46 Matching Results

Search Results

Results: 1 - 24 next
open access

Second Generation Advanced Reburning for High Efficiency NOx Control

Description: This project is designed to develop a family of novel NO{sub x} control technologies, called Second Generation Advanced Reburning (SGAR) which has the potential to achieve 90+ NO{sub x} control in coal fired boilers at a significantly lower cost than Selective Catalytic Reduction. The ninth reporting period in Phase II (October 1-December 31, 1999) included preparation of the 10 x 10{sup 6} Btu/hr Tower Furnace for tests and setting the SGAR model to predict process performance under Tower Furn… more
Date: December 31, 1999
Creator: Zamansky, Vladimir M. & Lissianski, Vitali V.
Partner: UNT Libraries Government Documents Department
open access

Combustion 2000

Description: This report presents work carried out under contract DE-AC22-95PC95144 ''Combustion 2000 - Phase II.'' The goals of the program are to develop a coal-fired high performance power generation system (HIPPS) that is capable of: {lg_bullet} thermal efficiency (HHV) {ge} 47% {lg_bullet} NOx, SOx, and particulates {le} 10% NSPS (New Source Performance Standard) {lg_bullet} coal providing {ge} 65% of heat input {lg_bullet} all solid wastes benign {lg_bullet} cost of electricity {le} 90% of present pla… more
Date: December 31, 1999
Partner: UNT Libraries Government Documents Department
open access

Source Signatures of Fine Particulate Matter from Petroleum Refining and Fuel Use

Description: Combustion experiments were carried out on four different residual fuel oils in a 732 kW boiler. Particulate matter (PM) emission samples were separated aerodynamically by a cyclone into fractions that were nominally less than and greater than 2.5 microns in diameter. However, examination of several of the samples by computer-controlled scanning electron microscopy (CCSEM) revealed that part of the <2.5 micron fraction (PM{sub 2.5}) in fact consists of carbonaceous cenospheres and vesicular … more
Date: December 31, 1999
Creator: Huffman, Gerald P.; Huggins, Frank E.; Shah, Naresh & Huggins, Robert
Partner: UNT Libraries Government Documents Department
open access

Engineering Development of Coal-Fired High-Performance Power Systems Progress Report: October-December 1999

Description: A High Performance Power System (HIPPS) is being developed. This system is a coal-fired, combined cycle plant with indirect heating of gas turbine air. Foster Wheeler Development Corporation and a team consisting of Foster Wheeler Energy Corporation, Bechtel Corporation, University of Tennessee Space Institute and Westinghouse Electric Corporation are developing this system. In Phase 1 of the project, a conceptual design of a commercial plant was developed. Technical and economic analyses indic… more
Date: December 31, 1999
Creator: Tsuo, York
Partner: UNT Libraries Government Documents Department
open access

Montana Organization for Research in Energy (MORE) Final Report

Description: MORE is a consortium of educational, governmental, and industrial partners in cooperation with the state's Tribal colleges. Formed in 1994, the objectives are to develop and promote energy-related research and education in the state of Montana and the Northwestern region. Specifically, they set out to: (1) promote collaboration and cooperation among Montana's Colleges and Universities; (2) maximize use of existing personnel and resources; (3) foster partnerships with industries, state agencies,… more
Date: December 31, 1999
Creator: Bromenshenk, Jerry
Partner: UNT Libraries Government Documents Department
open access

Chemical Decomposition of High-Level Nuclear Waste Storage/Disposal Glasses Under Irradiation

Description: In the United States alone there are 100 million gallons of high-level nuclear wastes (HLWs) in various chemical forms awaiting eventual disposal in geologic repositories. For safety in handling and transport from their present underground storage tanks to their final burial sites, much of the HLWs are being immobilized by vitrification. A further virtue of HLW vitrification is the fact that the glass may serve as an additional, non-geologic barrier to the dispersal of these radio-toxins into t… more
Date: December 31, 1999
Creator: Griscom, David L. & Merzbacher, Celia I.
Partner: UNT Libraries Government Documents Department
open access

Evaluation Of Isotopic Diagnostics For Subsurface Characterization And Monitoring : Field Experiments At The Tan And RWMC (SDA) Sites, Ineel

Description: The purpose of this project was to explore and refine applications of isotope measurements for guiding environmental remediation strategies. The isotopic compositions of samples from field sites were analyzed to address both basic scientific issues and site-specific problems. Initial efforts were concentrated on two sites at the Idaho National Engineering and Environmental Laboratory (INEEL). During the final year of the project, the focus of work was shifted to the Hanford site in Washington. … more
Date: December 31, 1999
Creator: DePaolo, Donald J.
Partner: UNT Libraries Government Documents Department
open access

Experimental Determination of Contaminant Metal Mobility as a Function of Temperature, Time, and Solution Chemistry

Description: During the FY96-FY99 funding cycle we examined the uptake of aqueous strontium onto goethite, kaolinite, and amorphous silica surfaces as a function of pH, total strontium, and temperature. Our overall goal was to produce a mechanistic sorption model that can be used in reaction-transport calculations to predict the mobility and attenuation of radioactive strontium (90Sr) in the environment. Our approach was to combine structural information derived from synchrotron-based x-ray absorption spect… more
Date: December 31, 1999
Creator: Carroll, Susan A. & O'Day, Peggy A.
Partner: UNT Libraries Government Documents Department
open access

Hydrologic and Geochemical Controls on the Transport of Radionuclides in Natural Undisturbed Arid Environments as Determined by Accelerator Mass Spectrometry Measurements

Description: This project developed low-level analytical methods for the measurement of radionuclides by accelerator mass spectrometry. The contaminant radionuclides potentially measurable by AMS include: 14C, 36Cl, 59Ni, 63Ni, 90Sr, 93Zr, 99Tc, 129I, 239Np, 239Pu, and other actinides. We chose to concentrate on 36Cl, 99Tc, 90Sr, and 129I. These nuclides were globally distributed as fallout during the era of atmospheric nuclear testing, and occur today in almost every environment. They also are prominent co… more
Date: December 31, 1999
Creator: Nimz, Gregory J.; Caffee, Marc W. & McAninch, Jeffrey
Partner: UNT Libraries Government Documents Department
open access

Rapid Mass Spectrometric DNA Diagnostics for Assessing Microbial Community Activity During Bioremediation

Description: Changes in pollutant profiles observed in contaminated soils have been attributed to biological activity when in actuality abiotic processes caused pollutant removal.1 This sometimes casual implication of biodegradation is not acceptable, but understandable, because factors which cause the disappearance of pollutants are not always easy to identify. Several pollutant removal or transformation pathways are possible with most pollutants found in soil and these processes may or may not operate ind… more
Date: December 31, 1999
Creator: Benner, W. Henry; Hunter-Cevera, Jennie & Jaklevic, Joseph M.
Partner: UNT Libraries Government Documents Department
open access

Extraction and Recovery of Mercury and Lead from Aqueous Waste Streams using Redox-Active Layered Materials

Description: The goals of this program have been to develop a series of new compounds that act as redox recyclable heavy metal ion selective materials. This has been a preliminary exploration into the viability of creating materials that act as selective exchange media. We have historically been involved in the separation of ionic pollutants such as radionuclides or toxic heavy metal ions from water by designing extractants with high selectivities and large capacities. We have also recognized that there is … more
Date: December 31, 1999
Creator: Dorhout, P. K & Strauss, S. H.
Partner: UNT Libraries Government Documents Department
open access

Ionizing Radiation Induced Catalysis on Metal Oxide Particles

Description: This project was conducted to determine if ionizing radiation could be used to catalytically destroy organics over semiconducting metal oxide particles. We focused primarily on the destruction of organic chelating agents, such as EDTA, which are known to hamper the separation of radionucleii (such as Sr or Am) from tank waste using current ion exchange methods. Our objective was to determine if ionizing radiation could be used to destroy the chelating capability of species such as EDTA, either … more
Date: December 31, 1999
Creator: Henderson, Michael A.
Partner: UNT Libraries Government Documents Department
open access

Optimization of Thermochemical, Kinetic, and Electrochemical Factors Governing Partitioning of Radionuclides During Melt Decontamination of Radioactively Contaminated Stainless Steel

Description: Metal waste generated from domestic nuclear operations for defense and commercial applications has led to a growing stockpile of radioactively contaminated scrap metal, much of which is stainless steel. This steel contains large quantities of strategic elements such as nickel and chromium and constitutes a valuable domestic resource [1]. A significant fraction of this material cannot be efficiently surface decontaminated, and burial of this material would be wasteful and expensive, since long t… more
Date: December 31, 1999
Creator: Van den Avyle, James A.; Melgaard, David; Molecke, Martin; Shelmidine, Greg J.; Pal, Uday & Bychkov, Sergie I.
Partner: UNT Libraries Government Documents Department
open access

Characterization of a new family of metal transporters

Description: Metal ions are critical nutrients, yet overaccumulation of these same metals can also be toxic. To maintain appropriate intracellular levels, cells require specific metal uptake systems that are subject to precise homeostatic regulation. The long-range goal of our research is to define the molecular mechanism(s) and regulation of metal ion uptake in eukaryotic cells. Integrating genetic, molecular biological and biochemical approaches, we have examined these processes in the yeast Saccharomyces… more
Date: December 31, 1999
Creator: Guerinot, Mary L. & Dide, David
Partner: UNT Libraries Government Documents Department
open access

Development of a High Fluence Neutron Source for Nondestructive Characterization of Nuclear Waste

Description: We are addressing the need to measure nuclear wastes, residues, and spent fuel in order to process these for final disposition. For example, TRU wastes destined for the WIPP must satisfy extensive characterization criteria outlined in the Waste Acceptance Criteria, the Quality Assurance Program Plan, and the Performance Demonstration Plan. Similar requirements exist for spent fuel and residues. At present, no nondestructive assay (NDA) instrumentation is capable of satisfying all of the PDP tes… more
Date: December 31, 1999
Creator: Pickrell, Mark M.
Partner: UNT Libraries Government Documents Department
open access

Enhanced Sludge Processing of HLW: Hydrothermal Oxidation of Chromium, Technetium, and Complexants by Nitrate

Description: The objective of this project is to develop the scientific basis for hydrothermal separation of chromium from High Level Waste (HLW) sludges. Our worked is aimed at attaining a fundamental understanding of chromium speciation, oxidation/reduction and dissolution kinetics, reaction mechanisms, and transport properties under hydrothermal conditions in both simple and complex salt solutions that will ultimately lead to an efficient chromium leaching process.
Date: December 31, 1999
Creator: Buelow, Steven J. & Robinson, Jeanne M.
Partner: UNT Libraries Government Documents Department
open access

A Chaotic-Dynamical Conceptual Model to Describe Fluid flow and Contaminant Transport in a Fractured Vadose zone

Description: (1) To determine if and when dynamical chaos theory can be used to investigate infiltration of fluid and contaminant transport in heterogeneous soils and fractured rocks. (2) To introduce a new approach to the multiscale characterization of flow and transport in fractured basalt vadose zones and to develop physically based conceptual models on a hierarchy of scales. The following activities are indicative of the success in meeting the project s objectives: A series of ponded infiltration tests,… more
Date: December 31, 1999
Creator: Faybishenko, Boris; Doughty, Christine; Stoops, Thomas M.; Wood, thomas R. & Wheatcraft, Stephen W.
Partner: UNT Libraries Government Documents Department
open access

Interfacial Radiolysis Effects in Tank Waste Speciation

Description: The purpose of this project was to develop an understanding of radiolysis in systems relevant to nuclear wastes stored in tanks at DOE sites such as Hanford, Savannah River, and Idaho. Since these wastes are highly heterogeneous systems, determining the effects of particulate matter on the radiolytic yields was the main focus of interest. When translated to site-specific concerns, quantitative modeling of these processes can be developed once the fundamental phenomena are understood. Interpreta… more
Date: December 31, 1999
Creator: Orlando, Thom M.; Meisel, Dan & Camaioni, Donald M.
Partner: UNT Libraries Government Documents Department
open access

IN SITU INFRARED STUDY OF CATALYTIC DECOMPOSITION OF NITRIC OXIDE (NO)

Description: The growing concerns for the environment and increasingly stringent standards for NO emission have presented a major challenge to control NO emissions from electric utility plants and automobiles. Catalytic decomposition of NO is the most attractive approach for the control of NO emission for its simplicity. Successful development of an effective catalyst for NO decomposition will greatly decrease the equipment and operation cost of NO control. Due to lack of understanding of the mechanism of N… more
Date: December 31, 1999
Partner: UNT Libraries Government Documents Department
open access

TRUPACT-II Operating and Maintenance Instructions

Description: The purpose of this document is to provide the technical requirements for preparation for use, operation, inspection, and maintenance of a Transuranic Package Transporter Model II (TRUPACT-II) Shipping Package and directly related components. This document complies with the minimum requirements as specified in the TRUPACT-II Safety Analysis Report for Packaging (SARP) and Nuclear Regulatory Commission (NRC) Certificate of Compliance (C of C) 9218. In the event there is a conflict between this d… more
Date: December 31, 1999
Creator: Westinghouse Electric Corporation, Waste Isolation Division
Partner: UNT Libraries Government Documents Department
open access

Cooled silicon nitride stationary turbine vane risk reduction. Final report

Description: The purpose of this program was to reduce the technical risk factors for demonstration of air cooled silicon nitride turbine vanes. The effort involved vane prototype fabrication efforts at two U.S. based gas turbine grade silicon nitride component manufacturers. The efficacy of the cooling system was analyzed via a thermal time/temperature flow test technique previously at UTRC. By having multiple vendors work on parts fabrication, the chance of program success increased for producing these ch… more
Date: December 31, 1999
Creator: Holowczak, John
Partner: UNT Libraries Government Documents Department
open access

Rapid Mass Spectrometric DNA Diagnostics for Assessing Microbial Community Activity During Bioremediation

Description: Changes in pollutant profiles observed in contaminated soils have been attributed to biological activity when in actuality abiotic processes caused pollutant removal.1 This sometimes casual implication of biodegradation is not acceptable, but understandable, because factors which cause the disappearance of pollutants are not always easy to identify. Several pollutant removal or transformation pathways are possible with most pollutants found in soil and these processes may or may not operate ind… more
Date: December 31, 1999
Creator: Benner, W. Henry; Hunter-Cevera, Jennie; Jaklevic, Joseph M. & Torok, Tamas
Partner: UNT Libraries Government Documents Department
open access

Nuclear Magnetic Resonance Imaging of Water Content in the Subsurface

Description: This report contains the experimental, theoretical and numerical studies performed under Department of Energy (DOE) Agreement Number DE-FG07-96ER14732 entitled ''Surface Nuclear Magnetic Resonance for Imaging Subsurface Water.'' DOE and Department of Defense (DOD) complexes and test ranges are situated in widely varying climatic conditions from the desert southwest to the humid east. The mission of the Office of Environmental Restoration and Waste Management (EM) is to clean up the inventory of… more
Date: December 31, 1999
Creator: Hendrickx, Jan M.H.; Yao, T. & Kearns, Anne
Partner: UNT Libraries Government Documents Department
Back to Top of Screen