States

CRADA Final Report For CRADA NO. CR-12-006 [Operation and Testing of an SO{sub 2}-depolarized Electrolyzer (SDE) for the Purpose of Hydrogen and Sulfuric Acid Production] (open access)

CRADA Final Report For CRADA NO. CR-12-006 [Operation and Testing of an SO{sub 2}-depolarized Electrolyzer (SDE) for the Purpose of Hydrogen and Sulfuric Acid Production]

Over the past several years, Savannah River National Laboratory (SRNL) has led a team of collaborators under the Department of Energy’s (DOE) nuclear hydrogen production program to develop the Hybrid Sulfur (HyS) Process. HyS is a 2-step water-splitting process consisting of high temperature decomposition of sulfuric acid to generate SO{sub 2}, followed by the electrolysis of aqueous SO{sub 2} to generate hydrogen and sulfuric acid. The latter is fed back into the high temperature reactor. SRNL designed and built an SO{sub 2}-depolarized electrolyzer (SDE) and a test facility. Over 40 SDE’s were tested using different catalysts, membranes and other components. SRNL demonstrated that an SDE could be operated continuously for approximately 200 hours under certain conditions without buildup of sulfur at the SDE’s cathode, thus solving a key technical problem with SDE technology. Air Products and Chemicals, Inc. (APCI) is a major supplier of hydrogen production systems, and they have proprietary technology that could benefit from the SDE developed by SRNS, or some improved version thereof. However, to demonstrate that SRNL’s SDE is a truly viable approach to the electrolyzer design, continuous operation for far greater periods of time than 200 hours must be demonstrated, and the electrolyzer must be …
Date: February 24, 2014
Creator: Summers, W. A.; Colon-Mercado, H. R.; Steimke, J. L. & Zahn, Steffen
Object Type: Report
System: The UNT Digital Library
Electron g-2 in Light-Front Quantization (open access)

Electron g-2 in Light-Front Quantization

None
Date: February 24, 2014
Creator: Zhao, Xingbo; Honkanen, Heli; Maris, Pieter; Vary, James P. & Brodsky, Stanley J.
Object Type: Article
System: The UNT Digital Library
Final Technical Report: The Water-to-Wire (W2W) Project (open access)

Final Technical Report: The Water-to-Wire (W2W) Project

The purpose of the Free Flow Power (FFP) Water-to-Wire Project (Project) was to evaluate and optimize the performance, environmental compatibility, and cost factors of FFP hydrokinetic turbines through design analyses and deployments in test flumes and riverine locations.
Date: December 24, 2013
Creator: Lissner, Daniel N. & Edward, Lovelace C.
Object Type: Report
System: The UNT Digital Library
SciDAC-Center for Plasma Edge Simulation Report (open access)

SciDAC-Center for Plasma Edge Simulation Report

The Common Component Architecture (CCA) effort is the embodiment of a long-range program of research and development into the formulation, roles, and use of component technologies in high-performance scientific computing. CCA components can interoperate with other components in a variety of frameworks, including SCIRun2 from the University of Utah. The SCIRun2 framework is also developing the ability to connect components from a variety of different models through a mechanism called meta-components. The meta component model operates by providing a plugin architecture for component models. Abstract components are manipulated and managed by the SCIRun2 framework, while concrete component models perform the actual work and communicate with each other directly. We will leverage the SCIRun2 framework and the Kepler system to orchestrate components in the Fusion Simulation Project (FSP) and to provide a CCA-based interface with Kepler. The groundwork for this functionality is being performed with the Scientific Data Management center. The SDM center is developing CCA-compliant interfaces for expressing and executing workflows and create workflow components based on SCIRun and Ptolemy (Kepler) execution engines, including development of uniform interfaces for selecting, starting, and monitoring scientific workflows. Accomplishments include Introduction to CCA and Simulation Software Systems, Introduction into SCIRun2 and Bridging within …
Date: December 24, 2013
Creator: Parker, Steven
Object Type: Report
System: The UNT Digital Library
Doping Cu{sub 2}O in Electrolyte Solution: Dopant Incorporation, Atomic Structures and Electrical Properties (open access)

Doping Cu{sub 2}O in Electrolyte Solution: Dopant Incorporation, Atomic Structures and Electrical Properties

We have pursued a number of research activities between April 2010 and April 2011:  A detailed study on n-type doping in Cu2O by Br;  An analysis of natural resource limitations to terawatt-scale solar cells;  Attempt to achieve a 1.4-eV direct band gap in Ni sulfides (NiSx);  First-principles studies of doping in Cu2O and electronic structures of NiSx.
Date: November 24, 2013
Creator: Tao, Meng & Zhang, Qiming
Object Type: Report
System: The UNT Digital Library
Calcium-Mediated Regulation of Proton-Coupled Sodium Transport - Final Report (open access)

Calcium-Mediated Regulation of Proton-Coupled Sodium Transport - Final Report

The long-term goal of our experiments was to understand mechanisms that regulate energy coupling by ion currents in plants. Activities of living organisms require chemical, mechanical, osmotic or electrical work, the energy for which is supplied by metabolism. Adenosine triphosphate (ATP) has long been recognized as the universal energy currency, with metabolism supporting the synthesis of ATP and the hydrolysis of ATP being used for the subsequent work. However, ATP is not the only energy currency in living organisms. A second and very different energy currency links metabolism to work by the movement of ions passing from one side of a membrane to the other. These ion currents play a major role in energy capture and they support a range of physiological processes from the active transport of nutrients to the spatial control of growth and development. In Arabidopsis thaliana (Arabidopsis), the activity of a plasma membrane Na+/H+ exchanger, SALT OVERLY SENSITIVE1 (SOS1), is essential for regulation of sodium ion homeostasis during plant growth in saline conditions. Mutations in SOS1 result in severely reduced seedling growth in the presence of salt compared to the growth of wild type. SOS1 is a secondary active transporter coupling movement of sodium ions out …
Date: October 24, 2013
Creator: Schumaker, Karen S
Object Type: Report
System: The UNT Digital Library
Depressed electron collector for the Gatling Gun Test Stand (open access)

Depressed electron collector for the Gatling Gun Test Stand

N/A
Date: October 24, 2013
Creator: A., Pikin; Ben-Zvi, Ilan; Chang, X. Y.; Gassner, D.; Litvinenko, V.; Rahman, O. et al.
Object Type: Report
System: The UNT Digital Library
Integrated Stochastic Weather and Production Simulation Modeling (open access)

Integrated Stochastic Weather and Production Simulation Modeling

None
Date: October 24, 2013
Creator: Edmunds, T; Bulaevskaya, V; Lamont, A; Simpson, M; Top, P; Katzenstein, W et al.
Object Type: Article
System: The UNT Digital Library
Neutrino Coherent Scattering Rates at Direct Dark Matter Detectors (open access)

Neutrino Coherent Scattering Rates at Direct Dark Matter Detectors

None
Date: October 24, 2013
Creator: Strigari, Louis E.
Object Type: Article
System: The UNT Digital Library
A New Approach to Testing Dark Energy Models by Observations (open access)

A New Approach to Testing Dark Energy Models by Observations

None
Date: October 24, 2013
Creator: Gu, Je-An; Chen, Chien-Wen & Chen, Pisin
Object Type: Article
System: The UNT Digital Library
PreCam, a Precursor Observational Campaign for Calibration of the Dark Energy Survey (open access)

PreCam, a Precursor Observational Campaign for Calibration of the Dark Energy Survey

None
Date: October 24, 2013
Creator: Kuehn, K.; Kuhlmann, S.; Allam, S.; Annis, J. T.; Bailey, T.; Balbinot, E. et al.
Object Type: Article
System: The UNT Digital Library
Rapidly Soldidified U-6wt%Nb Powders for Dispersion-Type Nuclear Fuels (open access)

Rapidly Soldidified U-6wt%Nb Powders for Dispersion-Type Nuclear Fuels

None
Date: October 24, 2013
Creator: McKeown, J T; Hsiung, L L; Ryu, H J; Park, J M; Turchi, P A & King, W E
Object Type: Article
System: The UNT Digital Library
Receive-Only Surface Coil with Improved Detuning for Pre-Clinical MRI Studies (open access)

Receive-Only Surface Coil with Improved Detuning for Pre-Clinical MRI Studies

N/A
Date: October 24, 2013
Creator: S., Rescia & S., Smith
Object Type: Article
System: The UNT Digital Library
The Advanced Radiographic Capability, A Major Upgrade Of The Computer Controls For The National Ignition Facility* (open access)

The Advanced Radiographic Capability, A Major Upgrade Of The Computer Controls For The National Ignition Facility*

None
Date: September 24, 2013
Creator: Brunton, G.; Marshall, C.; Lagin, L.; Tietbohl, G.; Fishler, B.; Fisher, J. et al.
Object Type: Article
System: The UNT Digital Library
Analytical Results For MOX Colemanite Concrete Samples Received On September 4, 2013 (open access)

Analytical Results For MOX Colemanite Concrete Samples Received On September 4, 2013

The Mixed Oxide Fuel Fabrication Facility (MFFF) will use colemanite bearing concrete neutron absorber panels credited with attenuating neutron flux in the criticality design analyses and shielding operators from radiation. The Savannah River National Laboratory (SRNL) is tasked with measuring the total density, partial hydrogen density, and partial boron density of the colemanite concrete. SRNL received three samples of colemanite concrete for analysis on September 4, 2013. The average total density of each of the samples measured by the ASTM method C 642, the average partial hydrogen density was measured using method ASTM E 1131, and the average partial boron density of each sample was measured according to ASTM C 1301. The lower limits and measured values for the total density, hydrogen partial density, and boron partial density are presented. For all the samples tested, the total density and the boron partial density met or exceeded the specified limit. None of the samples met the lower limit for hydrogen partial density.
Date: September 24, 2013
Creator: Reigel, Marissa M.
Object Type: Report
System: The UNT Digital Library
Evaluation and Testing of the ADVANTG Code on SNM Detection (open access)

Evaluation and Testing of the ADVANTG Code on SNM Detection

Pacific Northwest National Laboratory (PNNL) has been tasked with evaluating the effectiveness of ORNL’s new hybrid transport code, ADVANTG, on scenarios of interest to our NA-22 sponsor, specifically of detection of diversion of special nuclear material (SNM). PNNL staff have determined that acquisition and installation of ADVANTG was relatively straightforward for a code in its phase of development, but probably not yet sufficient for mass distribution to the general user. PNNL staff also determined that with little effort, ADVANTG generated weight windows that typically worked for the problems and generated results consistent with MCNP. With slightly greater effort of choosing a finer mesh around detectors or sample reaction tally regions, the figure of merit (FOM) could be further improved in most cases. This does take some limited knowledge of deterministic transport methods. The FOM could also be increased by limiting the energy range for a tally to the energy region of greatest interest. It was then found that an MCNP run with the full energy range for the tally showed improved statistics in the region used for the ADVANTG run. The specific case of interest chosen by the sponsor is the CIPN project from Las Alamos National Laboratory (LANL), which …
Date: September 24, 2013
Creator: Shaver, Mark W.; Casella, Andrew M.; Wittman, Richard S. & Hayes, John W.
Object Type: Report
System: The UNT Digital Library
A Fast Topological Trigger for Real Time Analysis of Nanosecond Phenomena; Opening the Gamma Ray Window to Our Universe (open access)

A Fast Topological Trigger for Real Time Analysis of Nanosecond Phenomena; Opening the Gamma Ray Window to Our Universe

This work was to enable the development of a proof-of-principle nanosecond trigger system that is designed to perform a real time analysis of fast Cherenkov light flashes from air showers. The basic building blocks of the trigger system have been designed and constructed, and a real world system is now operating in the VERITAS experiment.
Date: September 24, 2013
Creator: Krennrich, Frank
Object Type: Report
System: The UNT Digital Library
Flexible Data Driven Experimental Data Analysis At The National Ignition Facility* (open access)

Flexible Data Driven Experimental Data Analysis At The National Ignition Facility*

None
Date: September 24, 2013
Creator: Casey, A.; Bettenhausen, R.; Bond, E.; Fallejo, R.; Hutton, M.; Liebman, J. et al.
Object Type: Article
System: The UNT Digital Library
Image Analysis For The Automated Alignment of the Advanced Radiography Capability (ARC) Diagnostic Path (open access)

Image Analysis For The Automated Alignment of the Advanced Radiography Capability (ARC) Diagnostic Path

None
Date: September 24, 2013
Creator: Roberts, R. S.; Awwal, A.; Leach, R.; Rushford, M.; Bliss, E. & Wilhelmsen, K.
Object Type: Article
System: The UNT Digital Library
In-situ transmission electron microscopy of crystal growth-mode transitions during rapid solidification of a hypoeutectic Al-Cu ally (open access)

In-situ transmission electron microscopy of crystal growth-mode transitions during rapid solidification of a hypoeutectic Al-Cu ally

None
Date: September 24, 2013
Creator: McKeown, J. T.; Kulovits, A. K.; Liu, C.; Zweiacker, K.; Reed, B. W.; LaGrange, T. et al.
Object Type: Article
System: The UNT Digital Library
Intensity Frontier Instrumentation (open access)

Intensity Frontier Instrumentation

The fundamental origin of flavor in the Standard Model (SM) remains a mystery. Despite the roughly eighty years since Rabi asked “Who ordered that?” upon learning of the discovery of the muon, we have not understood the reason that there are three generations or, more recently, why the quark and neutrino mixing matrices and masses are so different. The solution to the flavor problem would give profound insights into physics beyond the Standard Model (BSM) and tell us about the couplings and the mass scale at which the next level of insight can be found. The SM fails to explain all observed phenomena: new interactions and yet unseen particles must exist. They may manifest themselves by causing SM reactions to differ from often very precise predictions. The Intensity Frontier (1) explores these fundamental questions by searching for new physics in extremely rare processes or those forbidden in the SM. This often requires massive and/or extremely finely tuned detectors.
Date: September 24, 2013
Creator: S., Kettell; Rameika, R. & Tshirhart, B.
Object Type: Report
System: The UNT Digital Library
Managing A Product Called NIF - PLM Current State And Processes (open access)

Managing A Product Called NIF - PLM Current State And Processes

None
Date: September 24, 2013
Creator: Dobson, D.; Churby, A. & Krieger, E.
Object Type: Article
System: The UNT Digital Library
Monitoring Of The National Ignition Facility Integrated Computer Control System* (open access)

Monitoring Of The National Ignition Facility Integrated Computer Control System*

None
Date: September 24, 2013
Creator: Fisher, J; Arrowsmith, M & Stout, E
Object Type: Article
System: The UNT Digital Library