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390,690 Matching Results

Start Over Decade 1970-1979

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Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
Review of recent measurements of charmed particle lifetimes using emulsions (open access)

Review of recent measurements of charmed particle lifetimes using emulsions

This talk is a review of results which have been reported during the past year on charmed particle decays in emulsions.
Date: December 1, 1979
Creator: Voyvodic, L.
Object Type: Article
System: The UNT Digital Library
Proceedings of the symposium on experiments using enriched antiproton, polarized proton, and polarized antiproton beams at Fermilab energies (open access)

Proceedings of the symposium on experiments using enriched antiproton, polarized proton, and polarized antiproton beams at Fermilab energies

The conference included 10 papers, one of which appeared previously under conference number Conf: 770675-1. Separate abstracts were prepared for the remaining nine papers. (JFP)
Date: June 10, 1977
Creator: Yokosawa, A. (ed.)
Object Type: Article
System: The UNT Digital Library
Tellurium interference in /sup 129/I activation analysis (open access)

Tellurium interference in /sup 129/I activation analysis

Measurement of /sup 129/I at low levels is required for effluent control, environmental assessment and tracer studies in the natural environment. Low level /sup 129/I analysis has also been used for measurement of natural-fission-produced /sup 129/I in minerals and ores as well as meteorites. The most sensitive method for /sup 129/I measurements is neutron activation analysis of iodine separated from a suitable sample. Minimum sample processing prior to neutron activation is desirable in order to reduce chances of sample contamination with uranium or /sup 129/I. A potential interference in the activation analysis method is the production of /sup 129/I (/sup 130/I) from Te impurities in the irradiated ampoule. Procedures have been developed and applied to measurement of the magnitude of the potential Te interference. One-tenth of a microgram of Te in the irradiated ampoule is sufficient to produce interference in the analysis. This is detectable by either radiochemical Te measurements or by /sup 131/I detection in the iodine fraction from the irradiated ampoule. This paper discusses the procedures and results of Te interference studies in /sup 129/I activation analysis. The interference was found to be insignificant for most analyses. 5 tables.
Date: September 20, 1979
Creator: Kaye, J. H.; Brauer, F. P. & Strebin, Jr., R. S.
Object Type: Article
System: The UNT Digital Library
Hydrogen bonding in asphaltenes and coal. Progress report, March 1, 1977--August 31, 1977 (open access)

Hydrogen bonding in asphaltenes and coal. Progress report, March 1, 1977--August 31, 1977

A calorimetric method is presented for the simultaneous evaluation of equilibrium constant, K, and molar enthalpy, ..delta..H/sup 0/, for 1 : 1 adduct formation of quinoline (Qu) with asphaltene (A), together with its acid/neutral (AA) fraction and its base (BA) fraction, isolated from a centrifuged liquid product (CLP) sample prepared from Kentucky hvAb coal at 27.6 MPa hydrogen pressure and 723K, with reactor charged with glass pellets. The same procedure was used to determine K and ..delta..H/sup 0/ for 1 : 1 adduct formation of Qu with asphaltene and heavy oils obtained from CLP samples (FB-53) prepared with CoMo catalyst at different run times and process conditions. The effects of the CoMo catalyst, run time, and residence times on viscosity, molecular weight, ..delta..H/sup 0/, heteratom content, contents of preasphaltene, asphaltene and heavy oil, aromaticity, and structural parameters, are determined. These findings lead to the conclusion that hydrogen bonding plays an important role in determining viscosity, and contributes more to the enthalpy of interaction than does ..pi..-interaction. The toluene-insoluble fraction, asphaltene (whole, acid/neutral and base fractions), and heavy oil were isolated from a solvent-refined-coal (SRC) conversion product. Data obtained from several infrared and viscosity experiments indicate that the behavior of different …
Date: August 1, 1977
Creator: Li, N. C. & Tewari, K. C.
Object Type: Report
System: The UNT Digital Library
Non-linear numerical studies of the tearing mode (open access)

Non-linear numerical studies of the tearing mode

A non-linear, time dependent, hydromagnetic model is developed and applied to the tearing mode, one of a class of instabilities which can occur in a magnetically confined plasma when the constraint of infinite conductivity is relaxed. The model is based on the eight partial differential equations of resistive magnetohydrodynamics (MHD). The equations are expressed as a set of conservation laws which conserves magnetic flux, momentum, mass, and total energy. These equations are then written in general, orthogonal, curvilinear coordinates in two space dimensions, so that the model can readily be applied to a variety of geometries. No assumption about the ordering of terms is made. The resulting equations are then solved by the method of finite differences on an Eulerian mesh. The model is applied to several geometries.
Date: January 1, 1978
Creator: Schnack, D.D. Jr.
Object Type: Report
System: The UNT Digital Library
Simulation of chlorinated water discharges from power plants on estuaries and rivers (open access)

Simulation of chlorinated water discharges from power plants on estuaries and rivers

The fast-transient (tidal-transient) one-dimensional discrete-element chemical transport model and its associated computer code CHMONE were applied to study the effects of chlorinated water discharges from power plants on tidal estuaries and controlled rivers. The mathematical model has the capability to predict simultaneously the hydrodynamic, thermal, and chemical composition of water as one-dimensional time-dependent distributions. (LTW)
Date: January 1, 1977
Creator: Eraslan, A. H.; Lietzke, M. H.; Fischer, S. K. & Kalmaz, E. V.
Object Type: Article
System: The UNT Digital Library
Digital SLIFER Recorder, Model A. [Underground nuclear explosions] (open access)

Digital SLIFER Recorder, Model A. [Underground nuclear explosions]

The Digital SLIFER Recorder (DSR) is an instrument that records a time-varying frequency signal in the range from 700 kHz to 1500 kHz with an amplitude greater than 200 mV. This signal is referenced to an input fiducial marker, and recording is initiated by an increase in the frequency of the signal. The primary purpose of this instrument is to record data from the SLIFER system. The DSR records 512 samples after the record trigger signal, with a sample interval of 50 ..mu..s (for a total recording time of 25.55 ms). The measurement essentially uses a 20-cycle period-averaging counter technique.
Date: November 1, 1977
Creator: Breding, D.R.; Fogel, D.; Loukota, J.J.; Worthen, G.S. & Watterberg, J.P.
Object Type: Report
System: The UNT Digital Library
Resource, technology, and environment at the geysers (open access)

Resource, technology, and environment at the geysers

A general review, description, and history of geothermal development at the Geysers is presented. Particular emphasis is placed on environmental impacts of development of the area. The discussion is presented under the following chapter titles: introduction; energy, enthalpy and the First Law; vapor-producing geothermal reservoirs--review and models; geothermal; entropy and the Second Law; power plants--basics; H/sub 2/S emissions; hydrogen sulfide--possible health effects and odor; other emissions; power plant hydrogen sulfide abatement; hot water based geothermal development; phytotoxicity of geothermal emissions; appendices; and bibliography. (JGB)
Date: June 1, 1977
Creator: Weres, O.; Tsao, K. & Wood, B.
Object Type: Report
System: The UNT Digital Library
Computer program SCAP-BR for gamma-ray streaming through multi-legged ducts (open access)

Computer program SCAP-BR for gamma-ray streaming through multi-legged ducts

A computer program, SCAP-BR, has been developed at Burns and Roe for the gamma-ray streaming analysis through multi-legged ducts. SCAP-BR is a modified version of the single scattering code, SCAP, incorporating capabilities of handling multiple scattering and volumetric source geometries. It utilizes the point kernel integration method to calculate both the line-of-sight and scattered gamma dose rates by employing the ray tracing technique through complex shield geometries. The multiple scattering is handled by a repeated process of the single scatter method through each successive scatter region and collapsed pseudo source meshes constructed on the relative coordinate systems. The SCAP-BR results have been compared with experimental data for a Z-type (three-legged) concrete duct with a Co-60 source placed at the duct entrance point. The SCAP-BR dose rate predictions along the duct axis demonstrate an excellent agreement with the measured values.
Date: December 8, 1977
Creator: Byoun, T. Y.; Babel, P. J. & Dajani, A. T.
Object Type: Article
System: The UNT Digital Library
Acoustic measurements of the boiling stability tests on THORS sodium loop. [LMFBR] (open access)

Acoustic measurements of the boiling stability tests on THORS sodium loop. [LMFBR]

Acoustic data of boiling stability tests on the THORS (Thermal-Hydraulic Out-of-Reactor Safety) facility were obtained using three sodium-immersible high temperature microphones. The data was analyzed in both the time and frequency domains and provides the following information: (1) the acoustic signal due to sodium boiling was clearly observed; (2) the signal level and the repetition rate of boiling pulses are directly proportional to the applied heat flux; (3) a typical boiling pulse consists of a high frequency signal due mainly to the bubble collapses and a low frequency void oscillation; (4) the frequency spectra of the boiling and background pulses can be mostly assigned to various acoustic resonance frequencies of the THORS loop.
Date: January 1, 1977
Creator: Sheen, S.H.; Bobis, J.P. & Carey, W.M.
Object Type: Article
System: The UNT Digital Library
Project R. D. Bailey experimental excavation program. [Spillway] (open access)

Project R. D. Bailey experimental excavation program. [Spillway]

None
Date: June 1, 1975
Creator: Bechtell, W.R.
Object Type: Report
System: The UNT Digital Library
Field radiography using 100 Ci of Co-60 without interrupting adjacent manufacturing operations (open access)

Field radiography using 100 Ci of Co-60 without interrupting adjacent manufacturing operations

Radiography is the primary method of Nondestructive Examination recognized by the ASME B and PV Code as providing objective evidence of volumetric examination of the pressure boundary welds that are present in the Clinch River Breeder Reactor Program (CRBRP) Steam Generator. In order to support the steam generator production schedule, the radiographic examinations must be performed without interrupting any other manufacturing or inspection operations taking place within a 20-ft radius from the source. This condition imposes rigorous radiation safety requirements since the gamma radiation sources chosen to be used for examination of the pressure boundary welds, Co-60 and Ir-192, are very energetic. Co-60 gamma ray energy is 1.17 and 1.33 MeV and Ir-192 gamma ray is .6 MeV. The hazard of using such a high energy sources in the immediate vicinity of working personnel has necessitated the need for a thorough evaluation of methods of protection. Personnel protection from penetrating radiation, both x-ray and gamma ray, is accomplished by ingenious use, singly or in combination, of two factors which reduce radiation intensity. These factors are distance and shielding. In all radiographic operations the primary consideration is for personnel safety. The maximum radiation dose rate limit will be 0.002 rem/hr. This …
Date: January 1, 1979
Creator: Donnelly, C.W.
Object Type: Article
System: The UNT Digital Library
Industrial Fuel Gas Demonstration-Plant Program. Pretreatment unit options (Deliverable No. 41) (open access)

Industrial Fuel Gas Demonstration-Plant Program. Pretreatment unit options (Deliverable No. 41)

Three approaches to pretreatment for the Industrial Fuel Gas Demonstration Plant project in the Institute of Gas Technology (IGT) Pilot Plant have been examined. Analyses of these approaches, selection of the best alternative among the three, and detailed design and evaluation of cost and schedule impacts were made. The best approach available to pretreatment demonstration is an integrated pretreater - an ash agglomerating gasifier (AAG) that uses the existing AAG system, a new pretreater pressure vessel, and needed ancillary equipment. Based on pilot plant results, IGT dos not recommend pretreatment for the Industrial Fuel Gas Demonstration Plant or testing pretreatment in the IGT Pilot Plant, but merely suggests the above approach to pilot plant testing of pretreatment as the most viable. Based on pilot plant tests, IGT does not feel that pretreatment is necessary for operation of the ash agglomerating gasifier with Western Kentucky No. 9 coal. IGT has developed a feeding technique that enables raw coal to be fed directly to the gasifier without plugging of the feed nozzle lines which has been demonstrated in several tests. Should pretreatment prove necessary because of unforeseen circumstances, IGT has studied the available alternatives and has selected the best alternative for detailed …
Date: December 1, 1978
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Staff rosters for 1979: environmental programs (open access)

Staff rosters for 1979: environmental programs

The roster of the scientific and professional staffs of the Environmental Programs of the Department of Energy and Environment has been compiled as of December 1979. Staff members have been listed according to their organizational units, i.e., the Atmospheric Sciences Division, the Environmental Chemistry Division, the Oceanographic Sciences Division, and the Land and Freshwater Environmental Sciences Group. Educational background, research interests, professional activities, summary of experience at BNL, and selected publications have been included for each member listed.
Date: December 1, 1979
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Environmental monitoring at major U. S. Energy Research and Development Administration contractor sites: calendar year 1976. Volume 2 (open access)

Environmental monitoring at major U. S. Energy Research and Development Administration contractor sites: calendar year 1976. Volume 2

The purpose of this compilation is to present, in a central reference document, all of the individual annual reports summarizing the results of the environmental monitoring programs conducted at each of the Energy Research and Development Administration (ERDA) sites having a potential for environmental impact or which release a significant quantity of radioactivity or nonradioactive pollutants. Data on the levels of radioactivity and nonradioactive pollutants in effluents and the environs at each site are given, and effluent and environmental measurements and sampling results are evaluated in relation to the appropriate standards for environmental protection, including estimates of potential radiation exposures offsite. It is noteworthy that, in most cases, the potential offsite exposures are so low they cannot be determined by direct measurement methods but must be estimated by calculational techniques. All potential offsite exposures to members of the public from routine effluent releases in 1976 were less than 5 mrem/yr (i.e., less than one percent of the established radiation protection guidelines for exposure of the public). Additionally, the estimated collective man-rem dose potential to all members of the public within an 80 Km radius at all ERDA sites is less than .02 percent of the estimated man-rem dose due to …
Date: August 1, 1977
Creator: unknown
Object Type: Report
System: The UNT Digital Library
ORMAK upgrade ohmic coil generator protection (open access)

ORMAK upgrade ohmic coil generator protection

This report describes methods which can be used to limit the voltage across the generator for normal operation and various ground faults. It also contains quantitative information, obtained from the computer study, which can be used for evaluating the protection methods cost-wise.
Date: January 1, 1978
Creator: Campen, G. L.; Easter, R. B. & Nickels, L. E.
Object Type: Report
System: The UNT Digital Library
Energy and protein production from pulp mill wastes. Progress report, June 15, 1977--September 15, 1977 (open access)

Energy and protein production from pulp mill wastes. Progress report, June 15, 1977--September 15, 1977

Experiments conducted during this past quarter demonstrated the decided difference both in amount and composition of the gas produced from the fermentation of ozonated versus unozonated yeast-plant SSL. Gas from ozonated SSL averaged over 80% methane content while unozonated effluent was mostly carbon dioxide. Gas production rates and retention time studies indicated that the fermentation was substrate-limited. Preliminary tests using supplemental carbon sources have verified this. The success of the ozonation process in producing fermentable substrates was clearly shown by the appreciable yeast growth in the ozonated SSL. Of particular significance was the maximum yield obtained at the short ozonation time of 10 minutes as compared to the 2-hour treatment. It is possible that shortening the ozonation time could also increase the amount of substrate available for methane production. This would be very important in transferring this process to a commercial basis and reducing the operating costs.
Date: September 15, 1977
Creator: Jurgensen, M. F. & Patton, J. T.
Object Type: Report
System: The UNT Digital Library
Coal Technology Program. Progress report for November 1977 (open access)

Coal Technology Program. Progress report for November 1977

A block of Pittsburgh seam bituminous coal and a block of Wyodak subbituminous coal were pyrolyzed under reducing gas in support of in situ gasification. Information from previously completed block pyrolysis of bituminous coal under an argon atmosphere show that differences in evolved gas result from differences in heating rates. Compared to block pyrolysis at 0.3 C/sup 0//min, block pyrolysis at 3 C/sup 0//min produces less gas but gas with a higher heating value, yielding a higher overall pyrolysis gas efficiency in recovering coal heating value. Experimental work on the fracture toughness and tensile properties of steels that may be used for piping and pressure vessels in very large gasification systems continued. The toughness of quenched 2/sup 1///sub 4/ Cr-1 Mo steel simulating the surface of a 254 to 305 mm-thick plate was measured, and the differences in toughness and tensile properties following two temperature treatments were determined. Post-weld heat treatment effects were also characterized. All properties remained within the range for ASME SA 387, Grade 22, Class 2 material. Work on inspection techniques for ceramic and cermet coatings is being closed out by completing and updating reports in various draft stages. Work is underway to establish a program for …
Date: January 1, 1978
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Hot-ion distribution function in ORMAK, the Oak Ridge Tokamak (open access)

Hot-ion distribution function in ORMAK, the Oak Ridge Tokamak

A distortion of the Maxwellian ion-energy distribution function in tokamak-produced plasmas may be revealed in the spectral-line radiation. We report experimental evidence that (1) a change in the value of Z/sub eff/, (2) delayed gas injection, (3) neutral beam injection, and (4) liner cleaning procedures can alter the profile of the Balmer-..cap alpha.. (6563 A) line of hydrogen. The distortion is analyzed in terms of an effective toroidal-drift velocity, ion-temperature relation.
Date: March 1, 1978
Creator: Neidigh, R.V. & Sigmar, D.J.
Object Type: Report
System: The UNT Digital Library
Technique for dynamic range reduction for Landsat ratio images (open access)

Technique for dynamic range reduction for Landsat ratio images

The LANDSAT ratio image, obtained by dividing one MSS band by another on a point-by-point basis, has become an established tool for geological applications over the past several years. Display of such images can be difficult since the dynamic range can extend from zero to infinity. A scheme for dynamic range reduction, based on a mathematical model of the multispectral image, is presented. It can be implemented on stand-alone digital image processing systems as well as general purpose computers. This technique also has potential application in machine classification of geological data. Digital image processing examples are presented in which this new scheme is compared with other commonly used techniques for dynamic range reduction.
Date: January 1, 1978
Creator: Wecksung, G.W. & Breedlove, J.R. Jr.
Object Type: Article
System: The UNT Digital Library
Total hadron cross section, new particles, and muon electron events in e/sup +/e/sup -/ annihilation at SPEAR (open access)

Total hadron cross section, new particles, and muon electron events in e/sup +/e/sup -/ annihilation at SPEAR

The review of total hadron electroproduction cross sections, the new states, and the muon--electron events includes large amount of information on hadron structure, nine states with width ranging from 10's of keV to many MeV, the principal decay modes and quantum numbers of some of the states, and limits on charm particle production. 13 references. (JFP)
Date: January 1, 1976
Creator: Richter, B.
Object Type: Article
System: The UNT Digital Library
Calorimetric and optical beam diagnostics on the LBL 120-keV neutral beam test facility (open access)

Calorimetric and optical beam diagnostics on the LBL 120-keV neutral beam test facility

The 120-keV Neutral Beam Test Facility at LBL is fitted with several types of instrumentation to determine the properties of the 10- to 15-A hydrogen and deuterium beams produced in this facility. These include a neutral particle dump for measuring the temperature profile generated by the beam, and a fixed and a moveable ion dump to measure the temperature profiles generated by the various ion components after they have been swept out of the neutral beam by a bending magnet. These several dumps provide enough information to determine the power density profiles and divergences of the neutral beam and the various ion beams for comparison with theoretical calculations, the beam composition, and the neutralization efficiency. The optical beam diagnostic consists of a high-resolution spectrometer coupled with a commercial optical multichannel analyzer. These instruments analyze Doppler-shifted optical radiation from the moving neutral atoms in the beam. Analysis of data so obtained provides the aiming directions and divergences of the various energy components in the neutral beam, as well as the beam composition.
Date: October 1, 1977
Creator: Burrell, C. F.; Cooper, W. S.; Steele, W. F. & Smith, R. R.
Object Type: Article
System: The UNT Digital Library
Estimates of the number of large amplitude gusts (open access)

Estimates of the number of large amplitude gusts

Preliminary estimates are presented of the number of occurrences of large amplitude gusts for use in the design of wind energy conversion systems. Existing turbulence information has been combined with an assumed wind speed distribution to arrive at the estimates. The number of large amplitude gusts per year is treated as a function of the annual mean wind speed and terrain roughness. This treatment is based upon the assumptions that the atmosphere has neutral stability during high winds and that the gustiness is induced by flow over surface roughness elements. Large gusts during thunderstorms and other severe weather phenomena are not treated. The results of the study are presented in tabular form as a function of gust amplitude and hourly average wind speed.
Date: March 1, 1978
Creator: Ramsdell, J.V.
Object Type: Report
System: The UNT Digital Library
LLL total flow geothermal program: summary of two-phase nozzle tests for scale control and materials performance (open access)

LLL total flow geothermal program: summary of two-phase nozzle tests for scale control and materials performance

A series of nozzle and wearblade tests to evaluate scale control and materials performance under total flow nozzle inlet conditions and simulated turbine blade environments was completed using Magmamax No. 1 well fluid. Brine acidification was effective in preventing scale in nozzles and on wearblade flow surfaces. Acid consumption measurements indicate that acid cost will be less than 2 mills/100 lb. brine. Measured erosion rates were low and the results indicate that available materials will allow successful turbine operation for many years. Stress corrosion cracking was not observed in specimens of the leading candidate turbine material (Ti-6A1-4V) after up to 60-hours operation at stresses similar to those expected in an operating turbine system.
Date: December 1, 1977
Creator: Tardiff, G.E. (ed.)
Object Type: Report
System: The UNT Digital Library