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Laboratory directed research and development program FY 2003

Description: The Ernest Orlando Lawrence Berkeley National Laboratory (Berkeley Lab or LBNL) is a multi-program national research facility operated by the University of California for the Department of Energy (DOE). As an integral element of DOE's National Laboratory System, Berkeley Lab supports DOE's missions in fundamental science, energy resources, and environmental quality. Berkeley Lab programs advance four distinct goals for DOE and the nation: (1) To perform leading multidisciplinary research in the… more
Date: March 27, 2004
Creator: Hansen, Todd
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Rheological and Physical Properties of Hanford Radioactive LAW AZ-102 Pretreated Waste and Melter Feed

Description: The purpose and objective of this task was to measure and report the physical and rheological properties, pH, and PSD of a radioactive Hanford tank sample, 241-AZ-102 pretreated by the reference RPP-WTP pretreatment process at SRTC. The LAW pretreated wastes and melter feeds were characterized at two different sodium molarities in accordance with RPP-WTP R and T guidelines for characterization. The initial AZ-102 pretreated waste was received at a concentration of 4.38M Na. This pretreated wast… more
Date: April 30, 2004
Creator: HANSEN, ERICHK
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Physical Properties of Kaolin/Sand Slurry Used During Submersible Mixer Pump Tests at TNX

Description: The purpose of this task is to characterize the physical properties of kaolin/sand slurry used to test the performance of a new submersible mixer pump which is undergoing performance testing at the TNT Waste Tank mockup facility. Three different sample locations, the SMP cooling water exit, the SMP fluid flow field, and SMP effective cleaning radius were used for sampling over the seven day test. The physical properties determinations for the kaolin/sand slurry samples include rheology, weight … more
Date: August 18, 2004
Creator: HANSEN, ERICHK.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Physical Characterization of Florida International University Simulants

Description: Florida International University shipped Laponite, clay (bentonite and kaolin blend), and Quality Assurance Requirements Document AZ-101 simulants to the Savannah River Technology Center for physical characterization and to report the results. The objectives of the task were to measure the physical properties of the fluids provided by FIU and to report the results. The physical properties were measured using the approved River Protection Project Waste Treatment Plant characterization procedure … more
Date: August 19, 2004
Creator: HANSEN, ERICHK.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Gothic Model of BWR Secondary Containment Drawdown Analyses

Description: This article introduces a GOTHIC version 7.1 model of the Secondary Containment Reactor Building Post LOCA drawdown analysis for a BWR. GOTHIC is an EPRI sponsored thermal hydraulic code. This analysis is required by the Utility to demonstrate an ability to restore and maintain the Secondary Containment Reactor Building negative pressure condition. The technical and regulatory issues associated with this modeling are presented. The analysis includes the affect of wind, elevation and thermal imp… more
Date: October 6, 2004
Creator: Hansen, Paul N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effects of the Electron Energy Distribution Function on Modeled X-ray Spectra

Description: This paper presents the results of a broad investigation into the effects of the electron energy distribution function on the predictions of non-LTE collisional-radiative atomic kinetics models. The effects of non-Maxwellian and suprathermal (''hot'') electron distributions on collisional rates (including three-body recombination) are studied. It is shown that most collisional rates are fairly insensitive to the functional form and characteristic energy of the electron distribution function as … more
Date: February 19, 2004
Creator: Shlyaptseva, A S & Hansen, S B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Black carbon emissions in the United Kingdom during the past four decades: An empirical analysis

Description: We use data from a unique 40-year record of 150 urban and rural stations in the ''Black Smoke and SO2 Network'' in Great Britain to infer information about sources of atmospheric black carbon (BC). The data show a rapid decline of ambient atmospheric BC between 1962 and the early 1990s that exceeds the decline in official estimates of BC emissions based only on amount of fuel use and mostly fixed emission factors. This provides empirical confirmation of the existence and large impact of a time-… more
Date: April 22, 2004
Creator: Novakov, T. & Hansen, J.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Simulations of the pipe overpack to compute constitutive model parameters for use in WIPP room closure calculations.

Description: The regulatory compliance determination for the Waste Isolation Pilot Plant includes the consideration of room closure. Elements of the geomechanical processes include salt creep, gas generation and mechanical deformation of the waste residing in the rooms. The WIPP was certified as complying with regulatory requirements based in part on the implementation of room closure and material models for the waste. Since the WIPP began receiving waste in 1999, waste packages have been identified that ar… more
Date: July 1, 2004
Creator: Park, Byoung Yoon & Hansen, Francis D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of the Electron Energy Distribution Function on Line and Continuum Emission

Description: Effects of suprathermal (''hot'') electrons on the predictions of K- and L-shell non-LTE collisional-radiative atomic kinetics models are presented through an investigation of various electron distribution functions (EDFs) on collisional rates and spectra. It is shown that while most collisional rates are fairly insensitive to the functional form and characteristic energy of the hot electrons as long as their characteristic energy is larger than the threshold energy for the collisional process,… more
Date: March 18, 2004
Creator: Hansen, S. B. & Shlyaptseva, A. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Resolution of the Long-Standing Overprediction of the Resonance to Intercombination Line-Intensity Ratio in mid-Z Neonlike Ions

Description: The Ne-like resonance 2p{sup 6} {sup 1}S-2p{sup 5}3d{sup 1}P(3C) to intercombination 2p{sup 6} {sup 1}S-2p{sup 5}3d{sup 1}D(3D) line-intensity ratio R(3C/3D) has been extensively studied through high-accuracy measurements and calculations of atomic structure and collision cross sections. However, even state-of-the-art relativistic multiconfiguration atomic-physics codes generally predict values of R(3C/3D) that are significantly larger than those observed in coronal-density experiments. In this… more
Date: June 16, 2004
Creator: Fournier, K B & Hansen, S B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

DEVELOPMENT OF A FABRICATION PROCESS FOR SOL-GEL/METAL HYDRIDE COMPOSITE GRANULES

Description: An external gelation process was developed to produce spherical granules that contain metal hydride particles in a sol-gel matrix. Dimensionally stable granules containing metal hydrides are needed for applications such as hydrogen separation and hydrogen purification that require columns containing metal hydrides. Gases must readily flow through the metal hydride beds in the columns. Metal hydrides reversibly absorb and desorb hydrogen and hydrogen isotopes. This is accompanied by significant … more
Date: February 23, 2004
Creator: Hansen, E; Eric Frickey, E & Leung Heung, L
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Improved Pinhole-Apertured Point-Projection Backlighter Geometry

Description: Pinhole-apertured point-projection x-ray radiography is an important diagnostic technique for obtaining high resolution, high contrast, and large field-of-view images used to diagnose the hydrodynamic evolution of high energy density experiments. In this technique, a pinhole aperture is placed between a laser irradiated foil (x-ray source) and an imaging detector. In this letter, we present an improved backlighter geometry that utilizes a tilted pinhole for debris mitigation and a front-side il… more
Date: April 13, 2004
Creator: Blue, B.; Robey, H. F. & Hansen, J. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Tank 38H Saltcake Core and Supernate Sample Analysis

Description: This report provides details of the characterization of Tank 38H saltcake and supernate samples pulled in September 2003. The core sample HTF-E-03-114 contained approximately 4 inches of saltcake, which was soupy and brown with white chunks, and contained less than 15 mL of cloudy free liquid. The undrained bulk saltcake had a water content of 16.8 percentage weight and a bulk density that was approximately 1.94 g/cm3 at full saturation. The 137Cs activity of the bulk saltcake in sample HTF-E-0… more
Date: July 7, 2004
Creator: Martino, Christopher J.; Nichols, R. L.; McCabe, D. J. & Hansen, E. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

X-ray Spectroscopy with Elliptical Crystals and Face-On Framing Cameras

Description: X-ray spectrometers using elliptically bent crystals have desirable properties for applications requiring broad spectral coverage, good spectral resolution, and minimized source broadening. Previous work used custom-positioned film or microchannel plate detectors. They find it is also useful and cost-effective to field elliptical crystals in existing snouts on the face-on gated microchannel plate framing cameras commonly used at many facilities. they numerically explored the full design space (… more
Date: April 16, 2004
Creator: Heeter, R.; Emig, J.; Fournier, K.; Hansen, S.; May, M. & Young, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Design, Construction, and Operation of a Laboratory Scale Reactorfor the Production of High-Purity, Isotopically Enriched Bulksilicon

Description: The design and operation of a recirculating flow reactor designed to convert isotopically enriched silane to polycrystalline Si with high efficiency and chemical purity is described. The starting material is SiF{sub 4}, which is enriched in the desired isotope by a centrifuge method and subsequently converted to silane. In the reactor, the silane is decomposed to silicon on the surface of a graphite starter rod (3 mm diameter) heated to 700-750 C. Flow and gas composition (0.3-0.5% silane in hy… more
Date: December 20, 2004
Creator: Ager, J. W., III; Beeman, J. W.; Hansen, W. L. & Haller, E. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Visual Data Exploration and Analysis -- Report of theVisualization Breakout Session at the 2003 SCaLeS Workshop - VolumeII

Description: This article describes the role of scientific visualizationin computational and experimental sciences with emphasis upon futureresearch challenges.
Date: January 12, 2004
Creator: Bethel, W.; Frank, R.; Fulcomer, S.; Hansen, C.; Joy, k.; Kohl, J. et al.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

Visual Data Exploration and Analysis - Report of the VisualizationBreakout Session at the 2003 SCaLeS Workshop - Volume II

Description: This document is the report from the Visualization breakoutsession at the SCaLeS (Science Case for Large-scale Simulation) workshopheld in 2003 in Bethesda, MD. The document presents current researchchallenges in visualization of large-scale scientific data.
Date: January 12, 2004
Creator: Bethel, W, E.; Frank, R.; Fulcomer, S.; Hansen, C.; Joy, K.; Kohl, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Low Wind Speed Turbine Project Conceptual Design Study: Advanced Independent Pitch Control; July 30, 2002--July 31, 2004 (Revised)

Description: AES conducted a conceptual study of independent pitch control using inflow angle sensors. The control strategy combined input from turbine states (rotor speed, rotor azimuth, each blade pitch) with inflow angle measurements (each blade angle of attack at station 11 of 15) to derive blade pitch demand signals. The controller reduced loads sufficiently to allow a 10% rotor extension and reduce COE by 6.3%.
Date: December 1, 2004
Creator: Olsen, T.; Lang, E.; Hansen, A. C.; Cheney, M. C.; Quandt, G.; VandenBosche, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Studies of laser-driven radiative blast waves

Description: We have performed two sets of experiments looking at laser-driven radiating blast waves. In one set of experiments the effect of a drive laser's passage through a background gas on the hydrodynamical evolution of blast waves was examined. It was found that the laser's passage heats a channel in the gas, creating a region where a portion of the blast wave front had an increased velocity, leading to the formation of a bump-like protrusion on the blast wave. The second set of experiments involved … more
Date: April 29, 2004
Creator: Edwards, M J; Hansen, J; Edens, A; Ditmire, T; Adams, R; Rambo, P et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The effect of a short wavelength mode on the evolution of a long wavelength perturbation driven by a strong blast wave

Description: Shock-accelerated material interfaces are potentially unstable to both the Richtmyer-Meshkov and Rayleigh-Taylor instabilities. Shear that develops along with these instabilities in turn drives the Kelvin-Helmholtz instability. When driven by strong shocks, the evolution and interaction of these instabilities is further complicated by compressibility effects. In this paper, we present a computational study of the formation of jets at strongly driven hydrodynamically unstable interfaces, and the… more
Date: March 16, 2004
Creator: Miles, A. R.; Edwards, M.; Blue, B.; Hansen, J. F.; Robey, H. F.; Drake, R. P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Axial and Temporal Gradients in Mo Z Pinches

Description: Three nested molybdenum wire arrays with initial outer diameters of 45, 50, and 55 mm were imploded by the {approx} 20 MA, 90 ns rise-time current pulse of Sandia's Z accelerator. The implosions generated Mo plasmas with approximately 10% of the array's initial mass reaching Ne-like and nearby ionization stages. These ions emitted 2 - 4 keV L-shell x-rays with radiative powers approaching 10 TW. Mo L-shell spectra with axial and temporal resolution were captured and have been analyzed using a n… more
Date: July 14, 2004
Creator: LePell, P D; Hansen, S B; Shlyaptseva, A S; Coverdale, C; Deeney, C; Apruzese, J P et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evaporation, Rheology, And Vitrification Of A Pretreated Radioactive Hanford Tank 241-AN-104 Sample Mixed With Simulated Law SBS Recycle

Description: This study involved evaporation of the radioactive low activity waste AN-104 pretreated waste and a simulant LAW submerged bed scrubber recycle from Duratek blended at two different volume ratios. The AN104SBS35651 pretreated wastes were then blended with glass former chemicals, GFCs, and a single blend vitrified. The chemical and physical properties, during all phases of blending were characterized per Table 1-1. The AN-104 radioactive waste used for this study was initially characterized at S… more
Date: October 2004
Creator: Crowder, Mark L.; Hansen, Erich K.; Crawford, Charles L.; Daniel, William E., Jr.; Schumacher, Ray F.; Burket, Paul R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Study of High Mach Number Laser Driven Blast Waves

Description: The study of blast waves produced by intense lasers in gases is motivated by the desire to explore astrophysically relevant hydrodynamic phenomena in the laboratory. We have performed a systematic scan of laser produced blast waves and have examined the blast wave structure over a wide range of drive laser energy. Lasers with energies ranging from 10J-1000J illuminated a pin target in either xenon or nitrogen gas, creating a spherical blast wave. We observe a strongly radiating blast wave in xe… more
Date: February 26, 2004
Creator: Edens, A.; Ditmire, T.; Hansen, J. F.; Edwards, M. J.; Adams, R. G.; Rambo, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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