Fielding the magnetically applied pressure-shear technique on the Z accelerator (completion report for MRT 4519). (open access)

Fielding the magnetically applied pressure-shear technique on the Z accelerator (completion report for MRT 4519).

The recently developed Magnetically Applied Pressure-Shear (MAPS) experimental technique to measure material shear strength at high pressures on magneto-hydrodynamic (MHD) drive pulsed power platforms was fielded on August 16, 2013 on shot Z2544 utilizing hardware set A0283A. Several technical and engineering challenges were overcome in the process leading to the attempt to measure the dynamic strength of NNSA Ta at 50 GPa. The MAPS technique relies on the ability to apply an external magnetic field properly aligned and time correlated with the MHD pulse. The load design had to be modified to accommodate the external field coils and additional support was required to manage stresses from the pulsed magnets. Further, this represents the first time transverse velocity interferometry has been applied to diagnose a shot at Z. All subsystems performed well with only minor issues related to the new feed design which can be easily addressed by modifying the current pulse shape. Despite the success of each new component, the experiment failed to measure strength in the samples due to spallation failure, most likely in the diamond anvils. To address this issue, hydrocode simulations are being used to evaluate a modified design using LiF windows to minimize tension in the …
Date: September 1, 2013
Creator: Alexander, C. Scott; Haill, Thomas A.; Dalton, Devon Gardner; Rovang, Dean Curtis & Lamppa, Derek C.
System: The UNT Digital Library
Compatibility Study for Plastic, Elastomeric, and Metallic Fueling Infrastructure Materials Exposed to Aggressive Formulations of Isobutanol-blended Gasoline (open access)

Compatibility Study for Plastic, Elastomeric, and Metallic Fueling Infrastructure Materials Exposed to Aggressive Formulations of Isobutanol-blended Gasoline

This report talks about Compatibility Study for Plastic, Elastomeric, and Metallic Fueling Infrastructure Materials Exposed to Aggressive Formulations of Isobutanol-blended Gasoline
Date: September 1, 2013
Creator: Kass, Michael D.; Janke, Christopher James; Pawel, Steven J.; Thomson, Jeffery K.; Meyer, Harry M., III & Theiss, Timothy J.
System: The UNT Digital Library
The Role of Occupant Behavior in Achieving Net Zero Energy: A Demonstration Project at Fort Carson (open access)

The Role of Occupant Behavior in Achieving Net Zero Energy: A Demonstration Project at Fort Carson

This study, sponsored by the U.S. General Services Administration’s Office of Federal High-Performance Green Buildings, aimed to understand the potential for institutional and behavioral change to enhance the performance of buildings, through a demonstration project with the Department of Defense in five green buildings on the Fort Carson, Colorado, Army base. To approach this study, the research team identified specific occupant behaviors that had the potential to save energy in each building, defined strategies that might effectively support behavior change, and implemented a coordinated set of actions during a three-month intervention.
Date: September 30, 2013
Creator: Judd, Kathleen S.; Sanquist, Thomas F.; Zalesny, Mary D. & Fernandez, Nicholas
System: The UNT Digital Library
Montana Integrated Carbon to Liquids (ICTL) Demonstration Program (open access)

Montana Integrated Carbon to Liquids (ICTL) Demonstration Program

Integrated carbon‐to‐liquids technology (ICTL) incorporates three basic processes for the conversion of a wide range of feedstocks to distillate liquid fuels: (1) Direct Microcatalytic Coal Liquefaction (MCL) is coupled with biomass liquefaction via (2) Catalytic Hydrodeoxygenation and Isomerization (CHI) of fatty acid methyl esters (FAME) or trigylceride fatty acids (TGFA) to produce liquid fuels, with process derived (3) CO{sub 2} Capture and Utilization (CCU) via algae production and use in BioFertilizer for added terrestrial sequestration of CO{sub 2}, or as a feedstock for MCL and/or CHI. This novel approach enables synthetic fuels production while simultaneously meeting EISA 2007 Section 526 targets, minimizing land use and water consumption, and providing cost competitive fuels at current day petroleum prices. ICTL was demonstrated with Montana Crow sub‐bituminous coal in MCL pilot scale operations at the Energy and Environmental Research Center at the University of North Dakota (EERC), with related pilot scale CHI studies conducted at the University of Pittsburgh Applied Research Center (PARC). Coal‐Biomass to Liquid (CBTL) Fuel samples were evaluated at the US Air Force Research Labs (AFRL) in Dayton and greenhouse tests of algae based BioFertilizer conducted at Montana State University (MSU). Econometric modeling studies were also conducted on the use …
Date: September 30, 2013
Creator: Fiato, Rocco; Sharma, Ramesh; Allen, Mark; Peyton, Brent; Macur, Richard & Cameron, Jemima
System: The UNT Digital Library
Federal Mandatory Minimum Sentencing Statutes (open access)

Federal Mandatory Minimum Sentencing Statutes

This report discusses the federal mandatory minimum sentencing statutes, that limits the discretion of a sentencing court to impose a sentence that does not include a term of imprisonment or the death penalty. The United States Sentencing Commission's Mandatory Minimum Penalties in the Federal Criminal Justice System (2011) recommends consideration of amendments to several of the statutes under which federal mandatory minimum sentences are most often imposed.
Date: September 9, 2013
Creator: Doyle, Charles
System: The UNT Digital Library
Cast Stone Formulation At Higher Sodium Concentrations (open access)

Cast Stone Formulation At Higher Sodium Concentrations

A low temperature waste form known as Cast Stone is being considered to provide supplemental Low Activity Waste (LAW) immobilization capacity for the Hanford site. Formulation of Cast Stone at high sodium concentrations is of interest since a significant reduction in the necessary volume of Cast Stone and subsequent disposal costs could be achieved if an acceptable waste form can be produced with a high sodium molarity salt solution combined with a high water to premix (or dry blend) ratio. The objectives of this study were to evaluate the factors involved with increasing the sodium concentration in Cast Stone, including production and performance properties and the retention and release of specific components of interest. Three factors were identified for the experimental matrix: the concentration of sodium in the simulated salt solution, the water to premix ratio, and the blast furnace slag portion of the premix. The salt solution simulants used in this study were formulated to represent the overall average waste composition. The cement, blast furnace slag, and fly ash were sourced from a supplier in the Hanford area in order to be representative. The test mixes were prepared in the laboratory and fresh properties were measured. Fresh density increased …
Date: September 17, 2013
Creator: Fox, K. M.; Roberts, K. A. & Edwards, T. B.
System: The UNT Digital Library