A METHODOLOGY FOR DETERMINING THE DOSE RATE FOR BOUNDING MASS LIMITS IN A 9977 PACKAGING (open access)

A METHODOLOGY FOR DETERMINING THE DOSE RATE FOR BOUNDING MASS LIMITS IN A 9977 PACKAGING

The Small Gram Quantity (SGQ) concept is based on the understanding that the hazards associated with the shipment of a radioactive material are directly proportional to its mass. This study describes a methodology that estimates the acceptable masses for several neutron and gamma emitting isotopes that can be shipped in a 9977 Package compliant with the Title 10 of the Code of Federal Regulations, Part 71 (10CFR71) external radiation level limits. 10CFR71.33 states that a shipping application identifies the radioactive and fissile materials at their maximum quantity and provides an evaluation demonstrating compliance with the external radiation standards. Since rather small amounts of some isotopes emit sufficiently strong radiation to produce a large external dose rate, quantifying of the dose rate for a proposed content is a challenging issue for the SGQ approach. It is essential to quantify external radiation levels from several common gamma and neutron sources that can be safely placed in a specific packaging, to ensure compliance with federal regulations. A methodology was established for determining the dose rate for bounding mass limits for a set of isotopes in the Model 9977 Shipping Package. Calculations were performed to estimate external radiation levels using the MCNP radiation transport …
Date: May 24, 2012
Creator: Abramczyk, G.; Bellamy, S.; Nathan, S. & Loftin, B.
Object Type: Article
System: The UNT Digital Library
LETTER REPORT. INDEPENDENT CONFIRMATORY SURVEY RESULTS OF SOILS ASSOCIATED WITH THE ARGYLE STREET SEWER LINE AT THE UNITED NUCLEAR CORPORATION NAVAL PRODUCTS SITE, NEW HAVEN, CONNECTICUT (open access)

LETTER REPORT. INDEPENDENT CONFIRMATORY SURVEY RESULTS OF SOILS ASSOCIATED WITH THE ARGYLE STREET SEWER LINE AT THE UNITED NUCLEAR CORPORATION NAVAL PRODUCTS SITE, NEW HAVEN, CONNECTICUT

Oak Ridge Institute for Science and Education (ORISE) personnel visited the United Nuclear Corporation (UNC) Naval Products site on three separate occasions during the months of October and November 2011. The purpose of these visits was to conduct confirmatory surveys of soils associated with the Argyle Street sewer line that was being removed. Soil samples were collected from six different, judgmentally determined locations in the Argyle Street sewer trench. In addition to the six soil samples collected by ORISE, four replicate soil samples were collected by Cabrera Services, Inc. (CSI) for analysis by the ORISE laboratory. Replicate samples S0010 and S0011 were final status survey (FSS) bias samples; S0012 was an FSS systematic sample; and S0015 was a waste characterization sample. Six soil samples were also collected for background determination. Uranium-235 and uranium-238 concentrations were determined via gamma spectroscopy; the spectra were also reviewed for other identifiable photopeaks. Radionuclide concentrations for these soil samples are provided. In addition to the replicate samples and the samples collected by ORISE, CSI submitted three soil samples for inter-laboratory comparison analyses. One sample was from the background reference area, one was from waste characterization efforts (material inside the sewer line), and one was a …
Date: January 24, 2012
Creator: Adams, Wade C.
Object Type: Report
System: The UNT Digital Library
TORUS: Theory of Reactions for Unstable iSotopes Annual Continuation and Progress Report Year-2: March 1, 2011 - February 29, 2012 (open access)

TORUS: Theory of Reactions for Unstable iSotopes Annual Continuation and Progress Report Year-2: March 1, 2011 - February 29, 2012

The TORUS collaboration derives its name from the research it focuses on, namely the Theory of Reactions for Unstable iSotopes. It is a Topical Collaboration in Nuclear Theory, and funded by the Nuclear Theory Division of the Office of Nuclear Physics in the Office of Science of the Department of Energy. The funding supports one postdoctoral researcher for the years 1 through 3. The collaboration brings together as Principal Investigators a large fraction of the nuclear reaction theorists currently active within the USA. The mission of the TORUS Topical Collaboration is to develop new methods that will advance nuclear reaction theory for unstable isotopes by using three-body techniques to improve direct-reaction calculations, and, by using a new partial-fusion theory, to integrate descriptions of direct and compound-nucleus reactions. This multi-institution collaborative effort is directly relevant to three areas of interest: the properties of nuclei far from stability; microscopic studies of nuclear input parameters for astrophysics, and microscopic nuclear reaction theory.
Date: February 24, 2012
Creator: Arbanas, Goran; Elster, Charlotte; Escher, Jutta; Mukhamedzanov, Akram; Nunes, Filomena & Thompson, Ian J.
Object Type: Report
System: The UNT Digital Library
Issues in International Trade Law: Restricting Exports of Electronic Waste (open access)

Issues in International Trade Law: Restricting Exports of Electronic Waste

Electronic waste (e-waste) is a term that loosely refers to obsolete, broken, or irreparable electronic devices. Because e-waste is generated in high volumes in the United States and contains hazardous materials, it is a growing area of domestic concern. Currently, e-waste is essentially unregulated at the federal level and can be disposed of with common household garbage in municipal solid waste landfills or incinerators. Recently, momentum has developed for domestic legislation restricting U.S. e-waste exports. These restrictions could take many forms, including a partial or total ban on e-waste exports, an e-waste export licensing system, or a quota on e-waste exports. This report looks at how such legislation could affect and work with prior US disposal laws.
Date: February 24, 2012
Creator: Barbour, Emily C.
Object Type: Report
System: The UNT Digital Library
Energy Policy: Election Year Issues and Legislative Proposals (open access)

Energy Policy: Election Year Issues and Legislative Proposals

This report looks at how controversies stemming from various importance given to different aspects of United States energy policy affect the legislation on energy policy, particularly during election years.
Date: September 24, 2012
Creator: Behrens, Carl E.
Object Type: Report
System: The UNT Digital Library
Final Report (open access)

Final Report

This project combines outcrop-scale heterogeneity characterization, laboratory experiments, and numerical simulations. The study is designed to test whether established dispersion theory accurately predicts the behavior of solute transport through heterogeneous media and to investigate the relationship between heterogeneity and the parameters that populate these models. The dispersion theory tested by this work is based upon the fractional advection-dispersion equation (fADE) model. Unlike most dispersion studies that develop a solute transport model by fitting the solute transport breakthrough curve, this project will explore the nature of the heterogeneous media to better understand the connection between the model parameters and the aquifer heterogeneity. Our work at the Colorado School of Mines was focused on the following questions: 1) What are the effects of multi-scale geologic variability on transport of conservative and reactive solutes? 2) Can those transport effects be accounted for by classical methods, and if not, can the nonlocal fractional-order equations provide better predictions? 3) Can the fractional-order equations be parameterized through a link to some simple observable geologic features? 4) Are the classical equations of transport and reaction sufficient? 5) What is the effect of anomalous transport on chemical reaction in groundwater systems? The work is predicated on the observation …
Date: September 24, 2012
Creator: Benson, David A.
Object Type: Report
System: The UNT Digital Library
Final Report (open access)

Final Report

The overall objective is to create robust artificial protein modules as scaffolds to control both (a) the conformation of novel cofactors incorporated into the modules thereby making the modules possess a desired functionality and (b) the organization of these functional modules into ordered macroscopic ensembles, whose macroscopic materials properties derive from the designed microscopic function of the modules. We focus on two specific types of cofactors for imparting functionality in this project; primarily nonlinear optical (NLO) chromophores designed to exhibit extraordinary molecular hyperpolarizabilities, as well as donor-bridge-acceptor cofactors designed to exhibit highly efficient, 'through-bonds' light-induced electron transfer (LIET) over nano-scale distances. The ensembles range from 2-D to 3-D, designed to possess the degree of orientational and positional order necessary to optimize their macroscopic response, the latter ranging from liquid-crystalline or glass-like to long-range periodic. Computational techniques, firmly based in statistical thermodynamics, are utilized for the design the artificial protein modules, based on robust {alpha}-helical bundle motifs, necessarily incorporating the desired conformation, location, and environment of the cofactor. Importantly, this design approach also includes optimization of the interactions between the modules to promote their organization into ordered macroscopic ensembles in 2-D and 3-D via either directed-assembly or self-assembly. When long-range periodic …
Date: May 24, 2012
Creator: Blasie, J. K.; DeGrado, W.F.; Saven, J.G. & Therien, M.J.
Object Type: Report
System: The UNT Digital Library
Femtosecond Synchronization of Laser Systems for the LCLS (open access)

Femtosecond Synchronization of Laser Systems for the LCLS

The scientific potential of femtosecond x-ray pulses at linac-driven free-electron lasers such as the Linac Coherent Light Source is tremendous. Time-resolved pump-probe experiments require a measure of the relative arrival time of each x-ray pulse with respect to the experimental pump laser. An optical timing system based on stabilized fiber links has been developed for the LCLS to provide this synchronization. Preliminary results show synchronization of the installed stabilized links at the sub-20-femtosecond level. We present details of the implementation at LCLS and potential for future development.
Date: August 24, 2012
Creator: Byrd, John; Doolittle, Lawrence; Huang, Gang; Staples, John; Wilcox, Russell; Arthur, John et al.
Object Type: Article
System: The UNT Digital Library
Geochemical and Strontium Isotope Characterization of Produced Waters from Marcellus Shale Natural Gas Extraction (open access)

Geochemical and Strontium Isotope Characterization of Produced Waters from Marcellus Shale Natural Gas Extraction

Extraction of natural gas by hydraulic fracturing of the Middle Devonian Marcellus Shale, a major gas-bearing unit in the Appalachian Basin, results in significant quantities of produced water containing high total dissolved solids (TDS). We carried out a strontium (Sr) isotope investigation to determine the utility of Sr isotopes in identifying and quantifying the interaction of Marcellus Formation produced waters with other waters in the Appalachian Basin in the event of an accidental release, and to provide information about the source of the dissolved solids. Strontium isotopic ratios of Marcellus produced waters collected over a geographic range of ∼375 km from southwestern to northeastern Pennsylvania define a relatively narrow set of values (εSr SW = +13.8 to +41.6, where εSr SW is the deviation of the 87Sr/86Sr ratio from that of seawater in parts per 104); this isotopic range falls above that of Middle Devonian seawater, and is distinct from most western Pennsylvania acid mine drainage and Upper Devonian Venango Group oil and gas brines. The uniformity of the isotope ratios suggests a basin-wide source of dissolved solids with a component that is more radiogenic than seawater. Mixing models indicate that Sr isotope ratios can be used to sensitively differentiate …
Date: February 24, 2012
Creator: Chapman, Elizabeth C.; Capo, Rosemary. C.; Stewart, Brian W.; Kirby, Carl S.; Hammack, Richard W.; Schroeder, Karl T. et al.
Object Type: Article
System: The UNT Digital Library
Japan's Possible Entry Into the Trans-Pacific Partnership and Its Implications (open access)

Japan's Possible Entry Into the Trans-Pacific Partnership and Its Implications

This report discusses the effects of the possible entry of Japan to the Trans-Pacific Partnership (TPP) negotiations. The TPP issue presents both risks and opportunities for the United States and Japan. On the one hand, it could reinvigorate an economic relationship that has remained steady but stagnant, by forcing the two countries to address long-standing, difficult issues, and allowing them to raise their relationship to a higher level. On the other hand, failure to do so could indicate that the underlying problems are too fundamental to overcome and could set back the relationship.
Date: August 24, 2012
Creator: Cooper, William H. & Manyin, Mark E.
Object Type: Report
System: The UNT Digital Library
An Overview of Tax Provisions Expiring in 2012 (open access)

An Overview of Tax Provisions Expiring in 2012

A number of tax provisions have either expired at the end of 2011 or are scheduled to expire at the end of this year. This report provides an overview of these expiring provisions.
Date: September 24, 2012
Creator: Crandall-Hollick, Margot L.
Object Type: Report
System: The UNT Digital Library
Medicare Primer (open access)

Medicare Primer

This report provides an overview of Medicare, the nation's federal insurance program, which pays for covered health care services of qualified beneficiaries.
Date: April 24, 2012
Creator: Davis, Patricia A.; Binder, Cliff; Hahn, Jim; Morgan, Paulette C.; Mulvey, Janemarie; Talaga, Scott R. et al.
Object Type: Report
System: The UNT Digital Library
Photonic Doppler Velocimetry Multiplexing Techniques: Evaluation of Photonic Techniques (open access)

Photonic Doppler Velocimetry Multiplexing Techniques: Evaluation of Photonic Techniques

This poster reports progress related to photonic technologies. Specifically, the authors developed diagnostic system architecture for a Multiplexed Photonic Doppler Velocimetry (MPDV) that incorporates frequency and time-division multiplexing into existing PDV methodology to provide increased channel count. Current MPDV design increases number of data records per digitizer channel 8x, and also operates as a laser-safe (Class 3a) system. Further, they applied heterodyne interferometry to allow for direction-of-travel determination and enable high-velocity measurements (>10 km/s) via optical downshifting. They also leveraged commercially available, inexpensive and robust components originally developed for telecom applications. Proposed MPDV architectures employ only commercially available, fiber-coupled hardware.
Date: May 24, 2012
Creator: Daykin, Edward
Object Type: Article
System: The UNT Digital Library
Modular control of fusion power heating applications (open access)

Modular control of fusion power heating applications

This work is motivated by the growing demand for auxiliary heating on small and large machines worldwide. Numerous present and planned RF experiments (EBW, Lower Hybrid, ICRF, and ECH) are increasingly complex systems. The operational challenges are indicative of a need for components of real-time control that can be implemented with a moderate amount of effort in a time- and cost-effective fashion. Such a system will improve experimental efficiency, enhance experimental quality, and expedite technological advancements. The modular architecture of this control-suite serves multiple purposes. It facilitates construction on various scales from single to multiple controller systems. It enables expandability of control from basic to complex via the addition of modules with varying functionalities. It simplifies the control implementation process by reducing layers of software and electronic development. While conceived with fusion applications in mind, this suite has the potential to serve a broad range of scientific and industrial applications. During the Phase-I research effort we established the overall feasibility of this modular control-suite concept. We developed the fundamental modules needed to implement open-loop active-control and demonstrated their use on a microwave power deposition experiment.
Date: August 24, 2012
Creator: Demers, D. R.
Object Type: Report
System: The UNT Digital Library
Unfunded Mandates Reform Act: History, Impact, and Issues (open access)

Unfunded Mandates Reform Act: History, Impact, and Issues

This report examines debates regarding what constitutes an "unfunded federal mandate" and the Unfunded Mandates Reform Act of 1995's (UMRA) implementation. It focuses on UMRA's requirement that the Congressional Budget Office (CBO) issue written cost estimate statements for federal mandates in legislation, its procedures for raising points of order in the House and Senate concerning unfunded federal mandates in legislation, and its requirement that federal agencies prepare written cost estimate statements for federal mandates in rules. It also assesses UMRA's impact on federal mandates and arguments concerning UMRA's future, focusing on UMRA's definitions, exclusions, and exceptions which currently exempt many federal actions with potentially significant financial impacts on nonfederal entities.
Date: April 24, 2012
Creator: Dilger, Robert Jay & Beth, Richard S.
Object Type: Report
System: The UNT Digital Library
Crime Victims' Rights Act: A Sketch of 18 U.S.C. 3771 (open access)

Crime Victims' Rights Act: A Sketch of 18 U.S.C. 3771

An abridgement of CRS RL 33679, covering the rights to notice, attendance, and participation in the federal criminal justice process. It covers amendments that became active in December, 2008.
Date: April 24, 2012
Creator: Doyle, Charles
Object Type: Report
System: The UNT Digital Library
Crime Victims' Rights Act: A Summary and Legal Analysis of 18 U.S.C. 3771 (open access)

Crime Victims' Rights Act: A Summary and Legal Analysis of 18 U.S.C. 3771

An overview of rights afforded to federal crime victims. The report describes who qualifies for these rights and follows with a description of the rights.
Date: April 24, 2012
Creator: Doyle, Charles
Object Type: Report
System: The UNT Digital Library
Internet Gambling: An Abridged Overview of Federal Criminal Law (open access)

Internet Gambling: An Abridged Overview of Federal Criminal Law

None
Date: January 24, 2012
Creator: Doyle, Charles
Object Type: Report
System: The UNT Digital Library
Internet Gambling: An Overview of Federal Criminal Law (open access)

Internet Gambling: An Overview of Federal Criminal Law

This report provides an overview of the federal criminal law on internet gambling. It includes the citations to sate and federal gambling laws and the text of the statutes.
Date: January 24, 2012
Creator: Doyle, Charles
Object Type: Report
System: The UNT Digital Library
FINAL TECHNICAL REPORT (open access)

FINAL TECHNICAL REPORT

The United States has abundant wind resources, such that only about 3% of the resource would need to be developed to achieve the goal of producing 20% of electricity in the United States by 2030. Inappropriately sited wind development may result in conflicts with wildlife that can delay or derail development projects, increase projects costs, and may degrade important conservation values. The most cost-effective approach to reducing such conflicts is through landscape-scale siting early in project development. To support landscape scale siting that avoids sensitive areas for wildlife, we compiled a database on species distributions, wind resource, disturbed areas, and land ownership. This database can be viewed and obtained via http://wind.tnc.org/awwi. Wind project developers can use this web tool to identify potentially sensitive areas and areas that are already disturbed and are therefore likely to be less sensitive to additional impacts from wind development. The United States goal of producing 20% of its electricity from wind energy by the year 2030 would require 241 GW of terrestrial nameplate capacity. We analyzed whether this goal could be met by using lands that are already disturbed, which would minimize impacts to wildlife. Our research shows that over 14 times the DOE goal …
Date: February 24, 2012
Creator: Fargione, Joseph
Object Type: Report
System: The UNT Digital Library
Final Technical Report - Advanced Optical Sensors to Minimize Energy Consumption in Polymer Extrusion Processes (open access)

Final Technical Report - Advanced Optical Sensors to Minimize Energy Consumption in Polymer Extrusion Processes

Project Objective: The objectives of this study are to develop an accurate and stable on-line sensor system to monitor color and composition on-line in polymer melts, to develop a scheme for using the output to control extruders to eliminate the energy, material and operational costs of off-specification product, and to combine or eliminate some extrusion processes. Background: Polymer extrusion processes are difficult to control because the quality achieved in the final product is complexly affected by the properties of the extruder screw, speed of extrusion, temperature, polymer composition, strength and dispersion properties of additives, and feeder system properties. Extruder systems are engineered to be highly reproducible so that when the correct settings to produce a particular product are found, that product can be reliably produced time after time. However market conditions often require changes in the final product, different products or grades may be processed in the same equipment, and feed materials vary from lot to lot. All of these changes require empirical adjustment of extruder settings to produce a product meeting specifications. Optical sensor systems that can continuously monitor the composition and color of the extruded polymer could detect process upsets, drift, blending oscillations, and changes in dispersion of …
Date: July 24, 2012
Creator: Foulk, Susan J.
Object Type: Report
System: The UNT Digital Library
Solar-thermal Water Splitting Using the Sodium Manganese Oxide Process & Preliminary H2A Analysis (open access)

Solar-thermal Water Splitting Using the Sodium Manganese Oxide Process & Preliminary H2A Analysis

There are three primary reactions in the sodium manganese oxide high temperature water splitting cycle. In the first reaction, Mn2O3 is decomposed to MnO at 1,500°C and 50 psig. This reaction occurs in a high temperature solar reactor and has a heat of reaction of 173,212 J/mol. Hydrogen is produced in the next step of this cycle. This step occurs at 700°C and 1 atm in the presence of sodium hydroxide. Finally, water is added in the hydrolysis step, which removes NaOH and regenerates the original reactant, Mn2O3. The high temperature solar‐driven step for decomposing Mn2O3 to MnO can be carried out to high conversion without major complication in an inert environment. The second step to produce H2 in the presence of sodium hydroxide is also straightforward and can be completed. The third step, the low temperature step to recover the sodium hydroxide is the most difficult. The amount of energy required to essentially distill water to recover sodium hydroxide is prohibitive and too costly. Methods must be found for lower cost recovery. This report provides information on the use of ZnO as an additive to improve the recovery of sodium hydroxide.
Date: October 24, 2012
Creator: Francis, Todd M.; Lichty, Paul R.; Perkins, Christopher; Tucker, Melinda; Kreider, Peter B.; Funke, Hans H. et al.
Object Type: Report
System: The UNT Digital Library
The First Angstrom X-Ray Free-Electron Laser (open access)

The First Angstrom X-Ray Free-Electron Laser

The Linac Coherent Light Source produced its first x-ray laser beam on 10 April 2009. Today it is routinely producing x-ray pulses with energy >2 mJ across the operating range from 820-8,200 eV. The facility has begun operating for atomic/molecular/optical science experiments. Performance of the facility in its first user run (1 October - 21 December) and current machine development activities will be presented. Early results from the preparations for the start of the second user run is also reported.
Date: August 24, 2012
Creator: Galayda, John
Object Type: Article
System: The UNT Digital Library
Status Update of the Power Conditioning System in the National Ignition Facility (open access)

Status Update of the Power Conditioning System in the National Ignition Facility

None
Date: May 24, 2012
Creator: Galloudec, B. L.; Arnold, P.; James, G.; Pendleton, D.; Petersen, D.; Arellano-Womack, G. et al.
Object Type: Article
System: The UNT Digital Library