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1,626
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ASSESSMENT OF POSSIBLE CYCLE LENGTHS FOR FULLY-CERAMIC MICRO-ENCAPSULATED FUEL-BASED LIGHT WATER REACTOR CONCEPTS
The use of TRISO-particle-based dispersion fuel within SiC matrix and cladding materials has the potential to allow the design of extremely safe LWRs with failure-proof fuel. This paper examines the feasibility of LWR-like cycle length for such a low enriched uranium fuel with the imposed constraint of strictly retaining the original geometry of the fuel pins and assemblies. The motivation for retaining the original geometry is to provide the ability to incorporate the fuel 'as-is' into existing LWRs while retaining their thermal-hydraulic characteristics. The feasibility of using this fuel is assessed by looking at cycle lengths and fuel failure rates. Other considerations (e.g., safety parameters, etc.) were not considered at this stage of the study. The study includes the examination of different TRISO kernel diameters without changing the coating layer thicknesses. The study shows that a naive use of UO{sub 2} results in cycle lengths too short to be practical for existing LWR designs and operational demands. Increasing fissile inventory within the fuel compacts shows that acceptable cycle lengths can be achieved. In this study, starting with the recognized highest packing fraction practically achievable (44%), higher enrichment, larger fuel kernel sizes, and the use of higher density fuels have been …
Date:
April 1, 2012
Creator:
Sen, R. Sonat; Pope, Michael A.; Ougouag, Abderrafi M.; Pasamehmetoglu, Kemal & Venneri, Francesco
Object Type:
Article
System:
The UNT Digital Library
Assessment of the SRI Gasification Process for Syngas Generation with HTGR Integration -- White Paper
This white paper is intended to compare the technical and economic feasibility of syngas generation using the SRI gasification process coupled to several high-temperature gas-cooled reactors (HTGRs) with more traditional HTGR-integrated syngas generation techniques, including: (1) Gasification with high-temperature steam electrolysis (HTSE); (2) Steam methane reforming (SMR); and (3) Gasification with SMR with and without CO2 sequestration.
Date:
April 1, 2012
Creator:
Gandrik, A.M.
Object Type:
Report
System:
The UNT Digital Library
An Audit Report on Certification of the Permanent School Fund's Bond Guarantee Program for Fiscal Year 2011
Report of the Texas State Auditor's Office related to the total amount of school district bonds guaranteed by the Permanent School Fund's (Fund) Bond Guarantee Program (Program), whether these were within the limits established by Section 45.053(a) and (d) of the Texas Education Code and the Internal Revenue Service (IRS), and recent changes made to the Program's rules and statutes.
Date:
April 2012
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
An Audit Report on Selected Groundwater Conservation Districts
Report of the Texas State Auditor's Office related to determining whether selected groundwater conservation districts complied with applicable statutes and to summarizing information from districts' audited annual financial statements.
Date:
April 2012
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
Axial couplings and strong decay widths of heavy hadrons
We calculate the axial couplings of mesons and baryons containing a heavy quark in the static limit using lattice QCD. These couplings determine the leading interactions in heavy hadron chiral perturbation theory and are central quantities in heavy quark physics, as they control strong decay widths and the light-quark mass dependence of heavy hadron observables. Our analysis makes use of lattice data at six different pion masses, 227 MeV < m{sub {pi}} < 352 MeV, two lattice spacings, a = 0.085, 0.112 fm, and a volume of (2.7 fm){sup 3}. Our results for the axial couplings are g{sub 1} = 0.449(51), g{sub 2} = 0.84(20), and g{sub 3} = 0.71(13), where g{sub 1} governs the interaction between heavy-light mesons and pions and g{sub 2,3} are similar couplings between heavy-light baryons and pions. Using our lattice result for g{sub 3}, and constraining 1/m{sub Q} corrections in the strong decay widths with experimental data for {Sigma}{sub c}{sup (*)} decays, we obtain {Gamma}[{Sigma}{sub b}{sup (*)} {yields} {Lambda}{sub b} {pi}{sup {+-}}] = 4.2(1.0), 4.8(1.1), 7.3(1.6), 7.8(1.8) MeV for the {Sigma}{sub b}{sup +}, {Sigma}{sub b}{sup -}, {Sigma}{sub b}{sup *+}, {Sigma}{sub b}{sup *-} initial states, respectively. We also derive upper bounds on the widths of the …
Date:
April 1, 2012
Creator:
William Detmold, C.-J. David Lin, Stefan Meinel
Object Type:
Article
System:
The UNT Digital Library
Battery Electric Vehicle Driving and Charging Behavior Observed Early in The EV Project
As concern about society's dependence on petroleum-based transportation fuels increases, many see plug-in electric vehicles (PEV) as enablers to diversifying transportation energy sources. These vehicles, which include plug-in hybrid electric vehicles (PHEV), range-extended electric vehicles (EREV), and battery electric vehicles (BEV), draw some or all of their power from electricity stored in batteries, which are charged by the electric grid. In order for PEVs to be accepted by the mass market, electric charging infrastructure must also be deployed. Charging infrastructure must be safe, convenient, and financially sustainable. Additionally, electric utilities must be able to manage PEV charging demand on the electric grid. In the Fall of 2009, a large scale PEV infrastructure demonstration was launched to deploy an unprecedented number of PEVs and charging infrastructure. This demonstration, called The EV Project, is led by Electric Transportation Engineering Corporation (eTec) and funded by the U.S. Department of Energy. eTec is partnering with Nissan North America to deploy up to 4,700 Nissan Leaf BEVs and 11,210 charging units in five market areas in Arizona, California, Oregon, Tennessee, and Washington. With the assistance of the Idaho National Laboratory, eTec will collect and analyze data to characterize vehicle consumer driving and charging behavior, evaluate …
Date:
April 1, 2012
Creator:
Smart, John & Schey, Stephen
Object Type:
Article
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 92, No. 65, Ed. 1 Sunday, April 1, 2012
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
April 1, 2012
Creator:
Yanelli, Adam
Object Type:
Newspaper
System:
The Portal to Texas History
The Best Places to Work in Texas Are Mother- Friendly
This document is an endorsement for workplace friendly policies for mothers with newborns. It is promoted as good for families, workforce, and business.
Date:
April 2012
Creator:
Texas. Department of State Health Services.
Object Type:
Pamphlet
System:
The Portal to Texas History
BioMass PDU Electrical Design Study UPDATE
The BioMass Process Demonstration Unit (PDU) elect
Date:
April 1, 2012
Creator:
Gentle, Jake P.; Myers, Kurt S. & Baldwin, Thomas L.
Object Type:
Report
System:
The UNT Digital Library
Biomass Surface Characterization Laboratory (Fact Sheet)
This fact sheet provides information about Biomass Surface Characterization Laboratory capabilities and applications at NREL.
Date:
April 1, 2012
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Biomolecular Science (Fact Sheet)
A brief fact sheet about NREL Photobiology and Biomolecular Science. The research goal of NREL's Biomolecular Science is to enable cost-competitive advanced lignocellulosic biofuels production by understanding the science critical for overcoming biomass recalcitrance and developing new product and product intermediate pathways. NREL's Photobiology focuses on understanding the capture of solar energy in photosynthetic systems and its use in converting carbon dioxide and water directly into hydrogen and advanced biofuels.
Date:
April 1, 2012
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Building Diagnostic Market Deployment - Final Report
The work described in this report was done as part of a Cooperative Research and Development Agreement (CRADA) between the U.S. Department of Energy’s Pacific Northwest National Laboratory (PNNL) and KGS Building LLC (KGS). PNNL and KGS both believe that the widespread adoption of automated fault de4tection and diagnostic (AFDD) tools will result in significant reduction to energy and peak energy consumption. The report provides an introduction, and summary of the various tasks performed under the CRADA. The CRADA project had three major focus areas: 1) Technical Assistance for Whole Building Energy Diagnostician (WBE) Commercialization, 2) Market Transfer of the Outdoor Air/Economizer Diagnostician (OAE), and 3) Development and Deployment of Automated Diagnostics to Improve Large Commercial Building Operations.
Date:
April 1, 2012
Creator:
Katipamula, Srinivas & Gayeski, N.
Object Type:
Report
System:
The UNT Digital Library
C%2B%2B tensor toolbox user manual.
The C++ Tensor Toolbox is a software package for computing tensor decompositions. It is based on the Matlab Tensor Toolbox, and is particularly optimized for sparse data sets. This user manual briefly overviews tensor decomposition mathematics, software capabilities, and installation of the package. Tensors (also known as multidimensional arrays or N-way arrays) are used in a variety of applications ranging from chemometrics to network analysis. The Tensor Toolbox provides classes for manipulating dense, sparse, and structured tensors in C++. The Toolbox compiles into libraries and is intended for use with custom applications written by users.
Date:
April 1, 2012
Creator:
Plantenga, Todd D. & Kolda, Tamara Gibson
Object Type:
Report
System:
The UNT Digital Library
Carbon Nanosheets and Nanostructured Electrodes in Organic Photovoltaic Devices: Cooperative Research and Development Final Report, CRADA Number CRD-08-321
Carbon nanosheet thin films were employed as nanostructured electrodes in organic solar cells. Due to the nanostructured texture of the carbon nanosheet electrodes, there was an increase in performance over standard ITO electrodes with very thick active layers. ZnO deposited via atomic layer deposition (ALD) was used as a hole blocking layer to provide for carrier selectivity of the carbon nanosheets.
Date:
April 1, 2012
Creator:
Olson, D.
Object Type:
Report
System:
The UNT Digital Library
Children with Special Health Care Needs: Newsletter for Families, April 2012
Bilingual newsletter from the Texas Department of State Health Services providing information on health care for children with special needs, including resources for medical help and community services.
Date:
April 2012
Creator:
Texas. Department of Health.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
The Christian Chronicle (Oklahoma City, Okla.), Vol. 69, No. 4, Ed. 1 Sunday, April 1, 2012
Monthly newspaper from Oklahoma City, Oklahoma that includes news and information about the Churches of Christ along with advertising.
Date:
April 1, 2012
Creator:
McMillon, Lynn
Object Type:
Newspaper
System:
The Portal to Texas History
City Mixed Beverage Comparison Summary: First Quarter 2012
Quarterly report outlining tax revenues and remittances for alcoholic beverages, listed by city for January-March 2012. It also compares the statistics to the same period for the previous year.
Date:
April 2012
Creator:
Texas. Comptroller's Office.
Object Type:
Report
System:
The Portal to Texas History
Clean Air Status and Trends Network Annual Report: 2010
Annual report of the Clean Air Status and Trends Network (CASTNET) describing the program and data collection. It also presents information on air quality and recorded concentrations of pollutants such as ozone, sulfur, gases, and other elements of concern.
Date:
April 2012
Creator:
AMEC Environment & Infrastructure, Inc.
Object Type:
Report
System:
The UNT Digital Library
Clean Firetube Boiler Waterside Heat Transfer Surfaces, Energy Tips: STEAM, Steam Tip Sheet #7 (Fact Sheet)
A steam energy tip sheet for the Advanced Manufacturing Office (AMO). The prevention of scale formation in firetube boilers can result in substantial energy savings. Scale deposits occur when calcium, magnesium, and silica, commonly found in most water supplies, react to form a continuous layer of material on the waterside of the boiler heat exchange tubes. Scale creates a problem because it typically possesses a thermal conductivity, an order of magnitude less than the corresponding value for bare steel. Even thin layers of scale serve as an effective insulator and retard heat transfer. The result is overheating of boiler tube metal, tube failures, and loss of energy efficiency. Fuel consumption may increase by up to 5% in firetube boilers because of scale. The boilers steam production may be reduced if the firing rate cannot be increased to compensate for the decrease in combustion efficiency. Energy losses as a function of scale thickness and composition are given. Any scale in a boiler is undesirable. The best way to deal with scale is not to let it form in the first place. Prevent scale formation by: (1) Pretreating of boiler makeup water (using water softeners, demineralizers, and reverse osmosis to remove scale-forming …
Date:
April 1, 2012
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Commercialization of New Lattice-Matched Multi-Junction Solar Cells Based on Dilute Nitrides: July 8, 2010 - March 7, 2012
Final Technical Progress Report for PV Incubator subcontract NAT-0-99013-03. The overall objective of this Incubator subcontract was to complete the work necessary to make commercial ready solar cells using the dilute nitride technology. The specific objectives of this program were aimed at completing the development of a triple-junction solar cell that incorporates a GaInNAs {approx}1eV subcell to the point of commercial readiness, and determining the cell reliability and, if necessary, identifying and eliminating process or material related issues that lead to early-life cell failures. There were three major objectives for Phase 1, each of which focuses on a key element of the solar cell that determines its performance in a commercial CPV system. One objective was to optimize the quality and performance of the key individual components making up the solar cell structure and then to optimize the integration of these components into a complete triple-junction cell. A second objective was to design and test anti-reflective coating that maximizes the light coupled into a 3J cell with a {approx}1 eV bottom cell bandgap. The third objective was to develop Highly Accelerated Life Tests (HALT) protocols and tools for identifying and correcting potential reliability problems. The Phase 2 objectives were a …
Date:
April 1, 2012
Creator:
Herb, J.
Object Type:
Report
System:
The UNT Digital Library
Community Design and the Incidence of Crashes Involving Pedestrians and Motorists Aged 75 and Older
"This report studies a series of negative binomial regression models to understand how urban form may affect the incidence of total and killed-or-severely-injured (KSI) crashes involving older drivers and pedestrians."
Date:
April 2012
Creator:
Dumbaugh, Eric; Zhang, Yi & Li, Wenhao
Object Type:
Report
System:
The Portal to Texas History
Compilation of Results of Aquifer Tests in Texas
"The mission of the Texas Water Development Board's (TWDB) Groundwater Resources Division is to collect, interpret, and provide accurate, objective information on the groundwater resources of Texas. In support of this mission, the TWDB has undertaken a long-term process of mapping and characterizing the aquifers of Texas."
Date:
April 2012
Creator:
Wuerch, David Robert & Christian, Brent
Object Type:
Report
System:
The Portal to Texas History
COMPOSE-HPC: A Transformational Approach to Exascale
The goal of the COMPOSE-HPC project is to 'democratize' tools for automatic transformation of program source code so that it becomes tractable for the developers of scientific applications to create and use their own transformations reliably and safely. This paper describes our approach to this challenge, the creation of the KNOT tool chain, which includes tools for the creation of annotation languages to control the transformations (PAUL), to perform the transformations (ROTE), and optimization and code generation (BRAID), which can be used individually and in combination. We also provide examples of current and future uses of the KNOT tools, which include transforming code to use different programming models and environments, providing tests that can be used to detect errors in software or its execution, as well as composition of software written in different programming languages, or with different threading patterns.
Date:
April 1, 2012
Creator:
Bernholdt, David E; Allan, Benjamin A.; Armstrong, Robert C.; Chavarria-Miranda, Daniel; Dahlgren, Tamara L.; Elwasif, Wael R et al.
Object Type:
Report
System:
The UNT Digital Library
Comprehensive evaluation of compaction of asphalt pavements and development of compaction monitoring system
"This report aimed to conduct a comprehensive evaluation of compaction of asphalt pavements and develop software for monitoring field compaction in real time.The results were used to determine the effects of compaction temperature, compaction method, mixture design, and base type on the compactability of asphalt mixtures.Also in this report researchers developed a system for monitoring and documenting the compaction process of asphalt mixtures called compaction monitoring system (CMS)."
Date:
April 2012
Creator:
Kassem, Emad Abdel-Rahman, 1979-; Scullion, Tom; Masad, Eyad; Chowdhury, Arif; Liu, Wenting; Estakhri, Cindy K. et al.
Object Type:
Report
System:
The Portal to Texas History