The European Union: Questions and Answers (open access)

The European Union: Questions and Answers

This report provides a brief overview of the European Union (EU), an economic and political partnership between 27 sovereign member states. The report describes the formation of the EU, the three main institutions of the EU, and the EU's relationship with the United States.
Date: July 31, 2014
Creator: Archick, Kristin
Object Type: Report
System: The UNT Digital Library
Shock compression of precompressed deuterium (open access)

Shock compression of precompressed deuterium

Here we report quasi-isentropic dynamic compression and thermodynamic characterization of solid, precompressed deuterium over an ultrafast time scale (< 100 ps) and a microscopic length scale (< 1 {micro}m). We further report a fast transition in shock wave compressed solid deuterium that is consistent with the ramp to shock transition, with a time scale of less than 10 ps. These results suggest that high-density dynamic compression of hydrogen may be possible on microscopic length scales.
Date: July 31, 2011
Creator: Armstrong, M R; Crowhurst, J C; Zaug, J M; Bastea, S; Goncharov, A F & Militzer, B
Object Type: Article
System: The UNT Digital Library
TRITIUM UNCERTAINTY ANALYSIS FOR SURFACE WATER SAMPLES AT THE SAVANNAH RIVER SITE (open access)

TRITIUM UNCERTAINTY ANALYSIS FOR SURFACE WATER SAMPLES AT THE SAVANNAH RIVER SITE

Radiochemical analyses of surface water samples, in the framework of Environmental Monitoring, have associated uncertainties for the radioisotopic results reported. These uncertainty analyses pertain to the tritium results from surface water samples collected at five locations on the Savannah River near the U.S. Department of Energy's Savannah River Site (SRS). Uncertainties can result from the field-sampling routine, can be incurred during transport due to the physical properties of the sample, from equipment limitations, and from the measurement instrumentation used. The uncertainty reported by the SRS in their Annual Site Environmental Report currently considers only the counting uncertainty in the measurements, which is the standard reporting protocol for radioanalytical chemistry results. The focus of this work is to provide an overview of all uncertainty components associated with SRS tritium measurements, estimate the total uncertainty according to ISO 17025, and to propose additional experiments to verify some of the estimated uncertainties. The main uncertainty components discovered and investigated in this paper are tritium absorption or desorption in the sample container, HTO/H{sub 2}O isotopic effect during distillation, pipette volume, and tritium standard uncertainty. The goal is to quantify these uncertainties and to establish a combined uncertainty in order to increase the scientific depth …
Date: July 31, 2012
Creator: Atkinson, R.
Object Type: Book
System: The UNT Digital Library
Results For The Second Quarter 2013 Tank 50 WAC Slurry Sample: Chemical And Radionuclide Contaminants (open access)

Results For The Second Quarter 2013 Tank 50 WAC Slurry Sample: Chemical And Radionuclide Contaminants

This report details the chemical and radionuclide contaminant results for the characterization of the 2013 Second Quarter sampling of Tank 50 for the Saltstone Waste Acceptance Criteria (WAC) in effect at that time. Information from this characterization will be used by Saltstone Facility Engineering (SFE) to support the transfer of low-level aqueous waste from Tank 50 to the Salt Feed Tank in the Saltstone Facility in Z-Area, where the waste will be immobilized. This information is also used to update the Tank 50 Waste Characterization System.
Date: July 31, 2013
Creator: Bannochie, Christopher J.
Object Type: Report
System: The UNT Digital Library
NATO: Response to the Crisis in Ukraine and Security Concerns in Central and Eastern Europe (open access)

NATO: Response to the Crisis in Ukraine and Security Concerns in Central and Eastern Europe

This report addresses the NATO and U.S. military response to the crisis in Ukraine. It does not discuss political, economic, or energy policy responses.
Date: July 31, 2014
Creator: Belkin, Paul; Mix, Derek E. & Woehrel, Steven
Object Type: Report
System: The UNT Digital Library
American Recovery & Reinvestment Act: Fuel Cell Hybrid Power Packs and Hydrogen Refueling for Lift Trucks (open access)

American Recovery & Reinvestment Act: Fuel Cell Hybrid Power Packs and Hydrogen Refueling for Lift Trucks

HEB Grocery Company, Inc. (H-E-B) is a privately-held supermarket chain with 310 stores throughout Texas and northern Mexico. H-E-B converted 14 of its lift reach trucks to fuel cell power using Nuvera Fuel Cells’ PowerEdge™ units to verify the value proposition and environmental benefits associated with the technology. Issues associated with the increasing power requirements of the distribution center operation, along with high ambient temperature in the summer and other operating conditions (such as air quality and floor surface condition), surfaced opportunities for improving Nuvera’s PowerEdge fuel cell system design in high-throughput forklift environments. The project included on-site generation of hydrogen from a steam methane reformer, called PowerTap™ manufactured by Nuvera. The hydrogen was generated, compressed and stored in equipment located outside H-E-B’s facility, and provided to the forklifts by hydrogen dispensers located in high forklift traffic areas. The PowerEdge fuel cell units logged over 25,300 operating hours over the course of the two-year project period. The PowerTap hydrogen generator produced more than 11,100 kg of hydrogen over the same period. Hydrogen availability at the pump was 99.9%. H-E-B management has determined that fuel cell forklifts help alleviate several issues in its distribution centers, including truck operator downtime associated with …
Date: July 31, 2011
Creator: Block, Gus
Object Type: Report
System: The UNT Digital Library
Test Loop Demonstration and Evaluation of Slurry Transfer Line Critical Velocity Measurement Instruments (open access)

Test Loop Demonstration and Evaluation of Slurry Transfer Line Critical Velocity Measurement Instruments

This report presents the results of the evaluation of three ultrasonic sensors for detecting critical velocity during slurry transfer between the Hanford tank farms and the WTP.
Date: July 31, 2010
Creator: Bontha, Jagannadha R.; Jenks, Jeromy WJ; Morgen, Gerald P.; Peters, Timothy J.; Wilcox, Wayne A.; Adkins, Harold E. et al.
Object Type: Report
System: The UNT Digital Library
District of Columbia: A Brief Review of Provisions in District of Columbia Appropriations Acts Restricting the Funding of Abortion Services (open access)

District of Columbia: A Brief Review of Provisions in District of Columbia Appropriations Acts Restricting the Funding of Abortion Services

This report provides A Brief Review of Provisions in District of Columbia Appropriations Acts Restricting the Funding of Abortion Services in the District of Columbia.
Date: July 31, 2012
Creator: Boyd, Eugene
Object Type: Report
System: The UNT Digital Library
The Renewable Fuel Standard (RFS): An Overview (open access)

The Renewable Fuel Standard (RFS): An Overview

This report provides a basic description of the RFS, including some of the widely discussed policy issues related to it.
Date: July 31, 2018
Creator: Bracmort, Kelsi
Object Type: Report
System: The UNT Digital Library
City of Klamath Falls, Oregon Geothermal Power Plant Feasibility Study (open access)

City of Klamath Falls, Oregon Geothermal Power Plant Feasibility Study

The purpose of the Klamath Falls project is to demonstrate the effectiveness of a combined thermal distribution system and power generation facility. The city of Klamath Falls operates a geothermal district heating system which would appear to be an attractive opportunity to install a power generation system. Since the two wells have operated reliably and consistently over many years, no new sources or resource exploration would be necessary. It appears that it will cost more to construct, operate, maintain and amortize a proposed geothermal facility than the long?term value of the power it would produce. The success of a future project will be determined by whether utility power production costs will remain low and whether costs of construction, operations, or financing may be reduced. There are areas that it would be possible to reduce construction cost. More detailed design could enable the city to obtain more precise quotes for components and construction, resulting in reduction in contingency projections. The current level of the contingency for uncertainty of costs is between $200,000 and $300,000. Another key issue with this project appears to be operation cost. While it is expected that only minimal routine monitoring and operating expenses will occur, the cost …
Date: July 31, 2011
Creator: Brian Brown, PE & Stephen Anderson, PE, Bety Riley
Object Type: Report
System: The UNT Digital Library
Detroit Commuter Hydrogen Project (open access)

Detroit Commuter Hydrogen Project

This project was undertaken to demonstrate the viability of using hydrogen as a fuel in an internal combustion engine vehicle for use as a part of a mass transit system. The advantages of hydrogen as a fuel include renew-ability, minimal environmental impact on air quality and the environment, and potential to reduce dependence on foreign energy sources for the transportation sector. Recognizing the potential for the hydrogen fuel concept, the Southeast Michigan Congress of Governments (SEMCOG) determined to consider it in the study of a proposed regional mass transit rail system for southeast Michigan. SEMCOG wanted to evaluate the feasibility of using hydrogen fueled internal combustion engine (H2ICE) vehicles in shuttle buses to connect the Detroit Metro Airport to a proposed, nearby rail station. Shuttle buses are in current use on the airport for passenger parking and inter-terminal transport. This duty cycle is well suited to the application of hydrogen fuel at this time because of the ability to re-fuel vehicles at a single nearby facility, overcoming the challenge of restricted fuel availability in the undeveloped hydrogen fuel infrastructure. A cooperative agreement between SEMCOG and the DOE was initiated and two H2ICE buses were placed in regular passenger service on …
Date: July 31, 2010
Creator: Brooks, Jerry & Prebo, Brendan
Object Type: Report
System: The UNT Digital Library
The World Trade Organization (WTO): U.S. Participation at Risk? (open access)

The World Trade Organization (WTO): U.S. Participation at Risk?

This report discusses the possibility that the U.S. will withdraw from the World Trade Organization (WTO), after the Trump Administration expressed doubt over its value to the U.S. economy.
Date: July 31, 2018
Creator: Cimino-Isaacs, Cathleen D.
Object Type: Report
System: The UNT Digital Library
The Help America Vote Act and Election Administration: Overview and Issues (open access)

The Help America Vote Act and Election Administration: Overview and Issues

This report discusses the Help America Vote Act (HAVA; P.L. 107-252) enacted in 2002. It provides background information about HAVA and its provisions, the Election Assistance Commission (EAC), funding for the agency and for state programs to improve elections, and a number of enduring election administration issues.
Date: July 31, 2014
Creator: Coleman, Kevin J. & Fischer, Eric A.
Object Type: Report
System: The UNT Digital Library
U.S.-Africa Leaders Summit: Frequently Asked Questions and Background (open access)

U.S.-Africa Leaders Summit: Frequently Asked Questions and Background

This report provides information about the early August 2014 U.S.-Africa Leaders Summit in Washington, DC, and policy issues likely to be addressed by participants in the summit and other events being held in conjunction with it.
Date: July 31, 2014
Creator: Cook, Nicolas; Arieff, Alexis; Blanchard, Lauren P. & Williams, Brock R.
Object Type: Report
System: The UNT Digital Library
Transport and Installation of the Dark Energy Survey CCD Imager (open access)

Transport and Installation of the Dark Energy Survey CCD Imager

None
Date: July 31, 2012
Creator: Derylo, Greg; Chi, Edward; Diehl, H.Thomas; Estrada, Juan; Flaugher, Brenna & Schultz, Ken
Object Type: Article
System: The UNT Digital Library
National Security Letters in Foreign Intelligence Investigations: A Glimpse at the Legal Background (open access)

National Security Letters in Foreign Intelligence Investigations: A Glimpse at the Legal Background

This report discusses the USA PATRIOT Act (107-56) and its expanded authority to issue national security letters (NSLs). A report by the Department of Justice's Inspector General (IG) found that in its pre-amendment use of expanded USA PATRIOT Act authority the FBI had "used NSLs in violation of applicable NSL statutes, Attorney General Guidelines, and internal FBI policies," but that no criminal laws had been broken.
Date: July 31, 2015
Creator: Doyle, Charles
Object Type: Report
System: The UNT Digital Library
Statics and Dynamics of Dimensionally and Spatially Constrained Oxides. Summary Progress Report Submitted to Department of Energy Basic Energy Science Division. Division of Materials Science & Engineering. (open access)

Statics and Dynamics of Dimensionally and Spatially Constrained Oxides. Summary Progress Report Submitted to Department of Energy Basic Energy Science Division. Division of Materials Science & Engineering.

Work is reported on nanopatterning of ceramic oxides; microstructure tailoring, control and versatility of nanopatterned oxides; and characterization and localized properties of nanopatterned oxides.
Date: July 31, 2010
Creator: Dravid, Vinayak P.
Object Type: Report
System: The UNT Digital Library
Neutron Production Using a Pyroelectric Driven Target Coupled with a Gated Field Ionization Source (open access)

Neutron Production Using a Pyroelectric Driven Target Coupled with a Gated Field Ionization Source

None
Date: July 31, 2012
Creator: Ellsworth, J L; Tang, V; Falabella, S; Naranjo, B & Putterman, S
Object Type: Article
System: The UNT Digital Library
Selective Extraction of Uranium from Liquid or Supercritical Carbon Dioxide (open access)

Selective Extraction of Uranium from Liquid or Supercritical Carbon Dioxide

Current liquid-liquid extraction processes used in recycling irradiated nuclear fuel rely on (1) strong nitric acid to dissolve uranium oxide fuel, and (2) the use of aliphatic hydrocarbons as a diluent in formulating the solvent used to extract uranium. The nitric acid dissolution process is not selective. It dissolves virtually the entire fuel meat which complicates the uranium extraction process. In addition, a solvent washing process is used to remove TBP degradation products, which adds complexity to the recycling plant and increases the overall plant footprint and cost. A liquid or supercritical carbon dioxide (l/sc -CO2) system was designed to mitigate these problems. Indeed, TBP nitric acid complexes are highly soluble in l/sc -CO2 and are capable of extracting uranium directly from UO2, UO3 and U3O8 powders. This eliminates the need for total acid dissolution of the irradiated fuel. Furthermore, since CO2 is easily recycled by evaporation at room temperature and pressure, it eliminates the complex solvent washing process. In this report, we demonstrate: (1) A reprocessing scheme starting with the selective extraction of uranium from solid uranium oxides into a TBP-HNO3 loaded Sc-CO2 phase, (2) Back extraction of uranium into an aqueous phase, and (3) Conversion of recovered purified …
Date: July 31, 2012
Creator: Farawila, Anne F.; O'Hara, Matthew J.; Wai, Chien M.; Taylor, Harry Z. & Liao, Yu-Jung
Object Type: Report
System: The UNT Digital Library
Fetal Tissue Research: Frequently Asked Questions (open access)

Fetal Tissue Research: Frequently Asked Questions

None
Date: July 31, 2015
Creator: Finklea, Kristin M.; Jansen, Don J.; Johnson, Judith A.; Panangala, Sidath Viranga; Redhead, C. Stephen; Reyes-Akinbileje, Bernice et al.
Object Type: Report
System: The UNT Digital Library
DESIGN & FABRICATION OF A PRECISION PULSED VALVE SYSTEM FOR NEUTRON IMAGING (open access)

DESIGN & FABRICATION OF A PRECISION PULSED VALVE SYSTEM FOR NEUTRON IMAGING

None
Date: July 31, 2011
Creator: Fitsos, P; Edson, S; Hall, J & Rusnak, B
Object Type: Article
System: The UNT Digital Library
Drought in the United States: Causes and Issues for Congress (open access)

Drought in the United States: Causes and Issues for Congress

This report provides information about the Causes and Issues for Congress on Drought in the United States. Drought has extended across two-thirds of the United States and had adversely affected agricultural producers.
Date: July 31, 2012
Creator: Folger, Peter; Cody, Betsy A. & Carter, Nicole T.
Object Type: Report
System: The UNT Digital Library
EVALUATION OF ALTERNATIVE FILTER MEDIA FOR THE ROTARY MICROFILTER, PHASE 2 (open access)

EVALUATION OF ALTERNATIVE FILTER MEDIA FOR THE ROTARY MICROFILTER, PHASE 2

Testing was conducted at the Savannah River National Laboratory (SRNL) to investigate filter membrane performance in an effort to increase rotary microfilter (RMF) throughput. Membranes were tested in the SpinTek Filtration, Inc. Static Test Cell (STC), which permitted quick and easy testing of several different membranes. Testing consisted of 100 hours tests with two different slurry feeds, based on recommendations from the phase 1 testing. One feed contained Monosodium Titanate (MST) solids in a simulated salt solution. The other feed contained simulated sludge batch 6 (SB6) solids in a simulated salt solution. Five membranes were tested, one each from filter manufactures Pall and Porvair and three from the Oak Ridge National Laboratory (ORNL). The membrane from Pall is the current membrane used on the latest generation RMF. The Porvair membrane performed well in previous STC tests as well as one of the ORNL membranes. The other two membranes from ORNL were recently developed and not available for the previous STC test. The results indicate that the Porvair filter performed best with the MST slurry and the ORNL SVB6-1B filter performed best with the SB6 slurry. Difficulty was encountered with the ORNL filters due to their dimensional thickness, which was greater …
Date: July 31, 2012
Creator: Fowley, M.
Object Type: Report
System: The UNT Digital Library
Three-Dimensional Composite Nanostructures for Lean NOx Emission Control (open access)

Three-Dimensional Composite Nanostructures for Lean NOx Emission Control

This final report to the Department of Energy (DOE) and National Energy Technology Laboratory (NETL) for DE-EE0000210 covers the period from October 1, 2009 to July 31, 2013. Under this project, DOE awarded UConn about $1,248,242 to conduct the research and development on a new class of 3D composite nanostructure based catalysts for lean NOx emission control. Much of the material presented here has already been submitted to DOE/NETL in quarterly technical reports. In this project, through a scalable solution process, we have successfully fabricated a new class of catalytic reactors, i.e., the composite nanostructure array (nano-array) based catalytic converters. These nanocatalysts, distinct from traditional powder washcoat based catalytic converters, directly integrate monolithic substrates together with nanostructures with well-defined size and shape during the scalable hydrothermal process. The new monolithic nanocatalysts are demonstrated to be able to save raw materials including Pt-group metals and support metal oxides by an order of magnitude, while perform well at various oxidation (e.g., CO oxidation and NO oxidation) and reduction reactions (H{sub 2} reduction of NOx) involved in the lean NOx emissions. The size, shape and arrangement of the composite nanostructures within the monolithic substrates are found to be the key in enabling the …
Date: July 31, 2013
Creator: Gao, Pu-Xian
Object Type: Report
System: The UNT Digital Library