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The effects of halides on the performance of coal gas-fueled molten carbonate fuel cells: Final report, October 1986-October 1987

Description: This report presents the results of a program to determine the probable tolerable limits of hydrogen chloride and hydrogen fluoride present in the fuel and oxidant streams of molten carbonate fuel cells that are operating on gasified coal. A literature survey and thermodynamic analyses were performed to determine the likely effects of halides on cell performance and materials. Based on the results of these studies, accelerated corrosion experiments and electrode half-cell performance tests were… more
Date: October 1, 1987
Creator: Magee, T. P.; Kunz, H. R.; Krasij, M. & Cote, H. A.
Partner: UNT Libraries Government Documents Department
open access

Combustion of ultrafine coal/water mixtures and their application in gas turbines: Final report

Description: The feasibility of using coal-water fuels (CWF) in gas turbine combustors has been demonstrated in recent pilot plant experiments. The demands of burning coal-water fuels with high flame stability, complete combustion, low NO/sub x/ emission and a resulting fly ash particle size that will not erode turbine blades represent a significant challenge to combustion scientists and engineers. The satisfactory solution of these problems requires that the variation of the structure of CWF flames, i.e., … more
Date: October 1, 1987
Creator: Toqan, M.A.; Srinivasachar, S.; Staudt, J.; Varela, F. & Beer, J.M.
Partner: UNT Libraries Government Documents Department
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Enhanced durability and reactivity for zinc ferrite desulfurization sorbent

Description: AMAX Research Development Center (AMAX R D) has been investigating methods for improving the reactivity and durability of the zinc ferrite desulfurization sorbent. Zinc ferrite sorbents are intended for use in desulfurization of hog coal gas in integrated gasification combined cycle (IGCC) or molten carbonate fuel cell (MCFC) applications. The reactivity of the sorbent may be defined as its sulfur sorption capacity at the breakthrough point in a bench-scale fixed-bed reactor. The durability may… more
Date: October 27, 1987
Creator: Jha, M. C. & Berggren, M. H.
Partner: UNT Libraries Government Documents Department
open access

Solubility and superconductivity in RE(Ba sub 2-x RE sub x )Cu sub 3 O sub 7+. delta. (RE = Nd, Sm, Eu, Gd, Dy)

Description: Solid solutions of RE(Ba{sub 2-x}RE{sub x})Cu{sub 3}O{sub 7- {delta}}(RE=Nd,Sm,Eu,Gd,Dy) for x=0 to x=0.5 have been investigated. X-ray and resistivity measurements show that there exists a solid solution region, through which, the structure changes from orthorhombic to tetragonal and the superconducting properties are depressed. The solubility limits depend strongly on the size of the rare-earth ion, with the smallest (Dy) showing no appreciable solubility. The superconducting transition tempe… more
Date: October 1, 1987
Creator: Zhang, K.; Dabrowski, B.; Segre, C.U.; Hinks, D.G.; Schuller, I.K.; Jorgensen, J.D. et al.
Partner: UNT Libraries Government Documents Department
open access

A Review and Analysis of Fortran 8x

Description: The ANSI Standards Subcommittee X3J3 on Fortran has recently completed a draft proposed standard for the Fortran programming language. The draft proposed standard, known informally as Fortran 8x, is a revision of the current standard X3.9-1978, known informally as Fortran 77. This report is a review of Fortran 8x and consists of a series of six articles. The first article gives a general overview of Fortran 8x. The next three articles give brief discussions of the array facilities; the enhanced… more
Date: October 1987
Creator: Smith, Brian T.
Partner: UNT Libraries Government Documents Department
open access

Application of a Multigrid Method to a Buoyancy-Induced Flow Problem

Description: The numerical prediction of buoyancy-induced flows provides special difficulties for standard numerical techniques associated with velocity-buoyancy coupling. We present a multigrid algorithm based upon a novel relaxation scheme that handles this coupling correctly. Numerical experiments have been performed that show that this approach is reasonably efficient and robust for a range of Rayleigh numbers and a variety of cycling strategies.
Date: October 1987
Creator: Thompson, C. P.; Leaf, G. K. & Vanka, S. P.
Partner: UNT Libraries Government Documents Department
open access

A search for supersymmetric electrons with the Mark II detector at PEP (Positron Electron Project)

Description: An experimental search for selectrons, the supersymmetric partner of the electron, has been performed at the PEP storage ring at SLAC using the Mark II detector. The experimental search done was based upon hypothetical reaction in e/sup +/e/sup -/ interactions at PEP center of mass energies of 29 GeV. In this reaction the selectrons, e-tilde, are assumed produced by the interaction of one of initial state electrons with a photon radiated from the other initial state electron. This latter electr… more
Date: October 1, 1987
Creator: LeClaire, B.W.
Partner: UNT Libraries Government Documents Department
open access

Estimation of aerial deposition and foliar uptake of xenobiotics: Assessment of current models

Description: This report reviews existing mathematical and/or computer simulation models that estimate xenobiotic deposition to and transport through (both curricular and stomatal) vegetative surfaces. The report evaluates the potential for coupling the best of those models to the existing Uptake, Translocation, Accumulation, and Biodegradation model to be used for future xenobiotic exposure assessments. Here xenobiotic compounds are defined as airborne contaminants, both organic and gaseous pollutants, tha… more
Date: October 1, 1987
Creator: Link, S. O.; Fellows, R. J.; Cataldo, D. A.; Droppo, J. G. & Van Voris, P.
Partner: UNT Libraries Government Documents Department
open access

Quality site seasonal report, Tucson Job Corps Center, SFBP (Solar in Federal Buildings Program) 1751, November 1984 through July 1985

Description: The active solar Domestic Hot Water (DHW) system at the Tucson Job Corps Center was designed and constructed as part of the Solar in Federal Buildings Program (SFBP). This retrofitted system is one of eight of the systems in the SFBP selected for quality monitoring. The purpose of this monitoring effort is to document the performance of quality state-of-the-art solar systems in large Federal buildings. The systems are unique prototypes. Design errors and system faults discovered during the moni… more
Date: October 15, 1987
Creator: Logee, T.L.
Partner: UNT Libraries Government Documents Department
open access

Design of the D0 overpass dispersion correction

Description: The existing D0 overpass induces a vertical dispersion wave around the Main ring with dispersion amplitudes of around 1.6 to 1.8 m. There are two major reasons to eliminate or reduce vertical dispersion induced by the D0 overpass: to lower the beam momentum dependence on vertical positions which had not existed before the overpass; and to raise the Tevatron luminosity by eliminating the dispersion mismatch between the main Ring and Tevatron. 20 figs., 1 tab.
Date: October 7, 1987
Creator: Trbojevic, D.
Partner: UNT Libraries Government Documents Department
open access

Fermi surface and effective masses for the heavy-electron superconductor UPt sub 3

Description: Local-density-approximation (LDA) calculations for the Fermi-surface extremal cross-sectional areas of UPt{sub 3} are presented and compared to deHaas-van Alphen experiments of Taillefer et al. The topology of the calculated surfaces is in excellent agreement with experiment and allows a determination of the directional dependence of the anisotropic mass-renormalization factor. The source of this renormalization is briefly discussed. 12 refs., 4 figs., 2 tabs.
Date: October 1, 1987
Creator: Norman, M. R.; Albers, R. C.; Boring, A. M.; Christensen, N. E. (Argonne National Lab., IL (USA); Los Alamos National Lab., NM (USA) & Max-Planck-Institut fuer Festkoerperforschung, Stuttgart (Germany, F.R.))
Partner: UNT Libraries Government Documents Department
open access

Procedures manual for the Evaluated Nuclear Structure Data File

Description: This manual is a collection of various notes, memoranda and instructions on procedures for the evaluation of data in the Evaluated Nuclear Structure Data File (ENSDF). They were distributed at different times over the past few years to the evaluators of nuclear structure data and some of them were not readily avaialble. Hence, they have been collected in this manual for ease of reference by the evaluators of the international Nuclear Structure and Decay Data (NSDD) network contribute mass-chain… more
Date: October 1, 1987
Creator: Bhat, M.R. (ed.)
Partner: UNT Libraries Government Documents Department
open access

Determination of alpha/sub s/ from energy-energy correlations in e/sup +/e/sup -/ annihilation at 29 GeV

Description: We have studied the energy-energy correlation in e/sup +/e/sup -/ annihilation into hadrons at ..sqrt..s = 29 GeV using the Mark II detector at PEP. We find to O(..cap alpha../sub s//sup 2/) that ..cap alpha../sub s/ = 0.158 +- .003 +- .008 if hadronization is described by string fragmentation. Independent fragmentation schemes give ..cap alpha../sub s/ = .10 - .14, and give poor agreement with the data. A leading-log shower fragmentation model is found to describe the data well.
Date: October 1, 1987
Creator: Wood, D. R.
Partner: UNT Libraries Government Documents Department
open access

A neutral-beam diagnostic for fast confined alpha particles in a burning plasma: Application on CIT (Compact Ignition Tokamak)

Description: Diagnostic methods for fast confined alpha particles are essential for a burning-plasma experiment. We review one- and two-electron-capture methods using energetic neutral beams, and provide quantitative estimates of signal level for a two-electron-capture method applicable to CIT. The best probe is a ground-state helium-atom beam because of its relatively good penetration into a CIT plasma and the large cross section for two-electron capture; it can be produced in useful quantities from HeH/su… more
Date: October 1, 1987
Creator: Schlachter, A. S.; Stearns, J. W. & Cooper, W. S.
Partner: UNT Libraries Government Documents Department
open access

Quality site seasonal report, Eisenhower Museum, SFBP (Solar in Federal Buildings Program) 4008, March 1985 through September 1985

Description: The active solar Domestic Hot Water (DHW) and space heating system at the Eisenhower Museum was designed and constructed as part of the Solar in Federal Buildings Program (SFBP). This retrofitted system is one of eight of the systems in the SFBP slected for quality monitoring. The purpose of this monitoring effort is to document the performance of quality state-of-the-art solar systems in large federal building applications. These systems are unique prototypes. Design errors and system faults d… more
Date: October 15, 1987
Creator: Raymond, M.G.
Partner: UNT Libraries Government Documents Department
open access

Reactivity and isotopic composition of spent PWR (pressurized-water-reactor) fuel as a function of initial enrichment, burnup, and cooling time

Description: This study presents the reactivity loss of spent PWR fuel due to burnup in terms of the infinite lattice multiplications factor, k/sub infinity/. Calculations were performed using the SAS2 and CSAS1 control modules of the SCALE system. The k/sub infinity/ values calculated for all combinations of six enrichments, seven burnups, and five cooling times. The results are presented as a primary function of enrichment in both tabular and graphic form. An equation has been developed to estimate the ta… more
Date: October 1, 1987
Creator: Cerne, S.P.; Hermann, O.W. & Westfall, R.M.
Partner: UNT Libraries Government Documents Department
open access

Quality site seasonal report, Fort Devens Launderette, SFBP (Solar in Federal Buildings Program) 1751, December 1984 through June 1985

Description: The active solar Domestic Hot Water (DHW) system at the Fort Devens Launderette was designed and constructed as part of the Solar in Federal Buildings Program (SFBP). This retrofitted system was one of eight systems selected for quality monitoring. The purpose of this monitoring effort was to document the performance of quality state-of-the-art solar systems in large federal buildings. The launderette is part of the Post Exchange complex at the Fort Devens Army Post in Fort Devens, Massachusett… more
Date: October 15, 1987
Creator: Logee, T.L.
Partner: UNT Libraries Government Documents Department
open access

Design and construction of a Vertex Chamber and measurement of the average B-Hadron lifetime

Description: Four parameters describe the mixing of the three quark generations in the Standard Model of the weak charged current interaction. These four parameters are experimental inputs to the model. A measurement of the mean lifetime of hadrons containing b-quarks, or B-Hadrons, constrains the magnitudes of two of these parameters. Measurement of the B-Hadron lifetime requires a device that can measure the locations of the stable particles that result from B-Hadron decay. This device must function relia… more
Date: October 1, 1987
Creator: Nelson, H.N.
Partner: UNT Libraries Government Documents Department
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Level II Cultural Resource investigation for the Texoma Distribution Enhancements project, Cameron and Calcasieu Parishes, Louisiana: Final report

Description: A Level II Cultural Resource Survey was completed for the Texoma Distribution Enhancements project, located in Cameron and Calcasieu Parishes, Louisiana. The 13-mile pipeline extends from Strategic Petroleum Reserve No. 3 to a terminus near Vincent Landing. Located in Louisiana's southwest coastal zone, the pipeline will traverse extensive marsh lands as well as upland prairie terrace areas. Present land use within the project area consists primarily of undeveloped marsh land and cattle ra… more
Date: October 1, 1987
Creator: LeeDecker, C. H. & Holland, C. C.
Partner: UNT Libraries Government Documents Department
open access

Algorithms and procedures in the model based control of accelerators

Description: The overall design of a Model Based Control system was presented. The system consists of PLUG-IN MODULES, governed by a SUPERVISORY PROGRAM and communicating via SHARED DATA FILES. Models can be ladded or replaced without affecting the oveall system. There can be more then one module (algorithm) to perform the same task. The user can choose the most appropriate algorithm or can compare the results using different algorithms. Calculations, algorithms, file read and write, etc. which are used in … more
Date: October 1, 1987
Creator: Bozoki, E.
Partner: UNT Libraries Government Documents Department
open access

ATHENA radiation model

Description: The ATHENA computer program has many features that make it desirable to use as a space reactor evaluation tool. One of the missing features was a surface-to-surface thermal radiation model. A model was developed that allows any of the regular ATHENA heat slabs to radiate to any other heat slab. The view factors and surface emissivities must be specified by the user. To verify that the model was properly accounting for radiant energy transfer, two different types of test calculations were perfor… more
Date: October 1, 1987
Creator: Shumway, R.W.
Partner: UNT Libraries Government Documents Department
open access

Automated saturated standard cell intercomparison

Description: A cost effective, highly efficient, and automatic method of intercomparing standard cells has been sought after and implemented, utilizing computer control and a commercially available scanner. This system reduces intercomparison time from 4 hours to 30 minutes using the standard National Bureau of Standard (NBS) 4 x 4 design. 7 figs., 1 tab.
Date: October 5, 1987
Creator: Bell, B. E. & Deitesfeld, C. A.
Partner: UNT Libraries Government Documents Department
open access

Characterization of aerodynamic drag force on single particles: Final report

Description: An electrodynamic balance was used to measure the drag coefficient and also to record the size and shape of spheres, and coal and oil shale particles (100 ..mu..m to 200 ..mu..m in size). The electrodynamic balance consisted of a central, and two end electrodes. The resulting electric field stably suspended a charged particle. A suspended particle, back illuminated by a light emitting diode, was viewed by a video camera. The image was analyzed for particle position control and was calibrated to… more
Date: October 1, 1987
Creator: Kale, S.R.
Partner: UNT Libraries Government Documents Department
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