The Multi Scale Model Approach To Thermohydrology At Yucca Mountain

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The Multi-Scale Model Approach to Thermohydrology at Yucca Mountain

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ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.:/5 (682 download)

Book Synopsis The Multi-Scale Model Approach to Thermohydrology at Yucca Mountain by :

Download or read book The Multi-Scale Model Approach to Thermohydrology at Yucca Mountain written by and published by . This book was released on 2002 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Multi-Scale Thermo-Hydrologic (MSTH) process model is a modeling abstraction of them1 hydrology (TH) of the potential Yucca Mountain repository at multiple spatial scales. The MSTH model as described herein was used for the Supplemental Science and Performance Analyses (BSC, 2001) and is documented in detail in CRWMS M & O (2000) and Glascoe et al. (2002). The model has been validated to a nested grid model in Buscheck et al. (In Review). The MSTH approach is necessary for modeling thermal hydrology at Yucca Mountain for two reasons: (1) varying levels of detail are necessary at different spatial scales to capture important TH processes and (2) a fully-coupled TH model of the repository which includes the necessary spatial detail is computationally prohibitive. The MSTH model consists of six ''submodels'' which are combined in a manner to reduce the complexity of modeling where appropriate. The coupling of these models allows for appropriate consideration of mountain-scale thermal hydrology along with the thermal hydrology of drift-scale discrete waste packages of varying heat load. Two stages are involved in the MSTH approach, first, the execution of submodels, and second, the assembly of submodels using the Multi-scale Thermohydrology Abstraction Code (MSTHAC). MSTHAC assembles the submodels in a five-step process culminating in the TH model output of discrete waste packages including a mountain-scale influence.

Multiscale Thermohydrologic Model

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (682 download)

Book Synopsis Multiscale Thermohydrologic Model by :

Download or read book Multiscale Thermohydrologic Model written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance assessment and design evaluation require a modeling tool that simultaneously accounts for processes occurring at a scale of a few tens of centimeters around individual waste packages and emplacement drifts, and also on behavior at the scale of the mountain. Many processes and features must be considered, including non-isothermal, multiphase-flow in rock of variable saturation and thermal radiation in open cavities. Also, given the nature of the fractured rock at Yucca Mountain, a dual-permeability approach is needed to represent permeability. A monolithic numerical model with all these features requires too large a computational cost to be an effective simulation tool, one that is used to examine sensitivity to key model assumptions and parameters. We have developed a multi-scale modeling approach that effectively simulates 3D discrete-heat-source, mountain-scale thermohydrologic behavior at Yucca Mountain and captures the natural variability of the site consistent with what we know from site characterization and waste-package-to-waste-package variability in heat output. We describe this approach and present results examining the role of infiltration flux, the most important natural-system parameter with respect to how thermohydrologic behavior influences the performance of the repository.

Multiscale Thermohydrologic Model Supporting the Licence Application for the Yucca Mountain Repository

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Author : Y. Sun
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (316 download)

Book Synopsis Multiscale Thermohydrologic Model Supporting the Licence Application for the Yucca Mountain Repository by : Y. Sun

Download or read book Multiscale Thermohydrologic Model Supporting the Licence Application for the Yucca Mountain Repository written by Y. Sun and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The MultiScale ThermoHydrologic Model (MSTHM) predicts thermal-hydrologic (TH) conditions within emplacement tunnels (drifts) and in the adjoining host rock at Yucca Mountain, Nevada, which is the proposed site for a radioactive waste repository in the US. Because these predictions are used in the performance assessment of the Yucca Mountain repository, they must address the influence of variability and uncertainty of the engineered- and natural-system parameters that significantly influence those predictions. Parameter-sensitivity studies show that the MSTHM predictions adequately propagate the influence of parametric variability and uncertainty. Model-validation studies show that the influence of conceptual-model uncertainty on the MSTHM predictions is insignificant compared to that of parametric uncertainty, which is propagated through the MSTHM.

Multiscale Thermohydrologic Model Analyses of Heterogeneity and Thermal-Loading Factors for the Proposed Repository at Yucca Mountain

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Total Pages : pages
Book Rating : 4.:/5 (682 download)

Book Synopsis Multiscale Thermohydrologic Model Analyses of Heterogeneity and Thermal-Loading Factors for the Proposed Repository at Yucca Mountain by :

Download or read book Multiscale Thermohydrologic Model Analyses of Heterogeneity and Thermal-Loading Factors for the Proposed Repository at Yucca Mountain written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The MultiScale ThermoHydrologic Model (MSTHM) predicts thermohydrologic (TH) conditions in emplacement drifts and the adjoining host rock throughout the proposed nuclear-waste repository at Yucca Mountain. The MSTHM is a computationally efficient approach that accounts for TH processes occurring at a scale of a few tens of centimeters around individual waste packages and emplacement drifts, and for heat flow at the multi-kilometer scale at Yucca Mountain. We present recent MSTHM simulations that address the influence of repository-scale thermal-conductivity heterogeneity and the influence of preclosure operational factors affecting thermal-loading conditions. We can now accommodate a complex repository layout with emplacement drifts lying in non-parallel planes using a superposition process that combines results from multiple mountain-scale submodels. This development, along with other improvements to the MSTHM, enables more rigorous analyses of preclosure operational factors. These improvements include the ability to (1) predict TH conditions on a drift-by-drift basis, (2) represent sequential emplacement of waste packages along the drifts, and (3) incorporate distance- and time-dependent beat-removal efficiency associated with drift ventilation. Alternative approaches to addressing repository-scale thermal-conductivity heterogeneity are investigated. We find that only one of the four MSTHM submodel types needs to incorporate thermal-conductivity heterogeneity. For a particular repository design, we find that the most influential parameters are (1) percolation-flux distribution, (2) thermal-conductivity heterogeneity within the host-rock units, (3) the sequencing of waste-package emplacement, and (4) the duration of the preclosure ventilation period.

Thermohydrologic Behavior and Repository Design at Yucca Mountain

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (682 download)

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Download or read book Thermohydrologic Behavior and Repository Design at Yucca Mountain written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Radioactive decay of nuclear waste emplaced at Yucca Mountain will produce an initial heat flux many times larger than the heat flux in some natural geothermal systems. This heat flux will change the thermal and hydrologic environment at Yucca Mountain significantly, affecting both the host rock and conditions within the emplacement tunnels (drifts). Understanding the thermohydrologic behavior in this coupled natural and engineered system is critical to the assessment of the viability of Yucca Mountain as a nuclear-waste repository site and for repository design decision-making. We report results from a study that uses our multi-scale modeling approach to explore the relationship between repository design, thermohydrologic behavior, and key repository performance measures.

Ground Water Reactive Transport Model: Cover Page; 03 REVISED eBooks End User License Agreement-Website; 04 Contents; 05 Foreword_czheng; 06 Preface; 07 Contributors; 08 Chapter 1_Yeh et al_HYDROGEOCHEMA; 09 Chapter 2_Wheeler et al_IPARS-FINAL; 10 Chapter 3_Xu et al-revised-_TOUGHREACT; 11 Chapter 4_Clement et al_RT3D; 12 Chapter 5_White et al_STOMP-ECKEChem; 13 Chapter 6_Hammond et al_PFLOTRAN; 14 Chapter 7_ Samper et al_CORE2D V4; 15 Chapter 8_ Mayer et al_MIN3P; 16 Chapter 9_ Hao et al_NUFT; 17 Index

Download Ground Water Reactive Transport Model: Cover Page; 03 REVISED eBooks End User License Agreement-Website; 04 Contents; 05 Foreword_czheng; 06 Preface; 07 Contributors; 08 Chapter 1_Yeh et al_HYDROGEOCHEMA; 09 Chapter 2_Wheeler et al_IPARS-FINAL; 10 Chapter 3_Xu et al-revised-_TOUGHREACT; 11 Chapter 4_Clement et al_RT3D; 12 Chapter 5_White et al_STOMP-ECKEChem; 13 Chapter 6_Hammond et al_PFLOTRAN; 14 Chapter 7_ Samper et al_CORE2D V4; 15 Chapter 8_ Mayer et al_MIN3P; 16 Chapter 9_ Hao et al_NUFT; 17 Index PDF Online Free

Author : Fan Zhang
Publisher : Bentham Science Publishers
ISBN 13 : 1608053067
Total Pages : 254 pages
Book Rating : 4.6/5 (8 download)

Book Synopsis Ground Water Reactive Transport Model: Cover Page; 03 REVISED eBooks End User License Agreement-Website; 04 Contents; 05 Foreword_czheng; 06 Preface; 07 Contributors; 08 Chapter 1_Yeh et al_HYDROGEOCHEMA; 09 Chapter 2_Wheeler et al_IPARS-FINAL; 10 Chapter 3_Xu et al-revised-_TOUGHREACT; 11 Chapter 4_Clement et al_RT3D; 12 Chapter 5_White et al_STOMP-ECKEChem; 13 Chapter 6_Hammond et al_PFLOTRAN; 14 Chapter 7_ Samper et al_CORE2D V4; 15 Chapter 8_ Mayer et al_MIN3P; 16 Chapter 9_ Hao et al_NUFT; 17 Index by : Fan Zhang

Download or read book Ground Water Reactive Transport Model: Cover Page; 03 REVISED eBooks End User License Agreement-Website; 04 Contents; 05 Foreword_czheng; 06 Preface; 07 Contributors; 08 Chapter 1_Yeh et al_HYDROGEOCHEMA; 09 Chapter 2_Wheeler et al_IPARS-FINAL; 10 Chapter 3_Xu et al-revised-_TOUGHREACT; 11 Chapter 4_Clement et al_RT3D; 12 Chapter 5_White et al_STOMP-ECKEChem; 13 Chapter 6_Hammond et al_PFLOTRAN; 14 Chapter 7_ Samper et al_CORE2D V4; 15 Chapter 8_ Mayer et al_MIN3P; 16 Chapter 9_ Hao et al_NUFT; 17 Index written by Fan Zhang and published by Bentham Science Publishers. This book was released on 2012 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ground water reactive transport models are useful to assess and quantify contaminant precipitation, absorption and migration in subsurface media. Many ground water reactive transport models available today are characterized by varying complexities, strengths, and weaknesses. Selecting accurate, efficient models can be a challenging task. This ebook addresses the needs, issues and challenges relevant to selecting a ground water reactive transport model to evaluate natural attenuation and alternative remediation schemes. It should serve as a handy guide for water resource managers seeking to ach.

Multiscale Thermohydrologic Model

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ISBN 13 :
Total Pages : 606 pages
Book Rating : 4.:/5 (16 download)

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Download or read book Multiscale Thermohydrologic Model written by and published by . This book was released on 2004 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the multiscale thermohydrologic model (MSTHM) is to predict the possible range of thermal-hydrologic conditions, resulting from uncertainty and variability, in the repository emplacement drifts, including the invert, and in the adjoining host rock for the repository at Yucca Mountain. Thus, the goal is to predict the range of possible thermal-hydrologic conditions across the repository; this is quite different from predicting a single expected thermal-hydrologic response. The MSTHM calculates the following thermal-hydrologic parameters: temperature, relative humidity, liquid-phase saturation, evaporation rate, air-mass fraction, gas-phase pressure, capillary pressure, and liquid- and gas-phase fluxes (Table 1-1). These thermal-hydrologic parameters are required to support ''Total System Performance Assessment (TSPA) Model/Analysis for the License Application'' (BSC 2004 [DIRS 168504]). The thermal-hydrologic parameters are determined as a function of position along each of the emplacement drifts and as a function of waste package type. These parameters are determined at various reference locations within the emplacement drifts, including the waste package and drip-shield surfaces and in the invert. The parameters are also determined at various defined locations in the adjoining host rock. The MSTHM uses data obtained from the data tracking numbers (DTNs) listed in Table 4.1-1. The majority of those DTNs were generated from the following analyses and model reports: (1) ''UZ Flow Model and Submodels'' (BSC 2004 [DIRS 169861]); (2) ''Development of Numerical Grids for UZ Flow and Transport Modeling'' (BSC 2004); (3) ''Calibrated Properties Model'' (BSC 2004 [DIRS 169857]); (4) ''Thermal Conductivity of the Potential Repository Horizon'' (BSC 2004 [DIRS 169854]); (5) ''Thermal Conductivity of the Non-Repository Lithostratigraphic Layers'' (BSC 2004 [DIRS 170033]); (6) ''Ventilation Model and Analysis Report'' (BSC 2004 [DIRS 169862]); (7) ''Heat Capacity Analysis Report'' (BSC 2004 [DIRS 170003]).

Geological Repository Systems for Safe Disposal of Spent Nuclear Fuels and Radioactive Waste

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Author : Michael J Apted
Publisher : Woodhead Publishing
ISBN 13 : 0081006527
Total Pages : 804 pages
Book Rating : 4.0/5 (81 download)

Book Synopsis Geological Repository Systems for Safe Disposal of Spent Nuclear Fuels and Radioactive Waste by : Michael J Apted

Download or read book Geological Repository Systems for Safe Disposal of Spent Nuclear Fuels and Radioactive Waste written by Michael J Apted and published by Woodhead Publishing. This book was released on 2017-05-25 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geological Repository Systems for Safe Disposal of Spent Nuclear Fuels and Radioactive Waste, Second Edition, critically reviews state-of-the-art technologies and scientific methods relating to the implementation of the most effective approaches to the long-term, safe disposition of nuclear waste, also discussing regulatory developments and social engagement approaches as major themes. Chapters in Part One introduce the topic of geological disposal, providing an overview of near-surface, intermediate depth, and deep borehole disposal, spanning low-, medium- and high-level wastes. Part Two addresses the different types of repository systems – crystalline, clay, and salt, also discussing methods of site surveying and construction. The critical safety issue of engineered barrier systems is the focus of Part Three, with coverage ranging from nuclear waste canisters, to buffer and backfill materials. Lastly, Parts Four and Five focus on safety, security, and acceptability, concentrating on repository performance assessment, then radiation protection, environmental monitoring, and social engagement. Comprehensively revised, updated, and expanded with 25% new material on topics of current importance, this is the standard reference for all nuclear waste management and geological repository professionals and researchers. Contains 25% more material on topics of current importance in this new, comprehensive edition Fully updated coverage of both near-surface/intermediate depth, and deep borehole disposal in one convenient volume Goes beyond the scientific and technical aspects of disposal to include the political, regulatory, and societal issues involved, all from an international perspective

Hydrology and Geochemistry of Yucca Mountain and Vicinity, Southern Nevada and California

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Author : John S. Stuckless
Publisher : Geological Society of America
ISBN 13 : 0813712092
Total Pages : 402 pages
Book Rating : 4.8/5 (137 download)

Book Synopsis Hydrology and Geochemistry of Yucca Mountain and Vicinity, Southern Nevada and California by : John S. Stuckless

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Validating Thermohydrologic Models Using the Drift Scale Test of the Proposed Repository at Yucca Mountain

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ISBN 13 :
Total Pages : 1 pages
Book Rating : 4.:/5 (16 download)

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Download or read book Validating Thermohydrologic Models Using the Drift Scale Test of the Proposed Repository at Yucca Mountain written by and published by . This book was released on 2007 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Scaling Methods in Soil Physics

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Author : Yakov Pachepsky
Publisher : CRC Press
ISBN 13 : 0203011066
Total Pages : 470 pages
Book Rating : 4.2/5 (3 download)

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Download or read book Scaling Methods in Soil Physics written by Yakov Pachepsky and published by CRC Press. This book was released on 2003-03-26 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scaling issue remains one of the largest problems in soil science and hydrology. This book is a unique compendium of ideas, conceptual approaches, techniques, and methodologies for scaling soil physical properties. Scaling Methods in Soil Physics covers many methods of scaling that will be useful in helping scientists across a range of soil-rel

Scientific Basis for Nuclear Waste Management

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ISBN 13 :
Total Pages : 1368 pages
Book Rating : 4.X/5 (4 download)

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Scientific Basis for Nuclear Waste Management XXII: Volume 556

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Author : David J. Wronkiewicz
Publisher :
ISBN 13 :
Total Pages : 1370 pages
Book Rating : 4.:/5 (318 download)

Book Synopsis Scientific Basis for Nuclear Waste Management XXII: Volume 556 by : David J. Wronkiewicz

Download or read book Scientific Basis for Nuclear Waste Management XXII: Volume 556 written by David J. Wronkiewicz and published by . This book was released on 1999-11-24 with total page 1370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Safe and effective management of nuclear waste provides a broad range of challenges for materials science. Waste processing, waste form and engineered barrier properties, interactions between engineered and geological systems, radiation effects, chemistry and transport of waste species, and long-term predictions of repository performance are just some of the scientific problems facing modern society. This book, the 22nd in a very successful series from MRS, offers an international and inter-disciplinary perspective on the issues, and features developments in both fundamental and applied areas. Topics include: development and characterization of ceramic waste forms; ceramic waste form corrosion; glass waste form processing; glass formulation, properties and structure; glass waste form corrosion; spent nuclear fuel; performance assessment; repository backfill; flow and transport; natural analogues; container corrosion; metal waste form corrosion; radionuclide speciation and solubility; radionuclide sorption; microbial effects; radiation effects; cement waste forms and waste treatment.

Site Characterization Progress Report: Yucca Mountain, Nevada, DOE/RW-0498, April 1997

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ISBN 13 :
Total Pages : 860 pages
Book Rating : 4.:/5 (3 download)

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High Level Radioactive Waste Management

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ISBN 13 :
Total Pages : 902 pages
Book Rating : 4.3/5 (91 download)

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Site Characterization Progress Report

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ISBN 13 :
Total Pages : 662 pages
Book Rating : 4.F/5 ( download)

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Download or read book Site Characterization Progress Report written by and published by . This book was released on 1996 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Three Dimensional Grid Generation for Geological Systems, Application to Unsaturated Zone Modeling

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Author : Charles Bubolu Haukwa
Publisher :
ISBN 13 :
Total Pages : 686 pages
Book Rating : 4.:/5 (34 download)

Book Synopsis Three Dimensional Grid Generation for Geological Systems, Application to Unsaturated Zone Modeling by : Charles Bubolu Haukwa

Download or read book Three Dimensional Grid Generation for Geological Systems, Application to Unsaturated Zone Modeling written by Charles Bubolu Haukwa and published by . This book was released on 1998 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt: