Serial/Series Title
Evaluation of the Emission, Transport, and Deposition of Mercury, Fine Particulate Matter, and Arsenic From Coal-Based Power Plants in the Ohio River Valley Region Progress Report
4
Fiscal Year 2000
4
ARM Facilities Newsletter
2
Fiscal Year 2002
2
Fiscal Year 2003
2
Fiscal Year 2004
2
Fiscal Year 2005
2
Winter Fuels Report
2
Carbon Sequestration on Surface Mine Lands Quarterly Report
1
Development fo Novel Boron-based Multilayer Thin-Film Progress Report
1
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adendum for )6 report
Prior to using human nasopharyngeal samples, we will use prepared mixtures of viruses with bacteria and eukaryotic cells in our research on microfluidic separation techniques. Some examples of these mixtures are the bacteriophage MS2 with its host bacteria, E. coli, and BSL-1, Risk-Group-1 virus such as fowlpox virus vaccine with its host cell, DF-1, derived from chickens.
Date:
February 2, 2007
Creator:
Mariella, R.; Borucki, M.; Miles, R.; Claugue, D.; Dougherty, G. & Fisher, K.
Object Type:
Report
System:
The UNT Digital Library
Adjoint-Based Uncertainty Quantification with MCNP
None
Date:
September 2, 2011
Creator:
Seifried, J E
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Adoption of Advanced Fuel Cycle Technology Under a Single Repository Policy
Develops the tools to investiage the hypothesis that the savings in repository space associated with the implementation of advanced nuclear fuel cycles can result in sufficient cost savings to offset the higher costs of those fuel cycles.
Date:
November 2, 2009
Creator:
Wilson, Paul
Object Type:
Report
System:
The UNT Digital Library
Advanced Characterization of Fractured Reservoirs in Carbonate Rocks: The Michigan Basin
The purpose of the study was to collect and analyze existing data on the Michigan Basin for fracture patterns on scales ranging form thin section to basin. The data acquisition phase has been successfully concluded with the compilation of several large digital databases containing nearly all the existing information on formation tops, lithology and hydrocarbon production over the entire Michigan Basin. These databases represent the cumulative result of over 80 years of drilling and exploration.
Date:
December 2, 2002
Creator:
Wood, James R. & Harrison, William B.
Object Type:
Report
System:
The UNT Digital Library
Advanced coal liquefaction. Final project report
Molecular level liquid phase separation was explored using modified microporous ceramic membranes with pore size reduced from 40{Angstrom} via chemical vapor deposition. At room temperature, membranes with pore sizes <30{Angstrom} were sufficient to achieve >97% rejection of naphthyl-bibenzyl-methane (NBBM) in toluene, likely attributed to the hindrance effect of NBBM through the porous avenue of the membrane. The rejection diminished dramatically as the temperature was increased. The permeance of the mixture was substantially lower than that of the solvent resulted from the interference by the solute through the transport avenue. Also, it was found that the rejection increases along with the transmembrane pressure increase, probably attributed to the pore size distribution of the membrane. The smaller pore sizes become accessible to the solvent while rejecting the solute at the higher pressure. In addition to size-based separation, active transport of molecules through an appropriate pore size at 300-400{degrees}C was observed, as a result of interaction with the surface. Decomposition of NBBM took place at 400{degrees}C in a modified membrane packed with the catalyst synthesized using the similar protocol as membranes. The separation property of this membrane at 400{degrees}C was analyzed indirectly based upon the reaction product distribution.
Date:
December 2, 1996
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced Control Technologies and Strategies Linking DemandResponse and Energy Efficiency
This paper presents a preliminary framework to describe how advanced controls can support multiple modes of operations including both energy efficiency and demand response (DR). A general description of DR, its benefits, and nationwide status is outlined. The role of energy management and control systems for DR is described. Building systems such as HVAC and lighting that utilize control technologies and strategies for energy efficiency are mapped on to DR and demand shedding strategies are developed. Past research projects are presented to provide a context for the current projects. The economic case for implementing DR from a building owner perspective is also explored.
Date:
September 2, 2005
Creator:
Kiliccote, Sila & Piette, Mary Ann
Object Type:
Article
System:
The UNT Digital Library
Advanced Recovery and Integrated Extraction System (ARIES) program plan. Rev. 1
The Advanced Recovery and Integrated Extraction System (ARIES) demonstration combines various technologies, some of which were/are being developed under previous/other Department of Energy (DOE) funded programs. ARIES is an overall processing system for the dismantlement of nuclear weapon primaries. The program will demonstrate dismantlement of nuclear weapons and retrieval of the plutonium into a form that is compatible with long term storage and that is inspectable in an unclassified form appropriate for the application of traditional international safeguards. The success of the ARIES demonstration would lead to the development of a transportable modular or other facility type systems for weapons dismantlement to be used at other DOE sites as well as in other countries.
Date:
February 2, 1996
Creator:
Nelson, T.O.; Massey, P.W. & Cremers, T.L.
Object Type:
Report
System:
The UNT Digital Library
Advanced steady-state operating scenarios
The goal for advanced steady-state operation in ITER should be to demonstrate the operation of the plasma core for a steady-state fusion reactor. To accomplish this the authors must develop steady-state operating scenarios at high beta for high fusion power density, low auxiliary power requirements (Q{sub CD} {ge} 25, where Q{sub CD} {triple_bond}P fusion/P{sub CD} and P{sub DC} is the power required for sustaining the plasma current) for low recirculating power requirements, and at moderate safety factor (q{sub {psi}} {le} 4.5) to minimize the cost for the tokamak core of a steady-state demonstration power reactor based on the operating modes demonstrated in ITER. The key to achieving steady-state operation at high fusion power in ITER will be the development of operating scenarios with very high bootstrap current fractions (f{sub BS} {ge} 90%) in which the radial profile of the bootstrap current density is well aligned with that of the total plasma current density, and for which the MHD {beta}-limit exceeds {beta}{sub n}{sup *} = 0.05 T{minus}m/MA. They are in the process of developing such operating modes for ITER. In {section}1 they propose two advanced steady-state operating points; a preliminary operating point that was the basis for the MHD studies reported …
Date:
December 2, 1993
Creator:
Nevins, W. M.; Bulmer, R. H.; Pearlstein, L. D.; Haney, S. W. & Manickam, J.
Object Type:
Report
System:
The UNT Digital Library
Advanced wall-fired boiler combustion techniques for the reduction of nitrogen oxides (NO{sub x}): Low NO{sub x} burner test phase results
This paper discusses the technical progress of a US Department of Energy Innovative Clean Coal Technology project demonstrating advanced wall-fired combustion techniques for the reduction of nitrogen oxide(NO{sub x}) emissions from coal-fired boilers. The primary objective of the demonstration is to determine the performance of two low NO{sub x} combustion technologies applied in a stepwise fashion to a 500 MW boiler. A target of achieving 50 percent NO{sub x} reductions has been established for the project. The main focus of this paper is the presentation of the low NO{sub x} burner (LNB) short and long-term tests results.
Date:
June 2, 1992
Creator:
Sorge, J. N.; Baldwin, A. L. & Smith, L. L.
Object Type:
Article
System:
The UNT Digital Library
Advantages of improved timing accuracy in PET cameras using LSOscintillator
PET scanners based on LSO have the potential forsignificantly better coincidence timing resolution than the 6 ns fwhmtypically achieved with BGO. This study analyzes the performanceenhancements made possible by improved timing as a function of thecoincidence time resolution. If 500 ps fwhm coincidence timing resolutioncan be achieved in a complete PET camera, the following four benefits canbe realized for whole-body FDG imaging: 1) The random event rate can bereduced by using a narrower coincidence timing window, increasing thepeak NECR by~;50 percent. 2) Using time-of-flight in the reconstructionalgorithm will reduce the noise variance by a factor of 5. 3) Emissionand transmission data can be acquired simultaneously, reducing the totalscan time. 4) Axial blurring can be reduced by using time-of-flight todetermine the correct axial plane that each event originated from. Whiletime-of-flight was extensively studied in the 1980's, practical factorslimited its effectiveness at that time and little attention has been paidto timing in PET since then. As these potential improvements aresubstantial and the advent of LSO PET cameras gives us the means toobtain them without other sacrifices, efforts to improve PET timingshould resume after their long dormancy.
Date:
December 2, 2002
Creator:
Moses, William W.
Object Type:
Article
System:
The UNT Digital Library
An aerial survey of radioactivity associated with Atomic Energy plants
The project covered was an endeavor to (1) compare a group of laboratory instruments as airborne detectors of radioactivity and (2) simultaneously obtain data relative to the diffusion rate of radioactive contamination emitted into the atmosphere from off-gas stacks of production runs. Research was conducted in the Oak Ridge, Tennessee and Hanford, Washington areas. Detection was accomplished at a maximum distance of seventeen miles from the plant. Very little information of a conclusive nature was gained concerning the diffusion. Further research with the nuclear instruments, using a stronger source, is recommended. To obtain conclusive information concerning the meteorological aspects of the project, a larger observational program will be needed.
Date:
September 2, 1992
Creator:
Davis, F. J.; Harlan, W. E.; Humphrey, P. A.; Kane, R. L. & Reinhardt, P. W.
Object Type:
Report
System:
The UNT Digital Library
Aerosols and clouds in chemical transport models and climate models.
Clouds exert major influences on both shortwave and longwave radiation as well as on the hydrological cycle. Accurate representation of clouds in climate models is a major unsolved problem because of high sensitivity of radiation and hydrology to cloud properties and processes, incomplete understanding of these processes, and the wide range of length scales over which these processes occur. Small changes in the amount, altitude, physical thickness, and/or microphysical properties of clouds due to human influences can exert changes in Earth's radiation budget that are comparable to the radiative forcing by anthropogenic greenhouse gases, thus either partly offsetting or enhancing the warming due to these gases. Because clouds form on aerosol particles, changes in the amount and/or composition of aerosols affect clouds in a variety of ways. The forcing of the radiation balance due to aerosol-cloud interactions (indirect aerosol effect) has large uncertainties because a variety of important processes are not well understood precluding their accurate representation in models.
Date:
March 2, 2008
Creator:
Lohmann,U. & Schwartz, S. E.
Object Type:
Article
System:
The UNT Digital Library
Age estimation in forensic sciences: Application of combined aspartic acid racemization and radiocarbon analysis
Age determination of unknown human bodies is important in the setting of a crime investigation or a mass disaster, since the age at death, birth date and year of death, as well as gender, can guide investigators to the correct identity among a large number of possible matches. Traditional morphological methods used by anthropologists to determine age are often imprecise, whereas chemical analysis of tooth dentin, such as aspartic acid racemization has shown reproducible and more precise results. In this paper we analyze teeth from Swedish individuals using both aspartic acid racemization and radiocarbon methodologies. The rationale behind using radiocarbon analysis is that above-ground testing of nuclear weapons during the cold war (1955-1963) caused an extreme increase in global levels of carbon-14 ({sup 14}C) which have been carefully recorded over time. Forty-four teeth from 41 individuals were analyzed using aspartic acid racemization analysis of tooth crown dentin or radiocarbon analysis of enamel and ten of these were split and subjected to both radiocarbon and racemization analysis. Combined analysis showed that the two methods correlated well (R2=0.66, p < 0.05). Radiocarbon analysis showed an excellent precision with an overall absolute error of 0.6 {+-} 04 years. Aspartic acid racemization also showed …
Date:
November 2, 2009
Creator:
Alkass, K.; Buchholz, B. A.; Ohtani, S.; Yamamoto, T.; Druid, H. & Spalding, S. L.
Object Type:
Article
System:
The UNT Digital Library
Age-Related Degradation of Structures and Passive Components at Nuclear Power Plants.
None
Date:
April 2, 2000
Creator:
Braverman, J. I.
Object Type:
Article
System:
The UNT Digital Library
Agent-Based Mediation and Cooperative Information Systems
This report describes the results of research and development in the area of communication among disparate species of software agents. The two primary elements of the work are the formation of ontologies for use by software agents and the means by which software agents are instructed to carry out complex tasks that require interaction with other agents. This work was grounded in the areas of commercial transport and cybersecurity.
Date:
June 2, 2002
Creator:
PHILLIPS, LAURENCE R.; LINK, HAMILTON E. & GOLDSMITH, STEVEN Y.
Object Type:
Report
System:
The UNT Digital Library
AIR PASSIVATION OF METAL HYDRIDE BEDS FOR WASTE DISPOSAL
Metal hydride beds offer compact, safe storage of tritium. After metal hydride beds have reached the end of their useful life, the beds will replaced with new beds and the old beds prepared for disposal. One acceptance criteria for hydride bed waste disposal is that the material inside the bed not be pyrophoric. To determine the pyrophoric nature of spent metal hydride beds, controlled air ingress tests were performed. A simple gas handling manifold fitted with pressure transducers and a calibrated volume were used to introduce controlled quantities of air into a metal hydride bed and the bed temperature rise monitored for reactivity with the air. A desorbed, 4.4 kg titanium prototype hydride storage vessel (HSV) produced a 4.4 C internal temperature rise upon the first air exposure cycle and a 0.1 C temperature rise upon a second air exposure. A total of 346 scc air was consumed by the bed (0.08 scc per gram Ti). A desorbed, 9.66 kg LaNi{sub 4.25}Al{sub 0.75} prototype storage bed experienced larger temperature rises over successive cycles of air ingress and evacuation. The cycles were performed over a period of days with the bed effectively passivated after the 12th cycle. Nine to ten STP-L …
Date:
July 2, 2007
Creator:
Klein, J & R. H. Hsu, R
Object Type:
Article
System:
The UNT Digital Library
Air Quality and Road Emission Results for Fort Stewart, Georgia
The Directorate of Public Works Environmental & Natural Resources Division (Fort Stewart /Hunter Army Airfield) contracted with the Pacific Northwest National Laboratory (PNNL) to monitor particulate matter (PM) concentrations on Fort Stewart, Georgia. The purpose of this investigation was to establish a PM sampling network using monitoring equipment typically used in U.S. Environmental Protection Agency (EPA) ''saturation sampling'', to determine air quality on the installation. In this initial study, the emphasis was on training-generated PM, not receptor PM loading. The majority of PM samples were 24-hr filter-based samples with sampling frequency ranging from every other day, to once every six days synchronized with the EPA 6th day national sampling schedule. Eight measurement sites were established and used to determine spatial variability in PM concentrations and evaluate whether fluctuations in PM appear to result from training activities and forest management practices on the installation. Data collected to date indicate the average installation PM2.5 concentration is lower than that of nearby urban Savannah, Georgia. At three sites near the installation perimeter, analyses to segregate PM concentrations by direction of air flow across the installation boundary indicate that air (below 80 ft) leaving the installation contains less PM2.5 than that entering the installation. …
Date:
February 2, 2004
Creator:
Kirkham, Randy R.; Driver, Crystal J.; Chamness, Mickie A. & Barfuss, Brad C.
Object Type:
Report
System:
The UNT Digital Library
Alaska Wood Biomass Energy Project Final Report
The purpose of the Craig Wood Fired Boiler Project is to use waste wood from local sawmilling operations to provide heat to local public buildings, in an effort to reduce the cost of operating those buildings, and put to productive use a byproduct from the wood milling process that otherwise presents an expense to local mills. The scope of the project included the acquisition of a wood boiler and the delivery systems to feed wood fuel to it, the construction of a building to house the boiler and delivery systems, and connection of the boiler facility to three buildings that will benefit from heat generated by the boiler: the Craig Aquatic Center, the Craig Elementary School, and the Craig Middle School buildings.
Date:
March 2, 2009
Creator:
Bolling, Jonathan
Object Type:
Report
System:
The UNT Digital Library
Algorithm Development for the Enhanced Radiological Nuclear Inspection and Evaluation (ERNIE) Tool
None
Date:
August 2, 2013
Creator:
Jacomb-Hood, T W
Object Type:
Report
System:
The UNT Digital Library
Alignment of the Pixel and SCT Modules for the 2004 ATLAS Combined Test Beam
A small set of final prototypes of the ATLAS Inner Detector silicon tracking system(Pixel Detector and SemiConductor Tracker), were used to take data during the 2004 Combined Test Beam. Data were collected from runs with beams of different flavour (electrons, pions, muons and photons) with a momentum range of 2 to 180 GeV/c. Four independent methods were used to align the silicon modules. The corrections obtained were validated using the known momenta of the beam particles and were shown to yield consistent results among the different alignment approaches. From the residual distributions, it is concluded that the precision attained in the alignmentof the silicon modules is of the order of 5 mm in their most precise coordinate.
Date:
June 2, 2008
Creator:
Ahmad, A.; Andreazza, A.; Atkinson, T.; Baines, J.; Barr, A. J.; Beccherle, R. et al.
Object Type:
Article
System:
The UNT Digital Library
All Metal Iron Core For A Low Aspect Ratio Tokamak
A novel concept for incorporating a iron core transformer within a axisymmetric toroidal plasma containment device with a high neutron flux is described. This design enables conceptual design of low aspect ratio devices which employ standard transformer-driven plasma startup by using all-metal high resistance separators between the toroidal field windings. This design avoids the inherent problems of a multiturn air core transformer which will inevitably suffer from strong neutron bombardment and hence lose the integrity of its insulation, both through long term material degradation and short term neutron- induced conductivity.. A full 3-dimensional model of the concept has been developed within the MAXWELL program and the resultant loop voltage calculated. The utility of the result is found to be dependent on the resistivity of the high resistance separators. Useful loop voltage time histories have been obtained using achievable resistivities.
Date:
June 2, 2010
Creator:
Gates, D. A.; Jun, C.; Zatz, I. & Zolfaghari, A.
Object Type:
Report
System:
The UNT Digital Library
Allowable Isotopic Mass Limits for the Type 4 Contents in the Model 9977-96 SGQ-EC1 Unshielded Engineered Container
None
Date:
September 2, 2010
Creator:
Sitaraman, S.; Biswas, D.; Hafner, R. & Anderson, B.
Object Type:
Report
System:
The UNT Digital Library
Alloy Design and Thermomechanical Processing of a Beta Titanium Alloy for a Heavy Vehicle Application
With the strength of steel, but at half the weight, titanium has the potential to offer significant benefits in the weight reduction of heavy vehicle components while possibly improving performance. However, the cost of conventional titanium fabrication is a major barrier in implementation. New reduction technologies are now available that have the potential to create a paradigm shift in the way the United States uses titanium, and the economics associated with fabrication of titanium components. This CRADA project evaluated the potential to develop a heavy vehicle component from titanium powders. The project included alloy design, development of manufacturing practices, and modeling the economics associated with the new component. New Beta alloys were designed for this project to provide the required mechanical specifications while utilizing the benefits of the new fabrication approach. Manufacturing procedures were developed specific to the heavy vehicle component. Ageing and thermal treatment optimization was performed to provide the desired microstructures. The CRADA partner established fabrication practices and targeted capital investment required for fabricating the component out of titanium. Though initial results were promising, the full project was not executed due to termination of the effort by the CRADA partner and economic trends observed in the heavy vehicle …
Date:
July 2, 2010
Creator:
Blue, Craig A. & Peter, William H.
Object Type:
Report
System:
The UNT Digital Library
Alternate fuel cycle technologies, nitrate-to-oxide conversion project. Progress report, January--June 1977
Work is being done at the Rocky Flats Plant (RFP) under contract from the Savannah River Operations Office (SROO) of the U.S. Energy Research and Development Administration (ERDA) to critically analyze and evaluate existing technology for converting plutonium nitrate to plutonium oxide, and to recommend flow sheets and equipment for this process. Seven such processes were compared using an expanded process-comparison scheme. The results of the comparison differed somewhat from the initial comparison made in September, 1976. The direct calcination methods, headed by the screw calciner process, received the highest ratings when operating experience was considered with a small weighting factor. These methods are much simpler than the others. The oxalate precipitation methods, headed by the plutonium(IV) oxalate precipitation and calcination process, received highest ratings when operating experience was strongly considered. Thus, in the long term, the screw calciner or other direct-conversion methods should be developed. For a plant to be built in the short term, however, an oxalate precipitation method should be used since a larger amount of experience exists with these processes. The block flow diagrams, material balances, and equipment flow sheets for each of the seven processes compared are included in this report. A process-design criterion is …
Date:
September 2, 1977
Creator:
Lehmkuhl, G. D.
Object Type:
Report
System:
The UNT Digital Library