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Study of the Feasibility of Shipping the First Spent Core From Elk River, Minn. To Policoro, Italy. Final Report, August 1 to September 15, 1961

Description: A study was conducted to assess the feasibility of transporting the first spent core of the Elk River Power Reactor to Policoro, ltaly. Commercial transport arrangements were also examined and it was found that changes in indemnity and/or insurance are required. Other aspects appear favorable. (J.R.D.)
Date: September 15, 1961
Creator: Fraenkel, S.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Safety-analysis report for packaging (SARP) general-purpose heat-source module 750-Watt shipping container

Description: The SARP includes discussions of structural integrity, thermal resistance, radiation shielding and radiological safety, nuclear criticality safety, and quality control. Extensive tests and evaluations were performed to show that the container will function effectively with respect to all required standards and when subjected to normal transportation conditions and the sequence of four hypothetical accident conditions (free drop, puncture, thermal, and water immersion). In addition, a steady sta… more
Date: October 15, 1981
Creator: Whitney, M. A.; Burgan, C. E.; Blauvelt, R. K.; Zocher, R. W. & Bronisz, S. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Basalt weathering rates on Earth and the duration of liquid water on the plains of Gusev Crater, Mars

Description: Where Martian rocks have been exposed to liquid water, chemistry versus depth profiles could elucidate both Martian climate history and potential for life. The persistence of primary minerals in weathered profiles constrains the exposure time to liquid water: on Earth, mineral persistence times range from {approx}10 ka (olivine) to {approx}250 ka (glass) to {approx}1Ma (pyroxene) to {approx}5Ma (plagioclase). Such persistence times suggest mineral persistence minima on Mars. However, Martian so… more
Date: March 15, 2008
Creator: Steefel, Carl; Hausrath, E. M.; Navarre-Sitchler, A. K.; Sak, P. B.; Steefel, C. & Brantley, S. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Nanocrystal Solar Cells

Description: This dissertation presents the results of a research agenda aimed at improving integration and stability in nanocrystal-based solar cells through advances in active materials and device architectures. The introduction of 3-dimensional nanocrystals illustrates the potential for improving transport and percolation in hybrid solar cells and enables novel fabrication methods for optimizing integration in these systems. Fabricating cells by sequential deposition allows for solution-based assembly of… more
Date: December 15, 2006
Creator: Gur, Ilan
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Joint inversion of crosshole radar and seismic traveltimes acquired at the South Oyster BacterialTransport Site

Description: The structural approach to joint inversion, entailing common boundaries or gradients, offers a flexible way to invert diverse types of surface-based and/or crosshole geophysical data. The cross-gradients function has been introduced as a means to construct models in which spatial changes in two models are parallel or anti-parallel. Inversion methods that use such structural constraints also provide estimates of non-linear and non-unique field-scale relationships between model parameters. Here, … more
Date: April 15, 2008
Creator: Linde, Niklas; Tryggvason, Ari; Peterson, John & Hubbard, Susan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effect of Saline Waste Solution Infiltration Rates on Uranium Retention and Spatial Distribution in Hanford Sediments

Description: The accidental overfilling of waste liquid from tank BX-102 at the Hanford Site in 1951 put about 10 metric tons of U(VI) into the vadose zone. In order to understand the dominant geochemical reactions and transport processes occurred during the initial infiltration and help understand current spatial distribution, we simulated the waste liquid spilling event in laboratory sediment columns using synthesized metal waste solution. We found that, as the plume propagating through sediments, pH decr… more
Date: March 15, 2007
Creator: Wan, Jiamin; Tokunaga, Tetsu K.; Kim, Yongman; Wang, Zheming; Lanzirotti, Antonio; Saiz, Eduardo et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pyrite oxidation in saturated and Unsaturated Porous Media Flow: AComparison of alternative mathematical modeling approaches

Description: Pyrite (FeS{sub 2}) is one of the most common naturally occurring minerals that is present in many subsurface environments. It plays an important role in the genesis of enriched ore deposits through weathering reactions, is the most abundant sulfide mineral in many mine tailings, and is the primary source of acid drainage from mines and waste rock piles. The pyrite oxidation reaction serves as a prototype for oxidative weathering processes with broad significance for geoscientific, engineering,… more
Date: February 15, 1998
Creator: Xu, Tianfu; White, Stephen P. & Pruess, Karsten
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reactive Geochemical Transport Modeling of Concentrated Aqueous Solutions: Supplement to TOUGHREACT User's Guide for the PitzerIon-Interaction Model

Description: In this report, we present: -- The Pitzer ion-interactiontheory and models -- Input file requirements for using the TOUGHREACTPitzer ion-interaction model and associated databases -- Run-time errormessages -- Verification test cases and application examples. For themain code structure, features, overall solution methods, description ofinput/output files for parameters other than those specific to theimplemented Pitzer model, and error messages, see the TOUGHREACT User'sGuide (Xu et al., 2005). … more
Date: December 15, 2006
Creator: Zhang, Guoxiang; Spycher, Nicolas; Xu, Tianfu; Sonnenthal, Eric & Steefel , Carl
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Modeling of coupled heat transfer and reactive transport processesin porous media: Application to seepage studies at Yucca Mountain, Nevada

Description: When hot radioactive waste is placed in subsurface tunnels, a series of complex changes occurs in the surrounding medium. The water in the pore space of the medium undergoes vaporization and boiling. Subsequently, vapor migrates out of the matrix pore space, moving away from the tunnel through the permeable fracture network. This migration is propelled by buoyancy, by the increased vapor pressure caused by heating and boiling, and through local convection. In cooler regions, the vapor condenses… more
Date: January 15, 2007
Creator: Mukhopadhyay, S.; Sonnenthal, E.L. & Spycher, N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Porphyrin-Based Photocatalytic Lithography

Description: Photocatalytic lithography is an emerging technique that couples light with coated mask materials in order to pattern surface chemistry. We excite porphyrins to create radical species that photocatalytically oxidize, and thereby pattern, chemistries in the local vicinity. The technique advantageously does not necessitate mass transport or specified substrates, it is fast and robust and the wavelength of light does not limit the resolution of patterned features. We have patterned proteins and ce… more
Date: October 15, 2007
Creator: Bearinger, J.; Stone, G.; Christian, A.; Dugan, L.; Hiddessen, A.; Wu, K. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dust Studies in DIII-D Tokamak

Description: Studies of submicron dust using Mie scattering from Nd:YAG lasers and video data of micron to sub-millimeter sized dust on DIII-D tokamak have provided the first data of dust sources and transport during tokamak discharges. During normal operation on DIII-D dust observation rates are low, a few events per discharge or less. The net carbon content of the dust corresponds to a carbon atom density a few orders of magnitude below the core impurity density. Statistical analysis of Mie data collected… more
Date: April 15, 2008
Creator: Rudakov, D. L.; West, W. P.; Groth, M.; Yu, J. H.; Boedo, J. A.; Bray, B. D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modeling of coupled heat transfer and reactive transport processes in porous media: Application to seepage studies at Yucca Mountain, Nevada

Description: When hot radioactive waste is placed in subsurface tunnels, a series of complex changes occurs in the surrounding medium. The water in the pore space of the medium undergoes vaporization and boiling. Subsequently, vapor migrates out of the matrix pore space, moving away from the tunnel through the permeable fracture network. This migration is propelled by buoyancy, by the increased vapor pressure caused by heating and boiling, and through local convection. In cooler regions, the vapor condenses… more
Date: January 15, 2007
Creator: Mukhopadhyay, Sumit; Sonnenthal, Eric L. & Spycher, Nicolas
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Exact Averaging of Stochastic Equations for Flow in Porous Media

Description: It is well known that at present, exact averaging of the equations for flow and transport in random porous media have been proposed for limited special fields. Moreover, approximate averaging methods--for example, the convergence behavior and the accuracy of truncated perturbation series--are not well studied, and in addition, calculation of high-order perturbations is very complicated. These problems have for a long time stimulated attempts to find the answer to the question: Are there in exis… more
Date: March 15, 2008
Creator: Karasaki, Kenzi; Shvidler, Mark & Karasaki, Kenzi
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Uncertainty in the reactive transport model response to analkaline perturbation in a clay formation

Description: The mineral alteration in the concrete barrier and in the clay formation around long-lived intermediate-level radioactive waste in the French deep geological disposal concept is evaluated using numerical modeling. There are concerns that the mineralogical composition of the surrounded clay will not be stable under the high alkaline pore fluid conditions caused by concrete (pH {approx} 12). Conversely, the infiltration of CO{sub 2}-rich groundwater from the clay formation into initially unsatura… more
Date: March 15, 2006
Creator: Burnol, A.; Blanc, P.; Xu, T.; Spycher, N. & Gaucher, E. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Linking reaction, transport, and hydrological parameters inunsaturated fractured rock: toughreact implementation andapplication

Description: Modeling coupled water-gas-rock interactions in unsaturated fractured rock requires conceptual and numerical model considerations beyond those developed for saturated porous media. This paper focuses on the integration of the geological and hydrological parameters into the calculation of reactive-transport parameters and the feedback of mineral precipitation/dissolution to flow and transport. These basic relations have been implemented in the reactive transport code TOUGHREACT (Xu et al., 2003)… more
Date: May 15, 2003
Creator: Sonnenthal, Eric; Spycher, Nicolas & Xu, Tianfu
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Preface: Recent Advances in Modeling Multiphase Flow and Transportwith the TOUGH Family of Codes

Description: A symposium on research carried out using the TOUGH family of numerical codes was held from May 15 to 17, 2006, at the Lawrence Berkeley National Laboratory. This special issue of the 'Vadose Zone Journal' contains revised and expanded versions of a selected set of papers presented at this symposium (TOUGH Symposium 2006; http://esd.lbl.gov/TOUGHsymposium), all of which focus on multiphase flow, including flow in the vadose zone.
Date: November 15, 2007
Creator: Liu, Hui-Hai & Illangasekare, Tissa H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Colloid migration in fractured media

Description: Field studies at the Nevada Test Site by researchers at Lawrence Livermore National Laboratory have demonstrated that radionuclides are being transported by colloidal material suspended in groundwater. This observation is counter to most predictions from contaminant transport models because the models assume adsorbed species are immobile. The purpose of this research is to quantify the transport processes for colloidal materials and develop the mechanistic understanding necessary to predict rad… more
Date: September 15, 1989
Creator: Hunt, J.R. (California Univ., Berkeley, CA (USA). Dept. of Civil Engineering)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal distribution, January--September 1990. [Contains glossary]

Description: This issue presents information for January through September 1990. Coal distribution data are shown by coal-producing state of origin, consumer use, method of transportation, and state of destination. All data in this report for 1990 are preliminary. Data for previous years are final. 6 figs., 34 tabs.
Date: January 15, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Followup Audit of the Cask Development Program

Description: The Department of Energy is responsible for developing a system for the transportation and storage of spent nuclear fuel generated by utility companies. To carry out this responsibility, the Department of Energy established the Office of Civilian Radioactive Waste Management (Waste Management Office). The Waste Management office began development of a series of new shipping casks to transport the spent fuel. The purpose of this audit was to review the current development status of the cask desi… more
Date: March 15, 1994
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mixed Waste Integrated Program Quality Assurance requirements plan

Description: Mixed Waste Integrated Program (MWIP) is sponsored by the US Department of Energy (DOE), Office of Technology Development, Waste Management Division. The strategic objectives of MWIP are defined in the Mixed Waste Integrated Program Strategic Plan, and expanded upon in the MWIP Program Management Plan. This MWIP Quality Assurance Requirement Plan (QARP) applies to mixed waste treatment technologies involving both hazardous and radioactive constituents. As a DOE organization, MWIP is required to… more
Date: April 15, 1994
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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System response of a DOE Defense Program package in a transportation accident environment

Description: The system response in a transportation accident environment is an element to be considered in an overall Transportation System Risk Assessment (TSRA) framework. The system response analysis uses the accident conditions and the subsequent accident progression analysis to develop the accident source term, which in turn, is used in the consequence analysis. This paper proposes a methodology for the preparation of the system response aspect of the TSRA.
Date: October 15, 1992
Creator: Chen, T. F.; Hovingh, J. & Kimura, C. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Transportation System Risk Assessment on DOE Defense Program shipments

Description: Substantial effort has been expended concerning the level of safety provided to persons, property, and the environment from the hazards associated with transporting radioactive material. This work provided an impetus for the Department of Energy to investigate the use of probabilistic risk assessment techniques to supplement the deterministic approach to transportation safety. The DOE recently decided to incorporate the methodologies associated with PRAs in the process for authorizing the trans… more
Date: October 15, 1992
Creator: Brumburgh, G. P.; Kimura, C. Y.; Alesso, H. P. & Prassinos, P. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Evaluation of Technologies for Retrieval of Waste from Leaking Tanks

Description: The US Department of Energy Environmental and Waste Management Tanks Focus Area selected as a strategic initiative the need to identify and develop technologies for remediation of tanks that are known or are suspected to leak. This investigation identified and evaluated technical options for single-shell tank waste retrieval applicable to retrieve waste from potentially leaking tanks. Technologies that minimize leakage use minimal water, and dry retrieval technologies were evaluated. Safety, co… more
Date: October 15, 2001
Creator: Bamberger, Judith A.; Hatchell, Brian K.; Lewis, Benjamin E.; Randolph, John D. & Killough, Stephen M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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