UNT Libraries Government Documents Department - 33 Matching Results

Search Results

Results: 1 - 24 next
open access

Air filtration enhancement using electronic techniques

Description: Dielectrophoretic filtration experiments were conducted on glass, polyester, dacron, Teflon, wool, acrylic and polypropylene filter media. A polydispersed (sigma g = 2.0, ammd = 0.95 ..mu.. m) sodium chloride particle was used as a test aerosol. All materials exhibited significant increases in efficiency with increasing field strengths. Efficiencies of greater than 99 percent could be obtained from glass fiber mats using a 13 kV/cm electric field at 16.3 cm/s face velocity.
Date: June 24, 1976
Creator: Nelson, G. O.; Richards, C. P.; Biermann, A. H.; Taylor, R. D. & Miller, H. H.
Item Type: Refine your search to only Article
open access

BLAST: a digital computer program for the dynamic simulation of the high temperature gas cooled reactor reheater-steam generator module

Description: BLAST simulates the high temperature gas cooled reactor reheater-steam generator module with a multi-node, fixed boundary, homogenous flow model. The time dependent conservation of energy, mass, and momentum equations are solved by an implicit integration technique. The code contains equation of state formulations for both helium and water as well as heat transfer and friction factor correlations. Normal operational transients and more severe transients such as those resulting in low and/or rev… more
Date: June 24, 1976
Creator: Hedrick, R. A. & Cleveland, J. C.
Item Type: Refine your search to only Report
open access

E Division activities report, FY 1976

Description: Some of the activities in E (Experimental Physics) Division are described. E Division carries out basic and applied research in atomic and nuclear physics as well as in material and biomedical sciences, centered around the Laboratory's four major accelerators. Experiments are grouped under the headings of neutron, photon, and charged-particle interactions. Investigations in this past year involved fission cross sections, nuclear reactions with neutrons, charged particles and gamma rays, in… more
Date: September 24, 1976
Creator: Barschall, H. H.
Item Type: Refine your search to only Report
open access

Effects of density gradient modification on fluid instability in thermonuclear micro-implosions

Description: The presence of hydrodynamic fluid instability at the ablation surface puts constraints on the kinds of targets, surface finish, and energy sources that one can use for thermonuclear micro-implosions. If Taylor-like modes grow at near the classical value, one is limited to low aspect ratio shells and surface finishes of 10-100 A. These surface finish requirements can be reduced by 1 to 2 orders of magnitude by exploiting density gradient modification techniques to obtain a shallow density gradi… more
Date: September 24, 1976
Creator: Lindl, J. D.; Bangerter, R. O.; Nuckolls, J. H.; Mead, W. C. & Thomson, J. J.
Item Type: Refine your search to only Article
open access

End stoppering in mirror machines

Description: Like toroidal confinement, confinement by a potential barrier offers the possibility of unlimited Q if the barrier is good enough. For a barrier height PHI, approximately tau approximately equal to tau/sub collision/ exp PHI/T/sub i/. These notes review previous ideas about how to establish a potential barrier at the ends of a mirror machine and we also discuss a different possibility using mirror confinement itself to establish a barrier utilizing the positive ambipolar potential characteristi… more
Date: August 24, 1976
Creator: Fowler, T. K.
Item Type: Refine your search to only Report
open access

Field-reversed mirror as a D-T power reactor

Description: The Field-Reversed-Mirror is a plasma confinement scheme which uses the diamagnetic current of the D-T fuel plasma to convert the open field pattern of a conventional mirror machine into a closed-field pattern with plasma confinement properties which are expected to be considerably improved. If realized, this improvement in confinement will considerably improve the energy gain of the mirror reactor, and result in a reduction in the cost of producing energy. The Field Reversed Mirror device is d… more
Date: September 24, 1976
Creator: Condit, W. C.; Carlson, G. A.; Devoto, R. S.; Doggett, J. & Neef, W.
Item Type: Refine your search to only Report
open access

Hanford long-term high-level waste management program

Description: An overview of the Hanford Long-Term High-Level Waste Management Program is presented. Four topics are discussed: first, the kinds and quantities of waste that will exist and are included in this program; second, how the plan is structured to solve this problem; third, the alternative waste management methods being considered; and fourth, the technology program that is in progress to carry out this plan. (LK)
Date: June 24, 1976
Creator: Wodrich, D. D.
Item Type: Refine your search to only Article
open access

Hanford site environment. [Demography, meteorology, geology, hydrology, seismology]

Description: A synopsis is given of the detailed characterization of the existing environment at Hanford. The following aspects are covered: demography, land use, meteorology, geology, hydrology, and seismology. It is concluded that Hanford is one of the most extensively characterized nuclear sites. 16 figures. (DLC)
Date: June 24, 1976
Creator: Isaacson, R. E.
Item Type: Refine your search to only Article
open access

Heat Exchanger-Ingot Casting/Slicing Process. Silicon sheet growth development for the large area silicon sheet task of the Low Cost Silicon Solar Array Project. Fourth quarterly progress report, June 19, 1976--September 24, 1976

Description: Good seeding and growth were achieved during the past quarter with the Heat Exchanger Method at melt superheats below 10/sup 0/C. To achieve a high enough seeding temperature at low superheat, the heat exchanger was raised one inch higher in the heat zone. For this higher position, seeding conditions had to be re-established since the temperature profile across the diameter of the heat zone was flatter; i.e., the temperature in the middle of the heat zone was closer to the temperature near the … more
Date: September 24, 1976
Creator: Schmid, F. & Reynolds, B.
Item Type: Refine your search to only Report
open access

Heavy-section steel technology program. Quarterly progress report for January--March 1976

Description: The program comprises studies related to the technology of materials fabricated into thick-section primary-coolant containment systems of light-water-cooled nuclear power reactors. The principal area of investigation is the behavior and structural integrity of steel pressure vessels containing cracklike flaws. Current work is organized into the following tasks: fracture mechanics analyses and investigations, effect of high-temperature primary reactor water on the subcritical crack growth of rea… more
Date: June 24, 1976
Creator: Whitman, G. D.
Item Type: Refine your search to only Report
open access

HTGR Fuels and Core Development Program. Quarterly progress report for the period ending August 31, 1976. [Graphite and fuel irradiation; fission product release]

Description: The work reported includes studies of reactions between core materials and coolant impurities, basic fission product transport mechanisms, core graphite development and testing, the development and testing of recyclable fuel systems, and physics and fuel management studies. Materials studies include irradiation capsule tests of both fuel and graphite. Experimental procedures and results are discussed and, where appropriate, the data are presented in tables, graphs, and photographs.
Date: September 24, 1976
Item Type: Refine your search to only Report
open access

Instrumentation for measuring soft x-rays from laser produced plasmas

Description: Instrumentation has been developed at the Lawrence Livermore Laboratory for measuring subkilovolt x-rays from laser-produced plasmas. This information is needed to do a complete energy balance on laser fusion experiments. The instruments must have thin windows and yet discriminate against the severe environment of other intense target emissions such as ions, electrons, and scattered laser light. Low energy x-ray measurements down to 0.1 keV will be presented using these absolutely calibrated de… more
Date: September 24, 1976
Creator: Slivinsky, V. W.; Ahlstrom, H. G.; Kornblum, H. N.; Koppel, L. N. & Leipelt, G. R.
Item Type: Refine your search to only Article
open access

Laboratory investigation of an advanced geothermal primary heat exchanger (APEX). Final report 2146:08, 30 June 1975 to 31 August 1976

Description: The research program conducted to investigate the feasibility of using a recirculating bed material, fluidized by geothermal brine, to reduce or eliminate fouling in an Advanced Geothermal Primary Heat Exchanger (APEX) is described. The research effort combined theoretical analyses and laboratory experimentation to evaluate and characterize the concept. Technical feasibility was established by testing the effectiveness of the bed material in preventing the fouling of a heat exchanger tube in wh… more
Date: September 24, 1976
Item Type: Refine your search to only Report
open access

Measurement of the K/sup -/p. -->. anti K/sup 0/n total cross section below 1 GeV/c. [500-1050 MeV/c]

Description: The total cross section for the reaction K/sup -/p ..-->.. anti K/sup 0/n was measured between 500 and 1050 MeV/c in steps of 10 MeV/c. The experiment was performed at the Brookhaven AGS using a negative kaon beam focused onto a 41 cm long liquid hydrogen target. The target was surrounded by a box of scintillation counters which detected and vetoed all charged final states. The charged particle veto box was in turn surrounded by a box of lead-scintillator sandwich shower counters. These counter… more
Date: September 24, 1976
Creator: Pollard, D. L.
Item Type: Refine your search to only Report
open access

NH/sub 3/ preconcentrator/integrator instruction manual. [Measured 10 parts per billion of ammonia in room air]

Description: Microwave rotational spectrometry is a very selective analytical technique for polar gaseous compounds. For some selected molecules (e.g., HN/sub 3/, H/sub 2/CO, SO/sub 2/, etc.) concentrations as low as 100 ppB can be detected by continuously flowing the analyzed gas mixture through the absorption cell. However, some form of preconcentration of the desired species is required for detection limits below 100 ppB. Initial work with various trap materials for ammonia suggests using chromatographic… more
Date: June 24, 1976
Creator: Hrubesh, L.; Barton, V. & Morris, C.
Item Type: Refine your search to only Report
open access

Particle and x-ray energy measurements in laser-plasma interaction experiments

Description: The energy carried by particles and low energy x-rays resulting from irradiation of targets with .5 to 1 TW, 1.06 ..mu..m lasers has been measured. The energy distributions were obtained from measurements at discrete locations using calorimeters and work is in progress to obtain them over a hemisphere with a thermal imaging system. Azimuthal symmetry and polar distributions for different focusing schemes have been determined. The data have been integrated to obtain the absorbed energy and these… more
Date: September 24, 1976
Creator: Rupert, V. C.; Gunn, S. R.; Holzrichter, J. F.; Glaros, S. S.; Severyn, J. R. & Lee, P.
Item Type: Refine your search to only Article
open access

Performance test of a bladeless turbine for geothermal applications

Description: The Possell bladeless turbine was tested at the LLL Geothermal Test Facility to evaluate its potential for application in the total flow process. Test description and performance data are given for 3000, 3500, 4000, and 4500 rpm. The maximum engine efficiency observed was less than 7 percent. It is concluded that the Possell turbine is not a viable candidate machine for the conversion of geothermal fluids by the total flow process. (LBS)
Date: March 24, 1976
Creator: Steidel, R. & Weiss, H.
Item Type: Refine your search to only Report
open access

Preliminary results of experimental work in the radionuclide migration program. The sorption character of tuffaceous rocks in a ''static'' versus ''dynamic'' mode of testing

Description: A preliminary set of experiments was conducted in order to determine the sorptive characteristics of rock with respect to ionic species under conditions of dynamic flow of an aqueous solution through a rock core. The results of the dynamic experiments have been compared to the results of static or batch experiments which were conducted under corresponding physical and chemical conditions. It was found that, gram for gram, sorption of the ion of interest was always greater in the dynamic experim… more
Date: February 24, 1976
Creator: Tewhey, J. D.
Item Type: Refine your search to only Report
Back to Top of Screen