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Synthesis of Novel Extended Phases of Molecular Solids at High Pressures and Temperatures

Description: This study is for in-situ investigation of chemical bonding and molecular structure of low z-elements and simple molecular solids at high pressures and temperatures using 3rd-generation synchrotron x-ray diffraction. To understand the contribution of the empty d-electron orbital of Mg in relation to the formation of molecular solids like MgO, which is one of the important Earth lower mantle materials and MgB{sub 2}, which has recently been the focus of intense superconducting material research,… more
Date: March 30, 2004
Creator: Yoo, C; Evans, W & Cynn, H
Partner: UNT Libraries Government Documents Department
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Feasibility Study on Using Two Mixer Pumps for Tank 241-AY-102 Waste Mixing

Description: The current waste retrieval plan at Hanford calls for using two mixer pumps to mix the waste stored in double-shell Tank 214-AY-102. The objective of this evaluation was to determine whether two rotating 300-hp mixer pumps placed 22 ft (6.7 m) off-center in the tank could adequately mix the AY-102 waste. The tank currently contains high-level waste that is 248 inches (6.3 m) deep, comprising 62 inches (1.58 m) of sludge and 186 inches (4.72 m) of supernatant liquid (Galbraith et al. 2002). Base… more
Date: August 30, 2004
Creator: Onishi, Yasuo & Wells, Beric E.
Partner: UNT Libraries Government Documents Department
open access

PROPOSAL FOR A SILICON VERTEX TRACKER (VTX) FOR THE PHENIX EXPERIMENT.

Description: We propose the construction of a Silicon Vertex Tracker (VTX) for the PHENIX experiment at RHIC. The VTX will substantially enhance the physics capabilities of the PHENIX central arm spectrometers. Our prime motivation is to provide precision measurements of heavy-quark production (charm and beauty) in A+A, p(d)+A, and polarized p+p collisions. These are key measurements for the future RHIC program, both for the heavy ion program as it moves from the discovery phase towards detailed investigati… more
Date: March 30, 2004
Creator: AKIBA,Y.
Partner: UNT Libraries Government Documents Department
open access

Neutron and Charged-Particle Induced Cross Sections for Radiochemistry in the Region of Samarium, Europium, and Gadolinium

Description: We have developed a set of modeled nuclear reaction cross sections for use in radiochemical diagnostics. Systematics for the input parameters required by the Hauser-Feshbach statistical model were developed and used to calculate neutron and proton induced nuclear reaction cross sections in the mass region of samarium, europium and gadolinium (62 {le} Z {le} 64, 82 {le} N {le} 96).
Date: November 30, 2004
Creator: Hoffman, R. D.; Kelley, K.; Dietrich, F. S.; Bauer, R. & Mustafa, M.
Partner: UNT Libraries Government Documents Department
open access

Recharge Data Package for the 2005 Integrated Disposal Facility Performance Assessment

Description: Pacific Northwest National Laboratory assisted CH2M Hill Hanford Group, Inc., (CHG) by providing estimates of recharge rates for current conditions and long-term scenarios involving disposal in the Integrated Disposal Facility (IDF). The IDF will be located in the 200 East Area at the Hanford Site and will receive several types of waste including immobilized low-activity waste. The recharge estimates for each scenario were derived from lysimeter and tracer data collected by the IDF PA Project a… more
Date: June 30, 2004
Creator: Fayer, Michael J. & Szecsody, Jim E.
Partner: UNT Libraries Government Documents Department
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Neutron and Charged-Particle Induced Cross Sections for Radiochemistry for Isotopes of Scandium, Titanium, Vanadium, Chromium, Manganese, and Iron

Description: We have developed a set of modeled nuclear reaction cross sections for use in radiochemical diagnostics. Local systematics for the input parameters required by the Hauser-Feshbach statistical model were developed and used to calculate neutron and proton induced nuclear reaction cross sections in the mass region of scandium, titanium, vanadium, chromium, manganese, and iron (21 {le} Z {le} 26, 20 {le} N {le} 32).
Date: November 30, 2004
Creator: Kelley, K.; Hoffman, R. D.; Dietrich, F. S.; Bauer, R. & Mustafa, M.
Partner: UNT Libraries Government Documents Department
open access

Characterization of the Near-Field Transport and Dispersion of Vapors Released from the Headspaces of Hanford Site Underground Storage Tanks

Description: A parametric air dispersion analysis has been conducted to define the range of tank vapor concentrations from the Hanford Site underground tanks that can potentially occur in the worker breathing zones from active and passive releases from the waste tanks. The potential influences of tank farm specific release characteristics, ambient meteorological conditions, local farm surface roughness, and topographical influences are considered. The parametric approach allows consideration of the full ran… more
Date: July 30, 2004
Creator: Droppo, James G.
Partner: UNT Libraries Government Documents Department
open access

Establishment of a Cost-Effective and Robust Planning Basis for the Processing of M-91 Waste at the Hanford Site

Description: This report identifies and evaluates viable alternatives for the accelerated processing of Hanford Site transuranic (TRU) and mixed low-level wastes (MLLW) that cannot be processed using existing site capabilities. Accelerated processing of these waste streams will lead to earlier reduction of risk and considerable life-cycle cost savings. The processing need is to handle both oversized MLLW and TRU containers as well as containers with surface contact dose rates greater than 200 mrem/hr. This … more
Date: July 30, 2004
Creator: Johnson, Wayne L. & Parker, Brian M.
Partner: UNT Libraries Government Documents Department
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Lawrence Livermore National Laboratory (LLNL) Oxide Material Representation in the Material Identification and Surveillance (MIS) Program, Revision 2

Description: The Materials Identification and Surveillance (MIS) program was established within the 94-1 R&D Program to confirm the suitability of plutonium-bearing materials for stabilization, packaging, and long-term storage under DOE-STD-3013-2000. Oxide materials from different sites were chemically and physically characterized. The adequacy of the stabilization process parameters of temperature and duration at temperature (950 C and 2 hours) for eliminating chemical reactivity and reducing the mois… more
Date: June 30, 2004
Creator: Riley, D C & Dodson, K
Partner: UNT Libraries Government Documents Department
open access

FY04-Q4 REPORT: LX-17 MODELING

Description: TATB containing explosives tend to permanently expand as their temperatures are increased or thermally cycled, a phenomenon known as ''ratchet-growth.'' Mesoscale simulations using dissipative particle dynamics (DPD) have been carried out in order to study the geometric packing effects of TATB pressed powders under stress conditions. Further, our mesoscale simulations of polycrystalline TATB pressed powders have been used to predict hot-spot changes as a function of temperature (thermal cycling… more
Date: November 30, 2004
Creator: Gee, R & Fried, L
Partner: UNT Libraries Government Documents Department
open access

Dielectrophoretic Forces on the Nanoscale

Description: We have developed a method of calculation of the dielectrophoretic force on a nanoparticle in a fluid environment where variations in the electric field and electric field gradients are on the same nanoscale as the particle. The Boundary Element Dielectrophoretic Force (BEDF) method involves constructing a solvent-accessible or molecular surface surrounding the particle, calculating the normal component of the electric field at the surface boundary elements and then solving a system of linear e… more
Date: March 30, 2004
Creator: Schaldach, C M; Bourcier, W L; Wilson, W D & Paul, P H
Partner: UNT Libraries Government Documents Department
open access

W-519 Sagebrush Mitigation Project FY-2004 Final Review and Status

Description: This report summarizes activities conducted as mitigation for loss of sagebrush-steppe habitats due to Project W-519, the construction of the infrastructure for the Tank Waste Remediation System Vitrification Plant. The focus of this report is to provide a review and final status of mitigation actions performed through FY2004. Data collected since FY1999 have been included where appropriate. The Mitigation Action Plan (MAP) for Project W-519 prescribed three general actions to be performed as m… more
Date: September 30, 2004
Creator: Durham, Robin E. & Sackschewsky, Michael R.
Partner: UNT Libraries Government Documents Department
open access

Atmospheric Data Package for the 2004 Composite Analysis

Description: The purpose of this data package is to summarize our conceptual understanding of atmospheric transport and deposition, describe how this understanding will be simplified for numerical simulation as part of the 2004 Composite Analysis (i.e., implementation model), and finally to provide the input parameters needed for the simulations.
Date: April 30, 2004
Creator: Napier, Bruce A. & Ramsdell, James V.
Partner: UNT Libraries Government Documents Department
open access

Thermodynamics and Structure of Plutonium Alloys

Description: The goal of this project was to investigate the chemical and structural effects of gallium and impurity elements, iron and nickel, on the phase behavior and crystallography of Pu-Ga alloys. This was done utilizing a theoretical chemical approach to predict binary and ternary alloy energetics, phase stability, and transformations. The modeling results were validated with experimental data derived from the synthesis of selected alloys and advanced characterization tools. The ultimate goal of this… more
Date: January 30, 2004
Creator: Allen, P G; Turchi, P A & Gallegos, G F
Partner: UNT Libraries Government Documents Department
open access

Geochemical Data Package for the 2005 Hanford Integrated Disposal Facility Performance Assessment

Description: CH2M HILL Hanford Group, Inc. (CH2M HILL) is designing and assessing the performance of an integrated disposal facility (IDF) to receive low-level waste (LLW), mixed low-level waste (MLLW), immobilized low-activity waste (ILAW), and failed or decommissioned melters. The CH2M HILL project to assess the performance of this disposal facility is the Hanford IDF Performance Assessment (PA) activity. The goal of the Hanford IDF PA activity is to provide a reasonable expectation that the disposal of t… more
Date: September 30, 2004
Creator: Krupka, Kenneth M.; Serne, R JEFFREY. & Kaplan, D I.
Partner: UNT Libraries Government Documents Department
open access

Analysis of Potential Free-Rider Eligibility for a Proposed Commercial Building Lighting Tax Deduction

Description: The report provides estimates of the potential volume of ''free riders'', in terms of both eligible square footage and associated available tax deductions, in a proposed commercial building lighting tax amendment to the 2003 Energy Bill. Determination of the actual tax rate for businesses and how the amendment may impact tax revenue collected by the treasury is beyond the scope of this effort. Others, such as the Treasury itself, are best equipped to make their own estimates of the eventual imp… more
Date: September 30, 2004
Creator: Winiarski, David W.; Richman, Eric E. & Biyani, Rahul K.
Partner: UNT Libraries Government Documents Department
open access

Local Impacts of Mercury Emissions From Coal Fired Power Plants.

Description: A thorough quantitative understanding of the processes of mercury emissions, deposition, and translocation through the food chain is currently not available. Complex atmospheric chemistry and dispersion models are required to predict concentration and deposition contributions, and aquatic process models are required to predict effects on fish. There are uncertainties in all of these predictions. Therefore, the most reliable method of understanding impacts of coal-fired power plants on Hg deposi… more
Date: March 30, 2004
Creator: Sullivan, T. M.; Bowerman, B.; Adams, J.; Lipfert, D. D.; Morris, S. M.; Bando, A. et al.
Partner: UNT Libraries Government Documents Department
open access

Historical Doses from Tritiated Water and Tritiated Hydrogen Gas Relesed to the Atmosphere from Lawrence Livermore National Laboratory (LLNL) Part 1. Description of Tritium Dose Model (DCART) for Chronic Releases from LLNL

Description: DCART (Doses from Chronic Atmospheric Releases of Tritium) is a spreadsheet model developed at Lawrence Livermore National Laboratory (LLNL) that calculates doses from inhalation of tritiated hydrogen gas (HT), inhalation and skin absorption of tritiated water (HTO), and ingestion of HTO and organically bound tritium (OBT) to adult, child (age 10), and infant (age 6 months to 1 year) from routine atmospheric releases of HT and HTO. DCART is a deterministic model that, when coupled to the risk a… more
Date: June 30, 2004
Creator: Peterson, S
Partner: UNT Libraries Government Documents Department
open access

KCAT, Xradia, ALS and APS Performance Summary

Description: At Lawrence Livermore National Laboratory (LLNL) particular emphasis is being placed on the nondestructive characterization (NDC) of components, subassemblies and assemblies of millimeter-size extent with micrometer-size features (mesoscale). These mesoscale objects include materials that vary widely in composition, density, geometry and embedded features. Characterizing these mesoscale objects is critical for corroborating the physics codes that underlie LLNL's Stockpile Stewardship mission. I… more
Date: September 30, 2004
Creator: Waters, A.; Martz, H. & Brown, W.
Partner: UNT Libraries Government Documents Department
open access

Environmental Molecular Sciences Laboratory 2003 Annual Report

Description: This 2003 Annual Report describes the research and accomplishments of staff and users of the W.R. Wiley Environmental Molecular Sciences Laboratory (EMSL), located in Richland, Washington. EMSL is a multidisciplinary, national scientific user facility and research organization, operated by Pacific Northwest National Laboratory (PNNL) for the U.S. Department of Energy's Office of Biological and Environmental Research. The resources and opportunities within the facility are an outgrowth of the U.… more
Date: April 30, 2004
Creator: White, Julia C.
Partner: UNT Libraries Government Documents Department
open access

Quantification of Fugitive Reactive Alkene Emissions From Petrochemical Plants With Perfluorocarbon Tracers.

Description: Recent studies demonstrate the impact of fugitive emissions of reactive alkenes on the atmospheric chemistry of the Houston Texas metropolitan area (1). Petrochemical plants located in and around the Houston area emit atmospheric alkenes, such as ethene, propene and 1,3-butadiene. The magnitude of emissions is a major uncertainty in assessing their effects. Even though the petrochemical industry reports that fugitive emissions of alkenes have been reduced to less than 0.1% of daily production, … more
Date: June 30, 2004
Creator: Senum, G. I. & Dietz, R. N.
Partner: UNT Libraries Government Documents Department
open access

Waste Container and Waste Package Performance Modeling to Support Safety Assessment of Low and Intermediate-Level Radioactive Waste Disposal.

Description: Prior to subsurface burial of low- and intermediate-level radioactive wastes, a demonstration that disposal of the wastes can be accomplished while protecting the health and safety of the general population is required. The long-time frames over which public safety must be insured necessitates that this demonstration relies, in part, on computer simulations of events and processes that will occur in the future. This demonstration, known as a Safety Assessment, requires understanding the perform… more
Date: June 30, 2004
Creator: Sullivan, T.
Partner: UNT Libraries Government Documents Department
open access

Flammable Gas Release Estimates for Modified Sluicing Retrieval of Waste from Selected Hanford Single-Shell Tanks

Description: This report is Revision 2 of PNNL-14271. Revision 1 expanded the analysis of interstitial liquid drainage-induced gas releases to address a general retrieval scenario (the previous version of this report assumed a center-out retrieval approach and conditions). Tank waste conditions (waste volumes, interstitial liquid levels, temperatures, retained gas void fractions, etc.) were also updated in Revision 1. Revision 2 extends the analysis to address water addition rates of 110 gpm and brine pump-… more
Date: September 30, 2004
Creator: Huckaby, James L. & Wells, Beric E.
Partner: UNT Libraries Government Documents Department
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