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Can Ionic Liquids Be Used As Templating Agents For Controlled Design of Uranium-Containing Nanomaterials?

Description: Nanostructured uranium oxides have been prepared in ionic liquids as templating agents. Using the ionic liquids as reaction media for inorganic nanomaterials takes advantage of the pre-organized structure of the ionic liquids which in turn controls the morphology of the inorganic nanomaterials. Variation of ionic liquid cation structure was investigated to determine the impact on the uranium oxide morphologies. For two ionic liquid cations, increasing the alkyl chain length increases the aspect… more
Date: April 9, 2013
Creator: Visser, A.; Bridges, N. & Tosten, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Using Plasmon Peaks in Electron Energy-Loss Spectroscopy to Determine the Physical and Mechanical Properties of Nanoscale Materials

Description: In this program, we developed new theoretical and experimental insights into understanding the relationships among fundamental universality and scaling phenomena, the solid-state physical and mechanical properties of materials, and the volume plasmon energy as measured by electron energy-loss spectroscopy (EELS). Particular achievements in these areas are summarized as follows: (i) Using a previously proposed physical model based on the universal binding-energy relation (UBER), we established c… more
Date: May 9, 2013
Creator: Howe, James M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reevaluation Of Vitrified High-Level Waste Form Criteria For Potential Cost Savings At The Defense Waste Processing Facility

Description: At the Savannah River Site (SRS) the Defense Waste Processing Facility (DWPF) has been immobilizing SRS's radioactive high level waste (HLW) sludge into a durable borosilicate glass since 1996. Currently the DWPF has poured over 3,500 canisters, all of which are compliant with the U. S. Department of Energy's (DOE) Waste Acceptance Product Specifications for Vitrified High-Level Waste Forms (WAPS) and therefore ready to be shipped to a federal geologic repository for permanent disposa… more
Date: January 9, 2013
Creator: Ray, J. W.; Marra, S. L. & Herman, C. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

REDUCTIONS WITHOUT REGRET: HISTORICAL PERSPECTIVES

Description: This is the first of three papers (in addition to an introductory summary) aimed at providing a framework for evaluating future reductions or modifications of the U.S. nuclear force, first by considering previous instances in which nuclear-force capabilities were eliminated; second by looking forward into at least the foreseeable future at the features of global and regional deterrence (recognizing that new weapon systems currently projected will have expected lifetimes stretching beyond our ab… more
Date: September 9, 2013
Creator: Swegle, J. & Tincher, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Axisymmetric Simulations of the ITER Vertical Stability Coil

Description: The ITER in-vessel coil system includes Vertical Stability (VS) coils and Edge Localized Mode (ELM) coils. There are two large VS ring coils, one upper and one lower. Each has four turns which are independently connected. The VS coils are needed for successful operation of ITER for most all of its operating modes. The VS coils must be highly reliable and fault tolerant. The operating environment includes normal and disruption Lorentz forces. To parametrically address all these design conditions… more
Date: July 9, 2013
Creator: Titus, Peter H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Letter Report for Characterization of Biochar

Description: On 27 November 2012, a bulk biochar sample was received for characterization of selected physical and chemical properties. The main purpose of the characterization was to help determine the degree to which biochar would be suitable as a soil amendment to aid in growth of plants. Towards this end, analyses to determine specific surface, pH, cation-exchange capacity, water retention, and wettability (i.e. surface tension) were conducted. A second objective was to determine how uniform these prope… more
Date: April 9, 2013
Creator: Amonette, James E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

APPLICATIONS OF CURRENT TECHNOLOGY FOR CONTINUOUS MONITORING OF SPENT FUEL

Description: Advancements in technology have opened many opportunities to improve upon the current infrastructure surrounding the nuclear fuel cycle. Embedded devices, very small sensors, and wireless technology can be applied to Security, Safety, and Nonproliferation of Spent Nuclear Fuel. Security, separate of current video monitoring systems, can be improved by integrating current wireless technology with a variety of sensors including motion detection, altimeter, accelerometer, and a tagging system. By … more
Date: June 9, 2013
Creator: Drayer, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Synthesis and Understanding of Novel Catalysts

Description: The research took advantage of our capabilities to perform in-situ and operando Raman spectroscopy on complex systems along with our developing expertise in the synthesis of uniform, supported metal oxide materials to investigate relationships between the catalytically active oxide composition, atomic structure, and support and the corresponding chemical and catalytic properties. The project was organized into two efforts: 1) Synthesis of novel catalyst materials by atomic layer deposition (ALD… more
Date: July 9, 2013
Creator: Stair, Peter C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Boron-10 ABUNCL Active Testing

Description: The Department of Energy Office of Nuclear Safeguards and Security (NA-241) is supporting the project Coincidence Counting With Boron-Based Alternative Neutron Detection Technology at Pacific Northwest National Laboratory (PNNL) for the development of a 3He proportional counter alternative neutron coincidence counter. The goal of this project is to design, build and demonstrate a system based upon 10B-lined proportional tubes in a configuration typical for 3He-based coincidence counter applicat… more
Date: July 9, 2013
Creator: Kouzes, Richard T.; Ely, James H.; Lintereur, Azaree T. & Siciliano, Edward R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of Measurement And Modeling Of Current Profile Changes Due To Neutral Bean Ion Redistribution During TAE Avalanches in NSTX

Description: Brief "avalanches" of toroidal Alfven eigenmodes (TAEs) are observed in NSTX plasmas with several different n numbers simultaneously present. These affect the neutral beam ion distribution as evidenced by a concurrent drop in the neutron rate and, sometimes, beam ion loss. Guiding center orbit modeling has shown that the modes can transiently render portions of the beam ion phase space stochastic. The resulting redistribution of beam ions can also create a broader beam-driven current … more
Date: July 9, 2013
Creator: Darrow, Douglas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tank 48 - Chemical Destruction

Description: Small tank copper-catalyzed peroxide oxidation (CCPO) is a potentially viable technology to facilitate the destruction of tetraphenylborate (TPB) organic solids contained within the Tank 48H waste at the Savannah River Site (SRS). A maturation strategy was created that identified a number of near-term development activities required to determine the viability of the CCPO process, and subsequent disposition of the CCPO effluent. Critical activities included laboratory-scale validation of the pro… more
Date: January 9, 2013
Creator: Simner, Steven P.; Aponte, Celia I. & Brass, Earl A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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