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X-Ray Diffraction Project Final Report, Fiscal Year 2006

Description: An x-ray diffraction diagnostic system was developed for determining real-time shock-driven lattice parameter shifts in single crystals at the gas gun at TA-IV at Sandia National Laboratories (SNL). The signal-to-noise ratio and resolution of the system were measured using imaging plates as the detector and by varying the slit width. This report includes tests of the x-ray diffraction system using a phosphor coupled to a charge-coupled device (CCD) camera by a coherent fiber-optic bundle. The s… more
Date: October 1, 2006
Creator: Morgan, Dane V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling Solute Thermokinetics in LiCI-KCI Molten Salt for Nuclear Waste Separation

Description: Recovery of actinides is an integral part of a closed nuclear fuel cycle. Pyrometallurgical nuclear fuel recycling processes have been developed in the past for recovering actinides from spent metallic and nitride fuels. The process is essentially to dissolve the spent fuel in a molten salt and then extract just the actinides for reuse in a reactor. Extraction is typically done through electrorefining, which involves electrochemical reduction of the dissolved actinides and plating onto a cathod… more
Date: September 30, 2013
Creator: Morgan, Dane & Eapen, Jacob
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ab initio Based Modeling of Radiation Effects in Multi-Component Alloys: Final Scientific/Technical Report

Description: The project began March 13, 2006, allocated for three years, and received a one year extension from March 13, 2009 to March 12, 2010. It has now completed 48 of 48 total months. The project was focused on using ab initio methods to gain insights into radiation induced segregation (RIS) in Ni-Fe-Cr alloys. The project had the following key accomplishments • Development of a large database of ab initio energetics that can be used by many researchers in the future for increased understanding o… more
Date: June 10, 2010
Creator: Morgan, Dane
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Real-time Studies of Shocked Polycrystalline Materials with Single-Pulse X-ray Diffraction

Description: Characteristic K-α x-rays used for single-pulse XRD are conventionally produced by a 37-stage high-voltage Marx pulse generator coupled to a vacuum needle-and-washer x-ray diode via coaxial transmission line. A large field-of-view x-ray image plate detection system typically enables observation of several Debye-Scherrer rings. Recently, we have developed a fiber-optic reducer, coupled to a CCD camera, to obtain low-noise, large field-of-view images. The direct beam spot is produced by bremsstra… more
Date: May 25, 2011
Creator: Morgan, Dane V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modeling Fission Product Sorption in Graphite Structures

Description: The goal of this project is to determine changes in adsorption and desorption of fission products to/from nuclear-grade graphite in response to a changing chemical environment. First, the project team will employ principle calculations and thermodynamic analysis to predict stability of fission products on graphite in the presence of structural defects commonly observed in very high- temperature reactor (VHTR) graphites. Desorption rates will be determined as a function of partial pressure of ox… more
Date: April 8, 2013
Creator: Szlufarska, Izabela; Morgan, Dane & Allen, Todd
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ab Initio Enhanced calphad Modeling of Actinide-Rich Nuclear Fuels

Description: The process of fuel recycling is central to the Advanced Fuel Cycle Initiative (AFCI), where plutonium and the minor actinides (MA) Am, Np, and Cm are extracted from spent fuel and fabricated into new fuel for a fast reactor. Metallic alloys of U-Pu-Zr-MA are leading candidates for fast reactor fuels and are the current basis for fast spectrum metal fuels in a fully recycled closed fuel cycle. Safe and optimal use of these fuels will require knowledge of their multicomponent phase stability and… more
Date: October 28, 2013
Creator: Morgan, Dane & Yang, Yong Austin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Flash X-Ray Diffraction System for Fast, Single-PulseTemperature and Phase Transition Measurements (Pre-print)

Description: A new, fast, single-pulse diagnostic for determining phase transitions and measuring the bulk temperature of polycrystalline metal objects has been developed. The diagnostic consists of a 37-stage Marx bank with a cable-coupled X-ray diode that produces a 35-ns pulse of mostly 0.71-{angstrom} monochromatic X rays and a P-43 fluor coupled to a cooled, charge-coupled device camera by a coherent fiber-optic bundle for detection of scattered X rays. The X-ray beam is collimated to a 1{sup o} diverg… more
Date: June 12, 2007
Creator: Madlener, Michael J. & Morgan, Dane V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Microstructure and Property Evolution in Advanced Cladding and Duct Materials Under Long-Term and Elevated Temperature Irradiation: Modeling and Experimental Investigation

Description: The in-service degradation of reactor core materials is related to underlying changes in the irradiated microstructure. During reactor operation, structural components and cladding experience displacement of atoms by collisions with neutrons at temperatures at which the radiation-induced defects are mobile, leading to microstructure evolution under irradiation that can degrade material properties. At the doses and temperatures relevant to fast reactor operation, the microstructure evolves by di… more
Date: December 1, 2013
Creator: Wirth, Brian; Morgan, Dane; Kaoumi, Djamel & Motta, Arthur
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Understanding the Irradiation Behavior of Zirconium Carbide

Description: Zirconium carbide (ZrC) is being considered for utilization in high-temperature gas-cooled reactor fuels in deep-burn TRISO fuel. Zirconium carbide possesses a cubic B1-type crystal structure with a high melting point, exceptional hardness, and good thermal and electrical conductivities. The use of ZrC as part of the TRISO fuel requires a thorough understanding of its irradiation response. However, the radiation effects on ZrC are still poorly understood. The majority of the existing research i… more
Date: October 11, 2013
Creator: Motta, Arthur; Sridharan, Kumar; Morgan, Dane & Szlufarska, Izabela
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis of radial radiography for the liner stability series at Pegasus: PGII-59, PGII-62, and PGII-63

Description: Recently, three liner stability experiments were performed at the Pegasus II pulsed power facility to determine the asymmetric variations in the material density of a cylindrical liner during an electro-magnetically driven implosion. The initial campaign consisted of three experiments, designated LS-1, LS-2, and LS-3. LS-1 and LS-2 were driven with a peak current of approximately 4.2 MA, whereas the peak current for LS-3 was approximately 6.4 MA. All three liners initially were 0.4 mm wall alum… more
Date: September 1, 1997
Creator: Morgan, Dane V.; Platts, David; Shlachter, Jack S.; Martinez, Donald L. & Carpenter, Bernard
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Accelerating Thick Aluminum Liners Using Pulsed Power

Description: The authors have investigated the acceleration of very thick cylindrical aluminum liners using the Pegasus II capacitory bank. These accelerated solid liners will be used to impact other objects at velocities below 1.5 km/sec, allowing one to generate and sustain shocks of a few 100 kilobar for a few microseconds. A cylindrical shell of 1100 series aluminum with an initial inner radius of 23.61 mm, an initial thickness of 3.0 mm, and a height of 20 mm, was accelerated using a current pulse of 7… more
Date: June 28, 1999
Creator: Kyrala, George A.; Hammerburg, James E.; Bowers, David; Stokes, John; Morgan, Dane V.; Anderson, Wally E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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