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State of the art of pressurized fluidized bed combustion systems

Description: This report was prepared at the request of the Tennessee Valley Authority (TVA) to clarify the development status of the pressurized fluidized bed combustor (PFBC) and to place in perspective the problems which are yet to be solved before commercialization of the concept is practical. This report, in essence, supersedes the interim report published in 1979, Assessment of the State of the Art of Pressurized Fluidized Bed Combustion Systems. A brief overview of the PFBC concept is included citing… more
Date: September 1, 1980
Creator: Graves, R.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High-Sensitivity Single-Molecule Fluorescence Detection in Theory and Practice

Description: The number of emitted photons that can be obtained from a fluorophore increases with the incident light intensity and the duration of illumination. However, saturation of the absorption transition and photodestruction place natural limits on the ultimate signal-to-noise ratio that can be obtained. Equations have been derived to describe the fluorescence-to-background-noise ratio in the presence of saturating light intensities and photodestruction. The fluorescence lifetime and the photodestruct… more
Date: 1989
Creator: Mathies, R. A.; Peck, K. & Stryer, L.
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Partner: UNT Libraries Government Documents Department
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Estimates of SASE power in the short wavelength region

Description: Given a sufficiently bright electron beam, the self-amplified-spontaneous emission (SASE) can provide gigawatts of short wavelength coherent radiation. The advantages of SASE approach are that is requires neither optical cavity nor an imput seed laser. In this note, we estimate the peak power performance of SASE for wavelengths shorter than 1000 {Angstrom}. At each wavelength, we calculate the saturated power from a uniform parameter undulator and the enhanced power from a tapered undulator. Th… more
Date: March 1, 1992
Creator: Kim, Kwang-Je.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dependence of secondary ion emission from organic material on the energy loss of the impacting heavy ion

Description: Samples of the amino acid valine were irradiated by 2.5 MeV-Ar, 0.8 MeV-Kr and 1.0 MeV Xe beams from the Argonne Dynamitron accelerator in order to study the energy distributions of ejected secondary ions. For Kr and Xe the nuclear stopping power exceeded the electronic stopping power by a factor 2 or 3, respectively, but the functional shape of the energy distributions and the mean ejection energies (0.9--1.4 eV) indicated that the molecular ions (M{plus minus}H){sup {plus minus}} are desorbed… more
Date: January 1, 1991
Creator: Hunt, J.E. (Argonne National Lab., IL (United States)) & Wien, K. (Technische Hochschule Darmstadt (Germany). Inst. fuer Kernphysik)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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(Pulsed atmospheric fluidized bed combustion (PAFBC)). [Comparing PAFBC vs. AFBC]

Description: The fourth Quarterly Technical Progress Report presents the results of work accomplished during the period February 6 through April 30, 1989. the overall objective of the program is the development of a pulsed atmospheric, fluidized bed combustion (PAFBC) technology to burn coal and to provide heat and steam to commercial, institutional, and small industrial applications at a reasonable price in an environmentally acceptable manner. During this past quarter, a baseline for comparing PAFBC vs. A… more
Date: May 1, 1989
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Conversion rates in power plant plumes based on filter pack data. Part I. Coal-fired Cumberland plume

Description: The TVA Cumberland Steam Plant plume was monitored during the August 1978 Tennessee Plume Study of Project STATE. Samples were obtained by employing a triple screen high-volume assembly which contained: (1) a quartz filter for collecting particulate SO/sub 4//sup 2 -/, NO/sub 3//sup -/ and NH/sub 4//sup +/, (2) two NaCl-impregnated cellulose filters for collecting gaseous nitrate, and (3) two K/sub 2/CO/sub 3/-impregnated cellulose filters for collecting SO/sub 2/. Formation rates of sulfate an… more
Date: January 1, 1980
Creator: Forrest, J; Garber, R W & Newman, L
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Distortion of He emission lines after fast-ion collisions

Description: After excitation by fast ions (velocity = 2 to 5 au) the emission line profiles of doubly-excited helium atoms are observed to differ significantly from the normal shape of Beutler-Fano resonances. This difference is attributed to the Coulomb interaction between the emitted electron and the ion used to excite the atom. We explain the effect quantitatively with a simple classical model combined with a post-collision-interaction theory. 4 refs., 4 figs.
Date: January 1, 1985
Creator: Arcuni, P. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Review of proposed EPA ambient lead criteria standard document. Final report. Task assignment No. 10

Description: The proposed October 1983 EPA ambient lead criteria document, Air Quality Criteria for Lead is reviewed from the perspective of DOE's policies and programs and addresses potential impacts on energy production and energy-intensive industries. Following an introduction, the study is organized in five subsequent sections. Section 2.0 addresses environmental and health effects of exposure to lead. Section 3.0 reviews sources of lead emissions. Section 4.0 presents information on lead concentrations… more
Date: March 4, 1984
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design of neutron streak camera for fusion diagnostics

Description: The D-T burn time for advanced laser-fusion targets is calculated to be very short, < 50 ps. We describe the design of a neutron streak camera of 16 ps resolving time that can be used to study the temporal history of fusion burn. The cathode of the neutron streak camera is sensitive to neutrons and is curved such that the difference in the neutron path lengths from a point source to various parts of the cathode is compensated by electron transit times within the streak tube. Thus the cathode ca… more
Date: June 1, 1982
Creator: Wang, C. L.; Kalibjian, R. & Singh, M. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Influences of clouds and rain on the large-scale transport and deposition of sulfur

Description: This paper describes the application of a three-dimensional, global-scale Eulerian model with an explicit description of cloud and chemical processes. Simulation results describing the transport of sulfur from North America and Europe across the north Atlantic Ocean during a climatological July are presented. Wet deposition was found to contribute slightly more to total sulfur deposition than dry deposition, a feature explained by the large amounts of precipitation during this month. The wet de… more
Date: July 1, 1991
Creator: Luecken, D.J.; Berkowitz, C.M. & Easter, R.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Photoemission from solids: the transition from solid-state to atomic physics

Description: As the photon energy is increased, photoemission from solids undergoes a slow transition from solid-state to atomic behavior. However, throughout the energy range h..nu.. = 10 to 1000 eV or higher both types of phenomena are present. Thus angle-resolved photoemission can only be understood quantitatively if each experimenter recognizes the presence of band-structure, photoelectron diffraction, and photoelectron asymmetry effects. The quest for this understanding will build some interesting brid… more
Date: August 1, 1980
Creator: Shirley, D.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High accuracy electron-impact photoemission cross section measurements for the EUV radiometric standard

Description: This project was concerned with high-accuracy measurements of electron-impact photoemission cross sections for transitions of atoms and molecules in the EUV spectral region (30 nm to 200 nm). The spectrometer-detector system that was employed in the measurements was calibrated using well-parameterized synchrotron radiation. The 58.4 resonance line of He was chosen to establish the overall accuracy of the apparatus and data collection procedures. The measurement of this line can be compared to a… more
Date: January 1, 1989
Creator: Risley, J. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Addition of bromine as a diagnostic gas to inertial confinement fusion target microspheres

Description: Currently, direct fuel rho r measurements on Inertial Confinement Fusion (ICF) targets by neutron activation of the argon tracer gas mixed with the DT fuel would require a 100 fold increase in neutron yield. Bromine, on the other hand, has excellent properties for neutron activation analysis at neutron yields of 10two' to 10/sup 8/, when present at an internal pressure of from 0.1 to 0.2 atmospheres. Bromine addition is accomplished in a 2 furnace system using the dried-gel method of microspher… more
Date: August 22, 1980
Creator: Morrison, R. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Comments on photoelectron spectroscopy of high- Tc 's

Description: The photoemission discussion session during the Argonne conference on Fermiology of High-{Tc}'s provided a forum to air a number of unresolved issues in photoelectron spectroscopy. These are: (a) what is the exact energy dependence of the line width of the quasiparticle peaks: (b) are there any chemical potential shifts with hole doping; (c) why is a superconducting gap not observed in Y-123; and (d) different groups report different results in the band structure of Bi-2212. The first issue, wh… more
Date: January 1, 1991
Creator: Arko, A. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Spectral weight changes at the superconducting transition of Bi sub 2 Sr sub 2 CaCu sub 2 O sub 8+. delta

Description: An overview of our gap studies in high-{Tc} superconductors is presented for the workshop on Fermiology of high-{Tc}'s. The work is centered on the study of single crystal Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}. In a conventional BCS superconductor, a superconducting gap {Delta} is formed when the near Fermi edge electrons condense to form Cooper pairs at low temperatures. As the material goes superconducting the density of states is modified such that the spectral intensity in the regio… more
Date: January 1, 1991
Creator: Dessau, D. S.; Shen, Z. X.; Wells, B. O.; Spicer, W. E. (Stanford Univ., CA (United States). Stanford Electronics Labs.) & Arko, A. J. (Los Alamos National Lab., NM (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A review of the Y-12 Plant discharge of enriched uranium to the sanitary sewer (DEUSS)

Description: The Oak Ridge Y-12 Plant is situated adjacent to the Oak Ridge city limits and is operated by the United States Department of Energy (DOE). The Y-12 Plant is located on 4,860 acres, which is collectively referred to as the Y-12 Plant site. Among the missions for which the facility is in existence are producing nuclear weapons components, supporting weapon design laboratories, and processing special nuclear materials (SNM). The Y-12 Plant is under the regulatory guidance of DOE Order 5400.5 and … more
Date: September 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electron beam and high-speed optical diagnostics for the Los Alamos HIBAF (High Brightness Accelerator FEL) Facility

Description: Characterization of the electron beam's properties will be a major task after the upgrade of the Los Alamos Free-Electron Laser (FEL) Facility with a photoelectric injector (PEI) and increased acceleration capability to 40 MeV. Adjustments to the previous diagnostics package that address the lower beam emittance, higher energy, and wakefield source reduction issues will be discussed. 6 refs., 8 figs., 1 tab.
Date: January 1, 1989
Creator: Lumpkin, A. H.; Cornelius, W. D.; Stein, W. E.; Feldman, R. B.; Meier, K. L. & Young, L. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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1990 Environmental Monitoring Report, Sandia National Laboratories, Albuquerque, New Mexico

Description: This 1990 report contains monitoring data from routine radiological and nonradiological environmental surveillance activities. Summaries of significant environmental compliance programs in progress such as National Environmental Policy Act (NEPA) documentation, environmental permits, environmental restoration, and various waste management programs for Sandia National Laboratories in Albuquerque (SNL, Albuquerque) are included. The maximum offsite dose impact was calculated to be 2.0 {times} 10{… more
Date: May 1, 1991
Creator: Hwang, S.; Yeager, G.; Wolff, T.; Parsons, A.; Dionne, D.; Massey, C. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Temperature dependence of the fraction of re-emitted positrons, the positron work function, and the positronium fraction for Cu(III)+S

Description: A beam of 1 keV positrons incident on a Cu(111)+S surface has been used to study the dependence on temperature of the positron work function (phi/sub +/), the yield of re-emitted positrons (Y) and of the positronium (Ps) fraction. A positive dependence of the slow-positron yield on temperature is found which is attributed in part to a reduction in the magnitude of phi/sub +/ (approx. 25%) at 50 K relative to its value at 300 K. A similar, though weaker, positive dependence on temperature was se… more
Date: January 1, 1982
Creator: Schultz, P.J. & Lynn, K.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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1990 Environmental monitoring report, Tonopah Test Range, Tonopah, Nevada

Description: There is no routine radioactive emission from Sandia National Laboratories, Tonopah Test Range (SNL, TTR). However, based on the types of test activities such as air drops, gun firings, ground- launched rockets, air-launched rockets, and other explosive tests, possibilities exist that small amounts of depleted uranium (DU) (as part of weapon components) may be released to the air or to the ground because of unusual circumstances (failures) during testing. Four major monitoring programs were use… more
Date: May 1, 1991
Creator: Hwang, A.; Phelan, J.; Wolff, T.; Yeager, G.; Dionne, D.; West, G. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Low-background measurements of neutron emission from Ti metal in pressurized deuterium gas

Description: A wide variety of neutron detector systems have been used at various research facilities to search for anomalous neutron emission from deuterated metals. Some of these detector systems are summarized here together with possible sources of spurious signals from electronic noise. During the past two years, we have performed experiments to measure neutron emission from pressurized D{sub 2} gas mixed with various forms of titanium metal chips and sponge. Details concerning the neutron detectors, ex… more
Date: January 1, 1991
Creator: Menlove, H. O.; Paciotti, M. A.; Claytor, T. N. & Tuggle, D. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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