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Science & Technology Review
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Bench Scale Testing of Micronized Magnetite Beneficiation Progress Report
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Fundamental Studies of Recombinant Hydrogenases
This research addressed the long term goals of understanding the assembly and organization of hydrogenase enzymes, of reducing them in size and complexity, of determining structure/function relationships, including energy conservation via charge separation across membranes, and in screening for novel H2 catalysts. A key overall goal of the proposed research was to define and characterize minimal hydrogenases that are produced in high yields and are oxygen-resistant. Remarkably, in spite of decades of research carried out on hydrogenases, it is not possible to readily manipulate or design the enzyme using molecular biology approaches since a recombinant form produced in a suitable host is not available. Such resources are essential if we are to understand what constitutes a “minimal” hydrogenase and design such catalysts with certain properties, such as resistance to oxygen, extreme stability and specificity for a given electron donor. The model system for our studies is Pyrococcus furiosus, a hyperthermophile that grows optimally at 100°C, which contains three different nickel-iron [NiFe-] containing hydrogenases. Hydrogenases I and II are cytoplasmic while the other, MBH, is an integral membrane protein that functions to both evolve H2 and pump protons. Three important breakthroughs were made during the funding period with P. furiosus soluble …
Date:
January 25, 2014
Creator:
Adams, Michael W
System:
The UNT Digital Library
Post-irradiation Examination Plan for ORNL and University of California Santa Barbara Assessment of UCSB ATR-2 Irradiation Experiment
New and existing databases will be combined to support development of physically based models of transition temperature shifts (TTS) for high fluence-low flux (φ < 10{sup 11}n/cm{sup 2}-s) conditions, beyond the existing surveillance database, to neutron fluences of at least 1×10{sup 20} n/cm{sup 2} (>1 MeV). All references to neutron flux and fluence in this report are for fast neutrons (>1 MeV). The reactor pressure vessel (RPV) task of the Light Water Reactor Sustainability (LWRS) Program is working with various organizations to obtain archival surveillance materials from commercial nuclear power plants to allow for comparisons of the irradiation-induced microstructural features from reactor surveillance materials with those from similar materials irradiated under high flux conditions in test reactors
Date:
January 25, 2014
Creator:
Nanstad, R. K.; Yamamoto, T. & Sokolov, M. A.
System:
The UNT Digital Library
Enhancing the precision and accuracy within and among AmeriFlux site measurements
This is the final report for AmeriFlux QA/QC at Oregon State University. The major objective of this project is to contribute to the AmeriFlux network by continuing to build consistency in AmeriFlux measurements by addressing objectives stated in the AmeriFlux strategic plan and self evaluation, the North American Carbon Program, and the US Carbon Cycle Science Program. The project directly contributes to NACP and CCSP goals to establish an integrated, near-real time network of observations to inform climate change science.
Date:
November 25, 2013
Creator:
Law, Bev
System:
The UNT Digital Library
Exascale Co-Design Center for Materials in Extreme Environments (ExMatEx) Annual Report - Year 2
None
Date:
November 25, 2013
Creator:
Germann, T; Richards, D; McPherson, A & Belak, J
System:
The UNT Digital Library
Pathways, Networks and Systems Medicine Conferences
The 6th Pathways, Networks and Systems Medicine Conference was held at the Minoa Palace Conference Center, Chania, Crete, Greece (16-21 June 2008). The Organizing Committee was composed of Joe Nadeau (CWRU, Cleveland), Rudi Balling (German Research Centre, Brauschweig), David Galas (Institute for Systems Biology, Seattle), Lee Hood (Institute for Systems Biology, Seattle), Diane Isonaka (Seattle), Fotis Kafatos (Imperial College, London), John Lambris (Univ. Pennsylvania, Philadelphia),Harris Lewin (Univ. of Indiana, Urbana-Champaign), Edison Liu (Genome Institute of Singapore, Singapore), and Shankar Subramaniam (Univ. California, San Diego). A total of 101 individuals from 21 countries participated in the conference: USA (48), Canada (5), France (5), Austria (4), Germany (3), Italy (3), UK (3), Greece (2), New Zealand (2), Singapore (2), Argentina (1), Australia (1), Cuba (1), Denmark (1), Japan (1), Mexico (1), Netherlands (1), Spain (1), Sweden (1), Switzerland (1). With respect to speakers, 29 were established faculty members and 13 were graduate students or postdoctoral fellows. With respect to gender representation, among speakers, 13 were female and 28 were male, and among all participants 43 were female and 58 were male. Program these included the following topics: Cancer Pathways and Networks (Day 1), Metabolic Disease Networks (Day 2), Day 3 ? Organs, …
Date:
November 25, 2013
Creator:
Nadeau, Joseph H.
System:
The UNT Digital Library
SUSY Simplified Models at 14, 33, and 100 TeV Proton Colliders
None
Date:
November 25, 2013
Creator:
Cohen, Timothy
System:
The UNT Digital Library
ALTERNATIVE METHODS FOR TRITIUM RECOVERY FROM THE LIFELITHIUM BLANKET: FY13 FINAL REPORT
None
Date:
October 25, 2013
Creator:
Bandhauer, T & Adler, J
System:
The UNT Digital Library
Final Report: "Sensitivity Study of LIFE Chamber Dynamics"
None
Date:
October 25, 2013
Creator:
Pantano-Rubino, C; Uddin, H & Kramer, R
System:
The UNT Digital Library
LIFE Reactor Study Fiscal Year 2013 Contract Report
None
Date:
October 25, 2013
Creator:
Sacks, R & Moses, G
System:
The UNT Digital Library
LLNL HEPA Filter Support of Nuclear Facility Safety R&D (FY12)
None
Date:
October 25, 2013
Creator:
Mitchell, M A; Brown, E & Haslam, J
System:
The UNT Digital Library
Modeling Adjustable Speed Pumped Storage Hydro Units Employing Doubly-Fed Induction Machines
None
Date:
October 25, 2013
Creator:
Feltes, J.; Koritarov, V.; Guzowski, L.; Kazachkov, Y.; Gong, B.; Trouille, B. et al.
System:
The UNT Digital Library
Modeling Ternary Pumped Storage Units
None
Date:
October 25, 2013
Creator:
Feltes, J.; Kazachkov, Y.; Gong, B.; Trouille, B.; Donalek, P.; Koritarov, V. et al.
System:
The UNT Digital Library
"Multiscale Capabilities for Exploring Transport Phenomena in Batteries": Ab Initio Calculations on Defective LiFePO4
None
Date:
October 25, 2013
Creator:
Kanai, Y; Tang, M & Wood, B C
System:
The UNT Digital Library
Optical System Case Studies for Speckle Imaging
None
Date:
October 25, 2013
Creator:
Carrano, C J
System:
The UNT Digital Library
Review of Existing Hydroelectric Turbine-Governor Simulation Models
None
Date:
October 25, 2013
Creator:
Feltes, J.; Koritarov, V.; Guzowski, L.; Kazachkov, Y.; Lam, B.; Grande-Moran, C. et al.
System:
The UNT Digital Library
Testing Dynamic Simulation Models for Different Types of Advanced Pumped Storage Hydro Units
None
Date:
October 25, 2013
Creator:
Feltes, J.; Koritarov, V.; Kazachkov, Y.; Gong, B.; Donalek, P.; Gevorgian, V. (Decision and Information Sciences) et al.
System:
The UNT Digital Library
2013 LIDAR Campaign at Buena Vista Wind Farm: An Examination of Hill Speedup Flows
None
Date:
September 25, 2013
Creator:
Wharton, S; Qualley, G; Newman, J & Miller, W
System:
The UNT Digital Library
Assessment of Proton Deflectometry for Exploding Wire Experiments
This project provides the first demonstration of the application of proton deflectometry for the diagnosis of electromagnetic field topology and current-carrying regions in Z-pinch plasma experiments. Over the course of this project several milestones were achieved. High-energy proton beam generation was demonstrated on the short-pulse high-intensity Leopard laser, (10 Joules in ~350 femtoseconds, and the proton beam generation was shown to be reproducible. Next, protons were used to probe the electromagnetic field structure of short circuit loads in order to benchmark the two numerical codes, the resistive-magnetohydrodynamics (MHD) code, Gorgon, and the hybrid particle-in-cell code, LSP for the interpretation of results. Lastly, the proton deflectometry technique was used to map the magnetic field structure of pulsed-power-driven plasma loads including wires and supersonic jets formed with metallic foils. Good agreement between the modeling and experiments has been obtained. The demonstrated technique holds great promise to significantly improve the understanding of current flow and electromagnetic field topology in pulsed power driven high energy density plasmas. Proton probing with a high intensity laser was for the first time implemented in the presence of the harsh debris and x-ray producing z-pinch environment driven by a mega-ampere-scale pulsed-power machine. The intellectual merit of the program …
Date:
September 25, 2013
Creator:
Beg, Farhat Nadeem
System:
The UNT Digital Library
Characterization Of Sample HTF-13-13-128
Savannah River Remediation (SRR) has requested that Savannah River National Laboratory (SRNL) characterize a sample of Tank 13 in preparation for Sludge Batch 9 (SB9). A 200 mL sample of Tank 13 was received by SRNL on July 22, 2013 (Tank Farm sample ID HTF-13-13-128). Characterization of the sample to meet the requirements of the request is complete. Results include: visual observations; slurry and supernatant density; weight percent total and insoluble solids; supernatant characterization; total alpha, total beta, and several radionuclide analyses; and elemental analyses of the dried solids. The sample was very fluid. After settling overnight, there was a small layer of solids on the bottom of the sample container (a 250 mL HDPE bottle) with the remainder being clear supernatant. To better show the sludge solids relative to the overall sample, 25 mL of slurry was placed in a graduated cylinder and allowed to settle over a weekend (approximately 90 hours). The sludge layer was at the approximately 4 mL. The small visually observed quantity of insoluble solids was confirmed with a low weight percent insoluble solids of 0.94%.
Date:
September 25, 2013
Creator:
Pareizs, J. M.
System:
The UNT Digital Library
Development of Parallel Computing Framework to Enhance Radiation Transport Code Capabilities for Rare Isotope Beam Facility Design
A parallel computing framework has been developed to use with general-purpose radiation transport codes. The framework was implemented as a C++ module that uses MPI for message passing. It is intended to be used with older radiation transport codes implemented in Fortran77, Fortran 90 or C. The module is significantly independent of radiation transport codes it can be used with, and is connected to the codes by means of a number of interface functions. The framework was developed and tested in conjunction with the MARS15 code. It is possible to use it with other codes such as PHITS, FLUKA and MCNP after certain adjustments. Besides the parallel computing functionality, the framework offers a checkpoint facility that allows restarting calculations with a saved checkpoint file. The checkpoint facility can be used in single process calculations as well as in the parallel regime. The framework corrects some of the known problems with the scheduling and load balancing found in the original implementations of the parallel computing functionality in MARS15 and PHITS. The framework can be used efficiently on homogeneous systems and networks of workstations, where the interference from the other users is possible.
Date:
September 25, 2013
Creator:
Kostin, Mikhail; Mokhov, Nikolai & Niita, Koji
System:
The UNT Digital Library
DWPF Simulant CPC Studies For SB8
Prior to processing a Sludge Batch (SB) in the Defense Waste Processing Facility (DWPF), flowsheet studies using simulants are performed. Typically, the flowsheet studies are conducted based on projected composition(s). The results from the flowsheet testing are used to 1) guide decisions during sludge batch preparation, 2) serve as a preliminary evaluation of potential processing issues, and 3) provide a basis to support the Shielded Cells qualification runs performed at the Savannah River National Laboratory (SRNL). SB8 was initially projected to be a combination of the Tank 40 heel (Sludge Batch 7b), Tank 13, Tank 12, and the Tank 51 heel. In order to accelerate preparation of SB8, the decision was made to delay the oxalate-rich material from Tank 12 to a future sludge batch. SB8 simulant studies without Tank 12 were reported in a separate report.1 The data presented in this report will be useful when processing future sludge batches containing Tank 12. The wash endpoint target for SB8 was set at a significantly higher sodium concentration to allow acceptable glass compositions at the targeted waste loading. Four non-coupled tests were conducted using simulant representing Tank 40 at 110-146% of the Koopman Minimum Acid requirement. Hydrogen was generated during …
Date:
September 25, 2013
Creator:
Newell, J. D.
System:
The UNT Digital Library
Planning Document for an NBSR Conversion Safety Analysis Report
The NIST Center for Neutron Research (NCNR) is a reactor-laboratory complex providing the National Institute of Standards and Technology (NIST) and the nation with a world-class facility for the performance of neutron-based research. The heart of this facility is the National Bureau of Standards Reactor (NBSR). The NBSR is a heavy water moderated and cooled reactor operating at 20 MW. It is fueled with high-enriched uranium (HEU) fuel elements. A Global Threat Reduction Initiative (GTRI) program is underway to convert the reactor to low-enriched uranium (LEU) fuel. This program includes the qualification of the proposed fuel, uranium and molybdenum alloy foil clad in an aluminum alloy, and the development of the fabrication techniques. This report is a planning document for the conversion Safety Analysis Report (SAR) that would be submitted to, and approved by, the Nuclear Regulatory Commission (NRC) before the reactor could be converted.This report follows the recommended format and content from the NRC codified in NUREG-1537, “Guidelines for Preparing and Reviewing Applications for the Licensing of Non-power Reactors,” Chapter 18, “Highly Enriched to Low-Enriched Uranium Conversions.” The emphasis herein is on the SAR chapters that require significant changes as a result of conversion, primarily Chapter 4, Reactor Description, …
Date:
September 25, 2013
Creator:
Diamond, D. J.; Baek, J.; Hanson, A. L.; Cheng, L. Y.; Brown, N. & Cuadra, A.
System:
The UNT Digital Library
Radiation Leukemogenesis at Low Dose Rates
The major goals of this program were to study the efficacy of low dose rate radiation exposures for the induction of acute myeloid leukemia (AML) and to characterize the leukemias that are caused by radiation exposures at low dose rate. An irradiator facility was designed and constructed that allows large numbers of mice to be irradiated at low dose rates for protracted periods (up to their life span). To the best of our knowledge this facility is unique in the US and it was subsequently used to study radioprotectors being developed for radiological defense (PLoS One. 7(3), e33044, 2012) and is currently being used to study the role of genetic background in susceptibility to radiation-induced lung cancer. One result of the irradiation was expected; low dose rate exposures are ineffective in inducing AML. However, another result was completely unexpected; the irradiated mice had a very high incidence of hepatocellular carcinoma (HCC), approximately 50%. It was unexpected because acute exposures are ineffective in increasing HCC incidence above background. This is a potential important finding for setting exposure limits because it supports the concept of an 'inverse dose rate effect' for some tumor types. That is, for the development of some tumor …
Date:
September 25, 2013
Creator:
Weil, Michael & Ullrich, Robert
System:
The UNT Digital Library
The Radiative Properties of Small Clouds: Multi-Scale Observations and Modeling
Warm, liquid clouds and their representation in climate models continue to represent one of the most significant unknowns in climate sensitivity and climate change. Our project combines ARM observations, LES modeling, and satellite imagery to characterize shallow clouds and the role of aerosol in modifying their radiative effects.
Date:
September 25, 2013
Creator:
Feingold, Graham & McComiskey, Allison
System:
The UNT Digital Library