effect of (a) aquifer heterogeneity, anisotropy, and dual porosity, (b) density contrast existing between industrial waste and groundwater, or in density-stratified artesian and coastal groundwater systems; (c) physicochemical interactions that play a major role in retarding (e.g. adsorption) or enhancing (e.g. interactions between dissolved species and mobile colloids) contaminant transport; prediction of the effects of pumping on groundwater quality at wellfields; groundwater dating using stable and radioactive isotopes for prediction and assessment of contamination potential; field and laboratory tests’ design and analysis, and monitoring data interpretation; partitioning of surface and subsurface flows using isotope techniques. One of the most essential topics addressed in the book is the migration and fate of radionuclides. Model development is motivated by field data analysis from a number of radioactively contaminated sites in the Russian Federation: near-surface radioactive waste disposal sites and deep-well radioactive waste injection sites. They play a unique role in the advancement of knowledge of the subsurface behavior and fate of many hazardous radionuclides and can be considered as field-scale laboratories. Thus, the book, along with theoretical findings, contains field information, which will facilitate the understanding of subsurface solute transport and the development of a methodology for practical applications to groundwater hydrology.

Reactive Transport Modeling

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Publisher : John Wiley & Sons
ISBN 13 : 1119060028
Total Pages : 689 pages
Book Rating : 4.1/5 (19 download)

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Book Synopsis Reactive Transport Modeling by : Yitian Xiao

Download or read book Reactive Transport Modeling written by Yitian Xiao and published by John Wiley & Sons. This book was released on 2018-03-14 with total page 689 pages. Available in PDF, EPUB and Kindle. Book excerpt: Teaches the application of Reactive Transport Modeling (RTM) for subsurface systems in order to expedite the understanding of the behavior of complex geological systems This book lays out the basic principles and approaches of Reactive Transport Modeling (RTM) for surface and subsurface environments, presenting specific workflows and applications. The techniques discussed are being increasingly commonly used in a wide range of research fields, and the information provided covers fundamental theory, practical issues in running reactive transport models, and how to apply techniques in specific areas. The need for RTM in engineered facilities, such as nuclear waste repositories or CO2 storage sites, is ever increasing, because the prediction of the future evolution of these systems has become a legal obligation. With increasing recognition of the power of these approaches, and their widening adoption, comes responsibility to ensure appropriate application of available tools. This book aims to provide the requisite understanding of key aspects of RTM, and in doing so help identify and thus avoid potential pitfalls. Reactive Transport Modeling covers: the application of RTM for CO2 sequestration and geothermal energy development; reservoir quality prediction; modeling diagenesis; modeling geochemical processes in oil & gas production; modeling gas hydrate production; reactive transport in fractured and porous media; reactive transport studies for nuclear waste disposal; reactive flow modeling in hydrothermal systems; and modeling biogeochemical processes. Key features include: A comprehensive reference for scientists and practitioners entering the area of reactive transport modeling (RTM) Presented by internationally known experts in the field Covers fundamental theory, practical issues in running reactive transport models, and hands-on examples for applying techniques in specific areas Teaches readers to appreciate the power of RTM and to stimulate usage and application Reactive Transport Modeling is written for graduate students and researchers in academia, government laboratories, and industry who are interested in applying reactive transport modeling to the topic of their research. The book will also appeal to geochemists, hydrogeologists, geophysicists, earth scientists, environmental engineers, and environmental chemists.

Reactive Transport Modeling

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Publisher : John Wiley & Sons
ISBN 13 : 1119060001
Total Pages : 594 pages
Book Rating : 4.1/5 (19 download)

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Book Synopsis Reactive Transport Modeling by : Yitian Xiao

Download or read book Reactive Transport Modeling written by Yitian Xiao and published by John Wiley & Sons. This book was released on 2018-06-05 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Teaches the application of Reactive Transport Modeling (RTM) for subsurface systems in order to expedite the understanding of the behavior of complex geological systems This book lays out the basic principles and approaches of Reactive Transport Modeling (RTM) for surface and subsurface environments, presenting specific workflows and applications. The techniques discussed are being increasingly commonly used in a wide range of research fields, and the information provided covers fundamental theory, practical issues in running reactive transport models, and how to apply techniques in specific areas. The need for RTM in engineered facilities, such as nuclear waste repositories or CO2 storage sites, is ever increasing, because the prediction of the future evolution of these systems has become a legal obligation. With increasing recognition of the power of these approaches, and their widening adoption, comes responsibility to ensure appropriate application of available tools. This book aims to provide the requisite understanding of key aspects of RTM, and in doing so help identify and thus avoid potential pitfalls. Reactive Transport Modeling covers: the application of RTM for CO2 sequestration and geothermal energy development; reservoir quality prediction; modeling diagenesis; modeling geochemical processes in oil & gas production; modeling gas hydrate production; reactive transport in fractured and porous media; reactive transport studies for nuclear waste disposal; reactive flow modeling in hydrothermal systems; and modeling biogeochemical processes. Key features include: A comprehensive reference for scientists and practitioners entering the area of reactive transport modeling (RTM) Presented by internationally known experts in the field Covers fundamental theory, practical issues in running reactive transport models, and hands-on examples for applying techniques in specific areas Teaches readers to appreciate the power of RTM and to stimulate usage and application Reactive Transport Modeling is written for graduate students and researchers in academia, government laboratories, and industry who are interested in applying reactive transport modeling to the topic of their research. The book will also appeal to geochemists, hydrogeologists, geophysicists, earth scientists, environmental engineers, and environmental chemists.

Coupled Transport Phenomena in the Opalinus Clay

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Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.:/5 (454 download)

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Book Synopsis Coupled Transport Phenomena in the Opalinus Clay by : Josep M. Soler

Download or read book Coupled Transport Phenomena in the Opalinus Clay written by Josep M. Soler and published by . This book was released on 1999 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Compacted clays as barriers to radionuclide transport

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Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)

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Book Synopsis Compacted clays as barriers to radionuclide transport by : D. W. Oscarson

Download or read book Compacted clays as barriers to radionuclide transport written by D. W. Oscarson and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Modeling Approach for Evaluating Radionuclide Transport in Nuclear-stimulated Gas Reservoirs

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Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.:/5 (494 download)

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Book Synopsis Modeling Approach for Evaluating Radionuclide Transport in Nuclear-stimulated Gas Reservoirs by : Clay Cooper

Download or read book Modeling Approach for Evaluating Radionuclide Transport in Nuclear-stimulated Gas Reservoirs written by Clay Cooper and published by . This book was released on 2001 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Finite Element Models for Sediment and Contaminant Transport in Surface Waters

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Publisher :
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Finite Element Models for Sediment and Contaminant Transport in Surface Waters by : Yasuo Onishi

Download or read book Finite Element Models for Sediment and Contaminant Transport in Surface Waters written by Yasuo Onishi and published by . This book was released on 1977 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Coupled Transport Phenomena in the Opalinus Clay

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Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Coupled Transport Phenomena in the Opalinus Clay by : J. M. Soler

Download or read book Coupled Transport Phenomena in the Opalinus Clay written by J. M. Soler and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: