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Electrofuels Program
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Field Demonstration of a Membrane Process to Separate Nitrogen From Natural Gas Progress Report
6
Winter Fuels Report
4
ARM Facilities Newsletter
3
BEEST Program
3
Fiscal Year 2000
3
Fiscal Year 2005
3
Fiscal Year 2007
3
Petroleum Marketing Monthly
3
Establishment of an Industry-Driven Consortium Focused on Improving the Production Performance of Domestic Stripper Wells Quarterly Report
2
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Ability of the Confined Explosive Component Water Gap Test STANAG 4363 to Assess the Shock Sensitivity of MM-Scale Detonators
The Explosive Component Water Gap Test (ECWGT) has been validated to assess the shock sensitivity of lead and booster components having a diameter larger than 5 mm. Several countries have investigated by experiments and numerical simulations the effect of confinement on the go/no go threshold for Pentaerythritol Tetranitrate (PETN) pellets having a height and diameter of 3 mm, confined by a steel annulus of wall thickness 1-3.5 mm. Confinement of the PETN by a steel annulus of the same height of the pellet with 1-mm wall thickness makes the component more sensitive (larger gap). As the wall thickness is increased to 2-mm, the gap increases a lesser amount, but when the wall thickness is increased to 3.5-mm a decrease in sensitivity is observed (smaller gap). This decrease of the water gap has been reproduced experimentally. Recent numerical simulations using Ignition and Growth model [1] for the PETN Pellet have reproduced the experimental results for the steel confinement up to 2 mm thick [2]. The presence of a stronger re-shock following the first input shock from the water and focusing on the axis have been identified in the pellet due to the steel confinement. The double shock configuration is well-known to …
Date:
February 10, 2006
Creator:
Lefrancois, A. S.; Roeske, F.; Benterou, J.; Tarver, C. M.; Lee, R. S. & Hannah, B.
Object Type:
Report
System:
The UNT Digital Library
The Absence of Plasma in"Spark Plasma Sintering"
Spark plasma sintering (SPS) is a remarkable method for synthesizing and consolidating a large variety of both novel and traditional materials. The process typically uses moderate uni-axial pressures (<100 MPa) in conjunction with a pulsing on-off DC current during operation. There are a number of mechanisms proposed to account for the enhanced sintering abilities of the SPS process. Of these mechanisms, the one most commonly put forth and the one that draws the most controversy involves the presence of momentary plasma generated between particles. This study employees three separate experimental methods in an attempt to determine the presence or absence of plasma during SPS. The methods employed include: in-situ atomic emission spectroscopy, direct visual observation and ultra-fast in-situ voltage measurements. It was found using these experimental techniques that no plasma is present during the SPS process. This result was confirmed using several different powders across a wide spectrum of SPS conditions.
Date:
April 10, 2008
Creator:
Hulbert, Dustin M.; Anders, Andre; Dudina, Dina V.; Andersson, Joakim; Jiang, Dongtao; Unuvar, Cosan et al.
Object Type:
Article
System:
The UNT Digital Library
Absolute Calibration of Image Plate for electrons at energy between 100 keV and 4 MeV
The authors measured the absolute response of image plate (Fuji BAS SR2040) for electrons at energies between 100 keV to 4 MeV using an electron spectrometer. The electron source was produced from a short pulse laser irradiated on the solid density targets. This paper presents the calibration results of image plate Photon Stimulated Luminescence PSL per electrons at this energy range. The Monte Carlo radiation transport code MCNPX results are also presented for three representative incident angles onto the image plates and corresponding electron energies depositions at these angles. These provide a complete set of tools that allows extraction of the absolute calibration to other spectrometer setting at this electron energy range.
Date:
December 10, 2007
Creator:
Chen, H; Back, N L; Eder, D C; Ping, Y; Song, P M & Throop, A
Object Type:
Article
System:
The UNT Digital Library
Absolute equation of state measurements of shocked liquid deuterium up to 200 GPa (2 Mbar)
We present results of the first measurements of density, shock speed and particle speed in compressed liquid deuterium at pressures in excess in 1 Mbar. We have performed equation of state (EOS) measurements on the principal Hugoniot of liquid deuterium from 0.2 to 2 Mbar. We employ high-resolution radiography to simultaneously measure the compression of the sample. We are also attempting to measure the color temperature of the shocked D2. Key to this effort is the development and implementation of interferometric methods in order to carefully characterized the profile and steadiness of the shock and the level of preheat in the samples. These experiments allow us to differentiate between the accepted EOS model for D2 and a new model which included the effects of molecular dissociation on the EOS.
Date:
June 10, 1997
Creator:
Budil, K. S.; Da Silva, L. B. & Celliers, P.
Object Type:
Article
System:
The UNT Digital Library
Absolute Polarimetry at RHIC
Precise and absolute beam polarization measurements are critical for the RHIC spin physics program. Because all experimental spin-dependent results are normalized by beam polarization, the normalization uncertainty contributes directly to final physics uncertainties. We aimed to perform the beam polarization measurement to an accuracy Of {Delta}P{sub beam}/P{sub beam} < 5%. The absolute polarimeter consists of Polarized Atomic Hydrogen Gas Jet Target and left-right pairs of silicon strip detectors and was installed in the RHIC-ring in 2004. This system features proton-proton elastic scattering in the Coulomb nuclear interference (CNI) region. Precise measurements of the analyzing power A{sub N} of this process has allowed us to achieve {Delta}P{sub beam}/P{sub beam} = 4.2% in 2005 for the first long spin-physics run. In this report, we describe the entire set up and performance of the system. The procedure of beam polarization measurement and analysis results from 2004-2005 are described. Physics topics of AN in the CNI region (four-momentum transfer squared 0.001 < -t < 0.032 (GeV/c){sup 2}) are also discussed. We point out the current issues and expected optimum accuracy in 2006 and the future.
Date:
September 10, 2007
Creator:
Okada, H.; Bravar, A.; Bunce, G.; Gill, R.; Huang, H.; Makdisi, Y. et al.
Object Type:
Article
System:
The UNT Digital Library
ACCELERATED-AGING OF SHIPPING PACKAGE O-RINGS FOR PU STORAGE
The Savannah River Site (SRS) is storing surplus plutonium (Pu) materials in the K-Area Materials Storage (KAMS) facility. The Pu materials are packaged per the DOE 3013 Standard. The nested, welded 300 series stainless steel 3013 containers are transported to KAMS in Type B shipping packages and subsequently stored in the same packages. These type B shipping packages consist of double containment vessels sealed with dual O-rings. The O-ring compound is Parker Seals V0835-75, based on Viton{reg_sign} GLT fluoroelastomer. This work evaluates the performance of the V0835-75 O-rings at accelerated-aging conditions. The results will be used to develop a lifetime prediction model for O-rings in KAMS.
Date:
January 10, 2008
Creator:
Hoffman, E
Object Type:
Article
System:
The UNT Digital Library
Accelerated Geothermal Resource Development in the Great Basin Through Enhanced Public Awareness and Outreach to Shareholders.
The Great Basin Center for Geothermal Energy conducted work encompassing two main tasks. We (1) produced a web-based, stakeholder geothermal information system for Nevada geothermal data relevant to assessing and developing geothermal resources, and (2) we held informational stakeholder workshops (both as part of GeoPowering the West Initiative). The objective of this grant was to conduct workshops and fund database and web development activities. This grant funds salaries for web and database developers and part of the administrative assistant who helps to coordinate and organize workshops, and maintain selected databases.
Date:
April 10, 2002
Creator:
Taranik, James V.; Oppliger, Gary & Sawatsky, Don
Object Type:
Report
System:
The UNT Digital Library
Accelerating a random forest classifier: multi-core, GP-GPU, or FPGA?
None
Date:
January 10, 2012
Creator:
Van Essen, B. C.; Macaraeg, C. C.; Prenger, R. & Gokhale, M.
Object Type:
Article
System:
The UNT Digital Library
Accelerating Atomic Orbital-based Electronic Structure Calculation via Pole Expansion plus Selected Inversion
We describe how to apply the recently developed pole expansion plus selected inversion (PEpSI) technique to Kohn-Sham density function theory (DFT) electronic structure calculations that are based on atomic orbital discretization. We give analytic expressions for evaluating charge density, total energy, Helmholtz free energy and atomic forces without using the eigenvalues and eigenvectors of the Kohn-Sham Hamiltonian. We also show how to update the chemical potential without using Kohn-Sham eigenvalues. The advantage of using PEpSI is that it has a much lower computational complexity than that associated with the matrix diagonalization procedure. We demonstrate the performance gain by comparing the timing of PEpSI with that of diagonalization on insulating and metallic nanotubes. For these quasi-1D systems, the complexity of PEpSI is linear with respect to the number of atoms. This linear scaling can be observed in our computational experiments when the number of atoms in a nanotube is larger than a few hundreds. Both the wall clock time and the memory requirement of PEpSI is modest. This makes it even possible to perform Kohn-Sham DFT calculations for 10,000-atom nanotubes on a single processor. We also show that the use of PEpSI does not lead to loss of accuracy required in …
Date:
February 10, 2012
Creator:
Lin, Lin; Chen, Mohan; Yang, Chao & He, Lixin
Object Type:
Article
System:
The UNT Digital Library
Acceleration of Polarized Beams Using Multiple Strong Partial Siberian Snakes
Acceleration of polarized protons in the energy range of 5 to 25 GeV is particularly difficult since depolarizing spin resonances are strong enough to cause significant depolarization but full Siberian snakes cause intolerably large orbit excursions. Using a 20-30% partial Siberian snake both imperfection and intrinsic resonances can be overcome. Such a strong partial Siberian snake was designed for the Brookhaven AGS using a dual pitch helical superconducting dipole. Multiple strong partial snakes are also discussed for spin matching at beam injection and extraction.
Date:
October 10, 2004
Creator:
Roser, T.; Ahrens, L.; Bai, M.; Courant, E.; Glenn, J. W.; Gupta, R. C. et al.
Object Type:
Article
System:
The UNT Digital Library
Acceptance test procedure for the master equipment list (MEL)database system -- phase I
The Waste Remediation System/.../Facilities Configuration Management Integration group has requested development of a system to help resolve many of the difficulties associated with management of master equipment list information. This project has been identified as Master Equipment List (MEL) database system. Further definition is contained in the system requirements specification (SRS), reference 7.
Date:
April 10, 1997
Creator:
Jech, J.B.
Object Type:
Report
System:
The UNT Digital Library
Acceptance test report for core sample trucks 3 and 4
The purpose of this Acceptance Test Report is to provide documentation for the acceptance testing of the rotary mode core sample trucks 3 and 4, designated as HO-68K-4600 and HO-68K-4647, respectively. This report conforms to the guidelines established in WHC-IP-1026, ``Engineering Practice Guidelines,`` Appendix M, ``Acceptance Test Procedures and Reports.`` Rotary mode core sample trucks 3 and 4 were based upon the design of the second core sample truck (HO-68K-4345) which was constructed to implement rotary mode sampling of the waste tanks at Hanford. Successful completion of acceptance testing on June 30, 1995 verified that all design requirements were met. This report is divided into four sections, beginning with general information. Acceptance testing was performed on trucks 3 and 4 during the months of March through June, 1995. All testing was performed at the ``Rock Slinger`` test site in the 200 West area. The sequence of testing was determined by equipment availability, and the initial revision of the Acceptance Test Procedure (ATP) was used for both trucks. Testing was directed by ICF-KH, with the support of WHC Characterization Equipment Engineering and Characterization Project Operations. Testing was completed per the ATP without discrepancies or deviations, except as noted.
Date:
April 10, 1996
Creator:
Corbett, J. E.
Object Type:
Report
System:
The UNT Digital Library
Acceptance test report for the L-070 project
This document contains the acceptance test report for the mechanical equipment and instrumentation installed per the L-070 project. The systems that were tested were the pump controls for the 3906 Lift Station and the 350-A Lift Station. The verification of an alarm signal installed between the 3906 lift station and the 340 Facility (3707F Bldg.) was also performed.
Date:
July 10, 1996
Creator:
Loll, C.M., Westinghouse Hanford
Object Type:
Report
System:
The UNT Digital Library
Accident consequence calculations for project W-058 safetyanalysis
Accident consequence analyses have been performed for Project W-058, the Replacement Cross Site Transfer System. using the assumption and analysis techniques developed for the Tank Remediation Waste system Basis for Interim Operation. most potential accident involving the FISTS are bounded by the TWRS BIO analysis. However, the spray leak and pool leak scenarios require revised analyses since the RCSTS design utilizes larger diameter pipe and higher pressures than those analyzed in the TWRS BIO. Also the volume of diversion box and vent station are larger than that assumed for the valve pits in the TWRS BIO, which effects results of sprays or spills into the pits. the revised analysis for the spray leak is presented in Section 2, for the above ground spill in Section 3, for the presented in Section 2, for the above ground spill in Section 3, for the subsurface spill forming a pool in Section 4, and for the subsurface pool remaining subsurface in Section 5. The conclusion from these sections are summarized below.
Date:
June 10, 1997
Creator:
Van Keuren, J.C.
Object Type:
Report
System:
The UNT Digital Library
Accident in Continuous-Dissolver Pilot Plant of Fluoride Volatility Project on May 15, 1957
A series of explosions, estimated at five, occurred over a period of ten seconds within the continuous dissolver pilot plant, of the Fluoride Volatility Project on May 15, 1957. The explosive reactions occurred in the dissolver vessels as a result of violent chemical reactions between uranium and an interhalogen mixture. Just what the conditions were which triggered the explosions, have not been definitely established. Nevertheless, based upon the evidence which has been collected, several possible explanations, listed according to probability, are presented. A number of recommendations are included to be followed before operation of the pilot plant is resumed. These recommendations relate to additional laboratory research, equipment design, facility design, and use of a review committee. Safety rules for handling BrF/ sub 3/, BrF/sub 5/, ClF/sub 3/, and Br/sub 2/ are appended. (C.H.)
Date:
July 10, 1957
Creator:
Strickland, G.; Horn, F. L.; Johnson, R. & Dwyer, O. E.
Object Type:
Report
System:
The UNT Digital Library
Accountability equations for plutonium and tritium yields for PT-IP-305-C at 105-H
It is necessary to provide accountability tables and equations for use in routine product buildup predictions for the duration of the E-N and blanket loads charged under PT-IP-350-C. Recommended values are given.
Date:
May 10, 1961
Creator:
Nechodom, W. S.
Object Type:
Report
System:
The UNT Digital Library
ACETYL-COA CLEAVAGE AND SYNTHESIS IN METHANOGENS; CHARACTERIZATION OF SUBOMPONENT INTERACTIONS IN THE ACETYL-COA DECARBONYLASE/SYNTHASE MULTIENZYME COMPLEX
The work reported resulted in much new insight into unusual mechanisms of metalloenzymes involved in anaerobic metabolism in methanogens, other archaea, and bacteria.
Date:
October 10, 2013
Creator:
GRAHAM, DAVID A.
Object Type:
Report
System:
The UNT Digital Library
Achieving high sustained performance in an unstructured mesh CFD application
This paper highlights a three-year project by an interdisciplinary team on a legacy F77 computational fluid dynamics code, with the aim of demonstrating that implicit unstructured grid simulations can execute at rates not far from those of explicit structured grid codes, provided attention is paid to data motion complexity and the reuse of data positioned at the levels of the memory hierarchy closest to the processor, in addition to traditional operation count complexity. The demonstration code is from NASA and the enabling parallel hardware and (freely available) software toolkit are from DOE, but the resulting methodology should be broadly applicable, and the hardware limitations exposed should allow programmers and vendors of parallel platforms to focus with greater encouragement on sparse codes with indirect addressing. This snapshot of ongoing work shows a performance of 15 microseconds per degree of freedom to steady-state convergence of Euler flow on a mesh with 2.8 million vertices using 3072 dual-processor nodes of ASCI Red, corresponding to a sustained floating-point rate of 0.227 Tflop/s.
Date:
December 10, 1999
Creator:
Keyes, D E; Anderson, W K; Gropp, W D; Kaushik, D K & Smith, B F
Object Type:
Article
System:
The UNT Digital Library
Acoustic waves in random ensembles of magnetic fluxes
To analyze the observational data and provide the appropriate diagnostic procedure for photospheric manifestation of solar oscillations it is necessary to take into account strong inhomogeneity of solar atmosphere with respect to distribution of magnetic fields. We study the collective phenomena in the propagation of acoustic waves and unsteady wave-packets through quite regions, sunspots and plages, including time-dependent response of these regions to solar oscillations, the energy transfer mechanisms, frequency shift effects and reradiation of the acoustic waves in higher layers of atmosphere. We show that the dynamics of differently magnetized regions, their dispersion properties, and their response to the propagation of acoustic waves are completely different. We describe the effects caused by the specific distribution and randomness of magnetic flux tubes, which can be observed and which can provide the tools for diagnostic goals.
Date:
October 10, 1995
Creator:
Ryutova, M.P.
Object Type:
Article
System:
The UNT Digital Library
ACT and ACTIVE codes for calculating neutron-induced activation
None
Date:
April 10, 1973
Creator:
Lessler, R. M.; Alley, W. E. & Green, J. B.
Object Type:
Report
System:
The UNT Digital Library
Actinic characterization of EUV bump-type phase defects
Despite tremendous progress and learning with EUV lithography, quantitative experimental information about the severity of point-like phase defects remains in short supply. We present a study of measured, EUV aerial images from a series of well-characterized, open-field, bump-type programmed phase defects, created on a substrate before multilayer deposition.
Date:
January 10, 2011
Creator:
Goldberg, Kenneth A.; Mochi, Iacopo & Liang, Ted
Object Type:
Article
System:
The UNT Digital Library
Actinide removal from aqueous solution with activated magnetite
An actinide aqueous waste treatment process using activated magnetite has been developed at Rocky Flats. The use and effectiveness of various magnetites in lowering actinide concentrations in aqueous solution are described. Experiments indicate that magnetite particle size and pretreatment (activation of the magnetite surface with hydroxyl ions greatly influence the effective use of magnetite as an actinide adsorbent. With respect to actinide removal, Ba(OH)/sub 2/-activated magnetite was more effective over a broader pH range than was NaOH-activated magnetite. About 50% less Ba(OH)/sub 2/-activated magnetite was required to lower plutonium concentration from 10/sup -4/ to 10/sup -8/ g/l. 7 refs., 8 tabs.
Date:
August 10, 1987
Creator:
Kochen, R.L. & Thomas, R.L. (ed.)
Object Type:
Report
System:
The UNT Digital Library
ACTION CONCENTRATION FOR MIXTURES OF VOLATILE ORGANIC COMPOUNDS (VOC) & METHANE & HYDROGEN
Waste containers may contain volatile organic compounds (VOCs), methane, hydrogen and possibly propane. These constituents may occur individually or in mixtures. Determining if a waste container contains a flammable concentration of flammable gases and vapors (from VOCs) is important to the safety of the handling, repackaging and shipping activities. This report provides the basis for determining the flammability of mixtures of flammable gases and vapors. The concentration of a mixture that is at the lowest flammability limit for that mixture is called the action concentration. The action concentration can be determined using total VOC concentrations or actual concentration of each individual VOC. The concentrations of hydrogen and methane are included with the total VOC or individual VOC concentration to determine the action concentration. Concentrations below this point are not flammable. Waste containers with gas/vapor concentrations at or above the action concentration are considered flammable.
Date:
July 10, 2006
Creator:
MARUSICH, R.M.
Object Type:
Report
System:
The UNT Digital Library
Activation of theMercury Laser System: A Diode-Pumped Solid-State Laser Driver for Inertial Fusion
Initial measurements are reported for the Mercury laser system, a scalable driver for rep-rated inertial fusion energy. The performance goals include 10% electrical efficiency at 10 Hz and 100 J with a 2-10 ns pulse length. We report on the first Yb:S-FAP crystals grown to sufficient size for fabricating full size (4 x 6 cm) amplifier slabs. The first of four 160 kW (peak power) diode arrays and pump delivery systems were completed and tested with the following results: 5.5% power droop over a 0.75 ms pulse, 3.95 nm spectral linewidth, far field divergence of 14.0 mrad and 149.5 mrad in the microlensed and unmicrolensed directions respectively, and 83% optical-to-optical transfer efficiency through the pump delivery system.
Date:
September 10, 2001
Creator:
Bayramian, A. J.; Beach, R. J.; Bibeau, C.; Ebbers, C. A.; Freitas, B. L.; Kanz, V. K. et al.
Object Type:
Article
System:
The UNT Digital Library