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4,390 Matching Results
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Minimally refined biomass fuel. [carbohydrate-water-alcohol mixture]
A minimally refined fluid composition, suitable as a fuel mixture and derived from biomass material, is comprised of one or more water-soluble carbohydrates such as sucrose, one or more alcohols having less than four carbons, and water. The carbohydrate provides the fuel source; water-solubilizes the carbohydrate; and the alcohol aids in the combustion of the carbohydrate and reduces the viscosity of the carbohydrate/water solution. Because less energy is required to obtain the carbohydrate from the raw biomass than alcohol, an overall energy savings is realized compared to fuels employing alcohol as the primary fuel.
Date:
March 26, 1981
Creator:
Pearson, R. K. & Hirschfeld, T. B.
Object Type:
Patent
System:
The UNT Digital Library
Control of gas input and background pressure in the end plug regions of the TMX-U thermal barrier experiment
Rate equations for the plasma species in a thermal barrier end plug establish an upper bound on the neutral pressure (P) external to the plasma. For the Tandem Mirror Experiment-Upgrade (TMX-U), this bound is P less than or equal to 0.5 - 1.0 x 10/sup -6/ Torr. Initially TMX-U did not satisfy this criterion, and axial end plugging of plasma losses seemed limited by the excessive pressure. Subsequently, we modified the machine to improve the vacuum conditions, decreasing P to the desired range. At the same time axial end plugging of plasma losses increased to the duration of neutral beam injection and ECRH heating. Here we summarize our experimental measurements of gas input.
Date:
October 26, 1983
Creator:
Turner, W. C.; Nexsen, W. E.; Allen, S. L.; Hooper, E. B.; Hunt, A. L.; Lang, D. D. et al.
Object Type:
Article
System:
The UNT Digital Library
The Brookhaven Accelerator Test Facility laser linac beam line
We report here the low emittance beam transport line for laser acceleration experiments at the Brookhaven Accelerator Test Facility (ATF). In order to preserve the low emittance ({approximately} 10{sup -10} m-rad) 50 MeV electron beam, great care has to be paid to the higher-order effects. The low-emittance transport line consists of two parts; the first part performs and emittance selection, and the other part provides the possibility of energy selection and beam transport to the experimental area. 7 refs., 5 figs., 7 tabs.
Date:
September 26, 1989
Creator:
Wang, Xijie (Brookhaven National Lab., Upton, NY (USA) California Univ., Los Angeles, CA (USA). Center for Advanced Accelerators Physics) & Kirk, H.G. (Brookhaven National Lab., Upton, NY (USA))
Object Type:
Report
System:
The UNT Digital Library
Rate Dependent Inelastic Behavior of Polycrystalline Solids Using a Dislocation Model
A rate dependent theory of polycrystalline plasticity is presented in which the solid is modeled as an isotropic continuum with internal variables. The rate of plastic deformation is shown to be a function of the deviatoric portion of the Cauchy stress tensor as well as two scalar internal variables. The scalar internal variables, which are the dislocation density and mobile fraction, are governed by rate equations which reflect the evolution of microstructural processes. The model has been incorporated into a two dimensional finite element code and several example multidimensional problems are presented which exhibit the rate dependence of the material model.
Date:
February 26, 1980
Creator:
Werne, R. W. & Kelly, J. M.
Object Type:
Article
System:
The UNT Digital Library
Cementation process for minerals recovery from Salton Sea geothermal brines
The potential for minerals recovery from a 1000-MWe combined geothermal power and minerals recovery plant in the Salton Sea is examined. While the possible value of minerals recovered would substantially exceed the revenue from power production, information is insufficient to carry out a detailed economic analysis. The recovery of precious metals - silver, gold, and platinum - is the most important factor in determining the economics of a minerals recovery plant; however, the precious metals content of the brines is not certain. Such a power plant could recover 14 to 31% of the US demand for manganese and substantial amounts of zinc and lead. Previous work on minerals extraction from Salton Sea brines is also reviewed and a new process, based on a fluidized-bed cementation reaction with metallic iron, is proposed. This process would recover the precious metals, lead, and tin present in the brines.
Date:
January 26, 1982
Creator:
Maimoni, A.
Object Type:
Report
System:
The UNT Digital Library
Positron-annihilation studies of molybdenum irradiated by protons, neutrons, or electrons
Annealed molybdenum was irradiated at room temperature by energetic protons or neutrons and the fluence and recoil energy dependence of two traps was measured. Comparison of trapping rates with calculations of damage energy correlates high energy recoils with the short lifetime trap and low energy recoils with the longer lifetime.
Date:
March 26, 1982
Creator:
Howell, R.H.
Object Type:
Article
System:
The UNT Digital Library
Technical evaluation report on the monitoring of electric power to the reactor-protection system for the Brunswick Steam Electric Plant, Units 1 and 2
This report documents the technical evaluation of the monitoring of electric power to the reactor protection system (RPS) at the Brunswick Steam Electric Plant, Units 1 and 2. The evaluation is to determine if the proposed design modification will protect the RPS from abnormal voltage and frequency conditions which could be supplied from the power supplies and will meet certain requirements set forth by the Nuclear Regulatory Commission. The proposed design modifications with time delays verified by GE, will protect the RPS from sustained abnormal voltage and frequency conditions from the supplying sources.
Date:
April 26, 1982
Creator:
Selan, J.C.
Object Type:
Report
System:
The UNT Digital Library
Executive committee report: geotechnical instrumentation working group meeting
Responding to the widespread need for the geotechnical community to discuss instrumentation for nuclear waste repositories, a meeting was held December 2 and 3, 1981, in Denver, Colorado. This report gives the group's consensus recommendations to aid in making decisions for development of instrumentation for future repository work. The main conclusions of the working group meeting were as follows: (1) monitoring of geotechnical parameters in nuclear waste repositories will be necessary to meet licensing requirements; (2) currently available instruments are underdeveloped for this monitoring; (3) research and development to provide adequate instrumentation will need to be performed under federal sponsorship by national laboratories, universities, contractors, and consultants; and (4) a NASA-type reliability program is needed to meet the quality assurance, durability, calibration, and time schedule demands of geotechnical instrumentation development. This will require significant financial commitments from the federal sector.
Date:
April 26, 1982
Creator:
Wilder, D. G.; Rogue, F.; Beloff, W. R.; Binnall, E. & Gregory, E. C.
Object Type:
Article
System:
The UNT Digital Library
Proceedings of the workshop on the impact of hydrogen on water reactor safety. Volume II of IV
Separate abstracts were prepared for the papers presented in the subject area: hydrogen sources and detection.
Date:
January 26, 1981
Creator:
Berman, M. (ed.)
Object Type:
Article
System:
The UNT Digital Library
The response of a Fermilab-designed ion chamber in pulsed photon fields
This note reports measurements of the response of a Fermilab-designed area monitor ionization chamber used in Chipmunk and Scarecrow detectors to pulsed photon fields of various intensities and durations. The measurements were made to better define the operating limits of the instruments and to understand the possible effects of recombination and space charge on the dose measured by the instruments in pulsed fields. 2 refs., 13 figs., 1 tab.
Date:
January 26, 1988
Creator:
Freeman, W.S.; Hartman, B.; Krueger, F. & Larson, J.
Object Type:
Report
System:
The UNT Digital Library
Equations of state for self-excited MHD generator studies
We have constructed a state-of-the-art equation of state (EOS) for argon covering the temperature density range attainable by currently proposed self-excited MHD generators. The EOS for conditions in the flow channel was obtained primarily by a non-ideal plasma code (ACTEX) that is based on a many body activity expansion. For conditions in the driver chamber the EOS was primarily obtained from a fluid code (HDFP) that calculates the fluid properties from perturbation theory based on the insulator interatomic pair potential but including electronic excitations. The results are in agreement with several sets of experimental data in the 0.6 - 91 GPa pressure range.
Date:
February 26, 1980
Creator:
Rogers, F. J.; Ross, M.; Haggin, G. L. & Wong, L. K.
Object Type:
Report
System:
The UNT Digital Library
Dating shallow groundwater using sup 3 H- sup 3 He and sup 85 Kr
Determining the age of groundwater from monitoring wells can greatly aid in understanding a hydrologic system. Groundwater dating techniques have been used to estimate residence times ranging from about 1000 to 50,000 years. While such measurements have been very useful in hydrothermal and geochemical studies and in the development of groundwater supplies, they have been of limited use in contaminant studies associated with shallow groundwater systems since residence times are often much less than 1000 years.
Date:
August 26, 1988
Creator:
Solomon, D.K.
Object Type:
Report
System:
The UNT Digital Library
Liquid to gas leak ratios with liquid nitrogen and liquid helium
To predict the leak rates of liquid helium and liquid nitrogen containers at operating conditions we need to know how small leaks (10/sup -8/ to 10/sup -5/ atm-cm/sup 3/ air/s), measured at standard conditions, behave when flooded with these cryogens. Two small leaks were measured at ambient conditions (approx.750 Torr and 295 K), at the normal boiling points of LN/sub 2/ and LHe, and at elevated pressures above the liquids. The ratios of the leak rates of the liquids at ambient pressure to the gases (G) at ambient pressure and room temperature were: GN/sub 2/(1), LN/sub 2/(18), GHe(1), and LHe(172). The leak rate ratio of LN/sub 2/ at elevated pressure was linear with pressure. The leak rate ratio of LHe at elevated pressure was also linear with pressure.
Date:
February 26, 1985
Creator:
Batzer, T. H. & Call, W. R.
Object Type:
Article
System:
The UNT Digital Library
Mechanism of catalytic gasification of coal char. Quarterly technical report No. 5, October 1 to December 31, 1981
The purpose of this study is to determine the mechanisms involved in the catalytic reactions of coal char and to identify the specific reaction steps and the parameters that control the catalytic process. The mode of action of the catalyst can be viewed in two ways. In one view, the catalyst participates in a reduction/oxidation cycle. The initial reaction between the carbon and the catalyst reduces the KOH to potassium accompanied by the gaseous reactant (H/sub 2/O or CO/sub 2/), producing further gaseous products (CO and H/sub 2/) and regenerating the initial state of the catalyst. In an alternative view, the catalyst initially forms an alkali metal addition compound with the carbon network of the char. The carbon-carbon bonds are altered by the formation of the metal-carbon linkage, possibly by electron transfer from the alkali metal atom to the carbon structure. As a result, the carbon structure is more readily attacked by the gaseous reactant (CO or H/sub 2/O) to produce the products of gasification. The following areas were investigated to provide experimental evidence for these catalytic modes of action: chemical kinetic measurements; thermodynamic measurements; free radicals in reacting carbon; electrical conductivity measurements. A detailed discussion on the catalyst-carbon interaction …
Date:
February 26, 1982
Creator:
Wood, B. J.; Sancier, K. M.; Sheridan, D. R.; Chan, B. L. & Wise, H.
Object Type:
Report
System:
The UNT Digital Library
Nuclear performance optimization of the Be/Li/Th blanket for the fusion breeder
More rigorous nuclear analysis, including treatment of resonance self-shielding effects coupled with an optimization procedure, has resulted in improved performance of the Be/Li/Th blanket. Net U-233 breeding ratio has increased 36% (to 0.84) while at an average U-233/Th ratio of 0.5 a/o average energy multiplication has increased only 12% (to 2.1) compared with earlier results.
Date:
February 26, 1985
Creator:
Lee, J. D. & Bandini, B. R.
Object Type:
Article
System:
The UNT Digital Library
Investigation into the feasibility of wind as an alternate energy resource at selected North Georgia sites
Anemometers were placed at four selected sites in North Georgia during the period July, 1980, to June, 1982. Regular wind speed readings were taken using accumulating recorders and average daily wind speeds calculated for each location. Three wind speed categories were determined: (a) average below 7 mph; (b) average between 7 and 25 mph; (c) average above 25 mph. One site was abandoned after seven months due to lack of expected wind; another site was closed after 4.5 months due to continuing excessive and damaging winds. Two sites were determined, after 12 to 20 months of data collecting respectively, to have sufficient wind resources in a usable time pattern to merit further investigation.
Date:
October 26, 1982
Creator:
Brock, D.L.
Object Type:
Report
System:
The UNT Digital Library
Procedure for matching synfuel users with potential suppliers. Final report
A procedure has been developed for matching prospective users and producers of synthetic fuels. The matching procedure, which involves a hierarchical screening process, is designed to assist OFC in: locating a supplier for a firm that wishes to obtain synthetic fuel exemption (Fuel Use Act); determining whether the fuel supplier proposed by a petitioner is technically and economically capable of meeting the petitioner's needs; and assisting the Synthetic Fuels Corporation in evaluating potential markets for synthetic fuels. Application of the screening procedure resulted in the identification of one or more candidates for supplying synthetic fuel to each of the prospective users. In this report the development of the screening procedure is described. Chapter 1 contains a detailed description of the seven screens; Chapter 2 describes the development of the hierarchical procedure for applying the screens to each synthetic fuels project; Chapter 3 describes the modification of the screening procedure for low and medium Btu gas; Chapter 4 describes the application of the procedure. Appendix A is a list of references used in developing the procedure; Appendix B is a detailed listing of proposed and ongoing synthetic fuel projects.
Date:
September 26, 1981
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Opportunistic replacement of fusion power system parts
This paper describes a maintenance problem in a fusion power plant. The problem is to specify which life limited parts should be replaced when there is an opportunity. The objective is to minimize the cost rate of replacement parts and of maintenance actions while satisfying a power plant availability constraint. The maintenance policy is to look ahead and replace all parts that will reach their life limits within a time called a screen. Longer screens yield greater system availabilities because more parts are replaced prior to their life limits.
Date:
October 26, 1981
Creator:
Day, J.A. & George, L.L.
Object Type:
Article
System:
The UNT Digital Library
[News Clip: Whiners]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, covering footage of a reporter asking people about what they're whining about inside a mall. This story aired at 10pm.
Date:
December 26, 1989, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Knife Maker]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, covering a news story by reporter Jack Helsel about Weatherford artisan Jack Crain who makes custom knives used in movies and television including "Commando" and "Predator." This story includes footage from those films as well as Crain at work in his converted barn. This story aired at 6:00 P.M.
Date:
October 26, 1988
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: DART toys]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, covering a news story about DART bus stops that accepted toys for donation for the holidays. This story aired at 5pm.
Date:
November 26, 1989, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Actuelle]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, covering a news story by reporter Jeff Eliasoph about dinner at a family shelter where a restaurant served nice food. This story aired at 10 pm.
Date:
November 26, 1989
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: X-mas trees]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, covering footage of Christmas trees being grouped together for the holiday season. This story aired at 6pm.
Date:
December 26, 1989, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Soviet kids]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, of Soviet children with facial deformities being transported for surgery to a Dallas hospital. This story aired at 5pm.
Date:
November 26, 1989, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library