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2,684 Matching Results
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Polymer concrete patching materials
The increased use of deicing salts is causing rapid deterioration of portland cement concrete bridge decks. Soluble chlorides cause corrosion of the steel reinforcing rods with a corresponding increase in volume of the rods. This expansion causes stresses in the concrete which result in delaminations and surface spalling. The repair of surface spalls with portland cement concrete can only be made if traffic can be avoided for several days. A patching material which would allow traffic to resume over the repaired area in a few hours was needed. Polymer concrete (PC) was developed to repair deteriorated portland cement concrete. Polymer concrete is defined as a composite material in which the aggregate is bound together in a dense matrix with a polymer binder. The aggregate is mixed with a monomer mixture and subsequently cured in place. Polymer concrete combines the premix characteristics of portland cement concrete with high strength, long term durability properties and fast cure times. PC placed at temperatures between 35/sup 0/F and 95/sup 0/F attains strengths greater than 5000 psi in 2 hours. The high early strength of PC is suitable for use in the repair of highway structures where traffic conditions allow closing of the area for …
Date:
September 1, 1977
Creator:
Fontana, J.J.
Object Type:
Article
System:
The UNT Digital Library
Physics Division annual progress report for period ending June 30, 1977. [ORNL]
The bulk of the Division's effort concerned nuclear physics and accelerator development, but work in the areas of nuclear data, research applicable to the magnetic fusion project, atomic and molecular physics, and high-energy physics is also recounted. Lists of publications, technical talks, personnel, etc., are included. Individual reports with sufficient data are abstracted separately. (RWR)
Date:
September 1, 1977
Creator:
Stelson, P.H.
Object Type:
Report
System:
The UNT Digital Library
Engineering design solutions of flux swing with structural requirements for ohmic heating solenoids
Here a more detailed publication is summarized which presents analytical methods with solutions that describe the structural behavior of ohmic heating solenoids to achieve a better understanding of the relationships between the functional variables that can provide the basis for recommended design improvements. The solutions relate the requirements imposed by structural integrity to the need for producing sufficient flux swing to initiate a plasma current in the tokamak fusion machine. A method is provided to perform a detailed structural analysis of every conducting turn in the radial build of the solenoid, and computer programmed listings for the closed form solutions are made available as part of the reference document. Distinction is made in deriving separate models for the regions of the solenoid where turn-to-turn radial contact is maintained with radial compression or with a bond in the presence of radial tension, and also where there is turn-to-turn radial separation due to the absence or the loss of bonding in the presence of would be radial tension. The derivations follow the theory of elasticity for a body possessing cylindrical anisotropy where the material properties are different in the radial and tangential directions. The formulations are made practical by presenting the methods …
Date:
September 30, 1977
Creator:
Smith, R. A.
Object Type:
Article
System:
The UNT Digital Library
HTGR fuel recycle program. Quarterly progress report for the period ending August 31, 1977
The work reported includes the development of unit processes and equipment for reprocessing of High-Temperature Gas-Cooled Reactor (HTGR) fuel, the design and development of an integrated pilot line to demonstrate the head end of HTGR reprocessing using unirradiated fuel materials, and design work in support of Hot Engineering Tests (HET). Work is also described on trade-off studies concerning the required design of facilities and equipment for the large-scale recycle of HTGR fuels in order to guide the development activities for HTGR fuel recycle.
Date:
September 1, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Trace elements in the terrestrial environment of a coal-fired powerhouse
A coal-fired powerhouse at the Savannah River Plant, Aiken, South Carolina operated for more than 20 years without electrostatic precipitators and consumed about 360,000,000 kilograms of coal per year. Twenty-nine trace elements were measured in fly ash, and in samples of soil, vegetation, and ground water collected along a 29-km traverse centered on the powerhouse. There were statistically significant effects of the stack releases upon the concentration of Ba, Be, Cu, Hg, Mn, Se, and Sr in soil; Be, Co, Mo, Sr, and V in vegetation; and Co and Mn in ground water. The Ba, Hg, Sr, and Mn in fly ash are less available to plants than the same elements in soil.
Date:
September 1, 1977
Creator:
Horton, J. H.; Dorsett, R. S. & Cooper, R. E.
Object Type:
Report
System:
The UNT Digital Library
St. Louis demonstration final report: refuse processing plant equipment, facilities, and environmental evaluations
The results are presented of processing plant evaluations of the St. Louis-Union Electric Refuse Fuel Project, including equipment and facilities as well as assessment of environmental emissions at both the processing and the power plants. Data on plant material flows and operating parameters, plant operating costs, characteristics of plant material flows, and emissions from various processing operations were obtained during a testing program encompassing 53 calendar weeks. Refuse derived fuel (RDF) is the major product (80.6% by weight) of the refuse processing plant, the other being ferrous metal scrap, a marketable by-product. Average operating costs for the entire evaluation period were $8.26/Mg ($7.49/ton). The average overall processing rate for the period was 168 Mg/8-h day (185.5 tons/8-h day) at 31.0 Mg/h (34.2 tons/h). Future plants using an air classification system of the type used at the St. Louis demonstration plant will need an emissions control device for particulates from the large de-entrainment cyclone. Also in the air exhaust from the cyclone were total counts of bacteria and viruses several times higher than those of suburban ambient air. No water effluent or noise exposure problems were encountered, although landfill leachate mixed with ground water could result in contamination, given low dilution …
Date:
September 1, 1977
Creator:
Fiscus, D. E.; Gorman, P. G.; Schrag, M. P. & Shannon, L. J.
Object Type:
Report
System:
The UNT Digital Library
Pilot demonstration-enhanced oil recovery by micellar-polymer waterflooding Bell Creek Field. Monthly technical progress report, August 1977
This is the fourteenth Monthly Technical Progress Report submitted under ERDA Contract No. EY-77-C-02-4207, formerly Contract No. E(49-18)-2237. As such it continues the coverage of the activities undertaken by Gary Operating Company, as well as by the major subcontractors, Atlantic Richfield, Union Oil and Intercomp. The work described covers the tasks for: Micellar-Polymer Systems Selection and Evaluation, Site Development, Pilot Performance Predictions and Fluid Distribution Facilities. The major activity at this time is Phase II, Task 1, the Micellar-Polymer Systems Selection as between the two competing designs being developed by Atlantic Richfield and Union Oil. This activity came to closure with Decision Point 2 on August 24, 1977.
Date:
September 10, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Thermal design and analysis of superconductors for the toroidal field coils of TNS. [NbTi]
The toroidal field coils in two of the four TNS field coil design options are superconducting. NbTi superconductors are used in the low field design option and Nb/sub 3/Sn superconductors are used in the high field design option. The preliminary conceptual design parameters of the coils and the superconductors have been developed. The selected coil shape is the pure tension D-configuration. The superconductors are the multifilamentary, cabled design and are cooled by forced flow supercritical helium. Thermal stability analyses were performed for the superconductors. The cryogenic recovery capability of the NbTi superconductors is more than 10/sup 5/ J/m/sup 3/ of conductor plus helium volume and that of the Nb/sub 3/Sn is more than 3 x 10/sup 5/ j/m/sup 3/.
Date:
September 30, 1977
Creator:
Lee, A. Y.
Object Type:
Article
System:
The UNT Digital Library
Heavy ion scattering in 3D TDHF. [Isodensity contours]
Results of three-dimensional (3D) time-dependent Hartree--Fock (TDHF) calculations are presented. The assumptions used in the calculations are summarized. The first reaction considered is /sup 16/O + /sup 16/O at 105 MeV (lab); isodensity contours integrated perpendicular to the reaction plane are shown for several impact parameters as a function of time. Trajectories are also shown, and the kinetics of the reaction is discussed; several other energies were also examined. Most of the deeply inelastic scattering seems to come from small impact parameters. Density contours and trajectories are next shown for /sup 40/Ca + /sup 40/Ca at 278 MeV (lab). Finally, density contours are shown for asymmetric systems: /sup 4/He + /sup 16/O at l = 5 h-bar and 50 MeV (lab) and /sup 16/O + /sup 40/Ca at l = 20, 40, 60, 80 h-bar and 315 MeV (lab). The light fragment seems to maintain the same average number of nucleons with which it started. 25 figures. (RWR)
Date:
September 1, 1977
Creator:
Weiss, M.S.
Object Type:
Article
System:
The UNT Digital Library
Standard interface files and procedures for reactor physics codes. Version IV
Standards, procedures, and recommendations of the Committee on Computer Code Coordination for promoting the exchange of reactor physics codes are updated to Version IV status. Standards and procedures covering general programming, program structure, standard interface files, and file management and handling subroutines are included.
Date:
September 1, 1977
Creator:
O'Dell, R. D.
Object Type:
Report
System:
The UNT Digital Library
ERDA/NASA advanced thermionic technology program. Progress report No. 27
Research progress is briefly outlined in the areas of activation experiments, enhanced mode conversion experiments, converter development (tungsten emitter, lanthanum hexaborate collector), and hot shell development. (WHK)
Date:
September 1, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Residential energy use to the year 2000: conservation and economics
This report evaluates the energy and direct economic effects of implementing various residential energy conservation programs. These evaluations are conducted using a detailed engineering-economic model that simulates residential energy use on an annual basis for 1970 through 2000. These programs include several authorized by the 94th Congress and expanded upon by the present administration: appliance-efficiency standards, thermal standards for construction of new residences and weatherization of existing housing units. In addition to these Federal programs that are being (or will be) implemented in some form, we consider two additional measures to save energy: large fuel-price increases and elimination of all market imperfections associated with production and purchase of new equipment and homes. Altogether, nine different residential energy ''futures'' are considered. The highest projection, which assumes constant real fuel prices from 1976-2000, shows residential energy use growing from 16 QBtu in 1976 to 28 QBtu in 2000, with an average annual growth rate of 2.3 percent. The baseline, which assumes rising fuel prices, yields an energy use estimate of 24 QBtu in 2000. Implementing all the Federal programs listed above would cut energy use in 2000 by 11 percent, to 22 QBtu. Adopting these programs also reduces energy-related costs to households …
Date:
September 1, 1977
Creator:
Hirst, E. & Carney, J.
Object Type:
Report
System:
The UNT Digital Library
Effect of strain-gage surface preparation techniques on beryllium
Beryllium is a metal sensitive to machining damage, causing a loss in mechanical properties. Since some mechanical abrading is often used in surface preparation for mounting strain gages, it is desirable to know whether the abrading produces flaws. Metallographic study of beryllium subjected to four different surface preparation methods was carried out. It was determined that the gentle abrading necessary for affixing strain gages produced a negligible density and depth of flaws and did not lower the mechanical properties. 5 figures, 2 tables.
Date:
September 19, 1977
Creator:
Hanafee, J. E.; Hughes, Jr., J. W. & McInturff, S. A.
Object Type:
Report
System:
The UNT Digital Library
Alternate fuel cycle technologies. Quarterly report, April--June 1977
This quarterly report describes studies to provide information needed to close the back end of the commercial light-water reactor (LWR) fuel cycle. These efforts are directed primarily at reprocessing and recycle of uranium and plutonium from spent LWR fuel. Research is reported in the following categories: environmental studies, fuel receipt, head-end processes, purex process, waste management, safeguards (dose rate for extraction streams), and general support.
Date:
September 1, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced-fueled fusion reactors suitable for direct energy conversion. Fourth quarterly progress report: October 1976--December 1976 and first quarterly progress report: January 1977--March 1977
The direct energy conversion efficiencies calculated for Cat-D and D-/sup 3/He fueled Tokamak reactors are summarized over a range of reactor designs, collector configurations, assumed T/sub e//T/sub i/ ratios, and power densities. The performance of a system of superconducting coils that produce those fields required to guide escaping plasma along the path between the bundle divertor coils and the direct converter is also discussed.
Date:
September 9, 1977
Creator:
Blum, A. S.
Object Type:
Report
System:
The UNT Digital Library
Analysis of Lime-Slurry Stirred Tank Carbonation Reactor
Gas residence time distributions were determined for a stirred tank carbonation reactor. Empirical correlations for the first and second moments of the residence time distribution (RTD) curves as functions of flow rates and impeller speeds were obtained. Decontamination factors for /sup 85/Kr were measured.
Date:
September 23, 1977
Creator:
McAleese, J. P.; Belt, B. A.; Datesh, J. R. & Shaeffer, M. C.
Object Type:
Report
System:
The UNT Digital Library
Spectra of matrix isolated metal atoms and clusters. [In rare gases]
The matrix isolation spectra of all of the 40 presently known atomic metal species show strong matrix effects. The transition energies are increased, and the bands are broad and exhibit splitting of sublevels which are degenerate in the gas phase. Several models have been proposed for splitting of levels, but basic effects are not yet understood, and spectra cannot be predicted, yet it is possible to correlate gas phase and matrix in many of the systems. Selective production of diatomics and clusters via thermal and optical annealing of atomic species can be monitored by optical spectra, but yields spectroscopically complex systems which, however, especially in the case of transition metals, can be used as precursors in novel chemical reactions. A combination of absorption, emission, ir, Raman, ESR, and other methods is now quickly yielding data which will help correlate the increasing wealth of existing data. 55 references, 6 figures.
Date:
September 30, 1977
Creator:
Meyer, B.
Object Type:
Article
System:
The UNT Digital Library
Performance of Argus as a laser fusion facility
During the fifteen months that the Argus laser facility has been operating we have had two primary goals. These are: (1) to provide focusable, well characterized, high power beams for laser fusion experiments and (2) to further understand the propagation of high power and energy pulses. The propagation experiments have already led to increases in the laser output power and system reliability. Pulses appropriate for advanced targets are shaped to optimize the compression and heating of the target. In general they stress the laser in both limits of energy and power. In this work several results significant to the laser fusion program were realized. The neutron output of fusion targets increased by almost two orders of magnitude to more than 10/sup 9/ neutron/shot. An improved beam propagation technique (image relaying) was developed and partially implemented. It increased the focusable output power for short pulses (30-100 ps) to more than 4.0 TW. More than one kilojoule/beam was extracted from the laser in a high quality beam in a one nanosecond Gaussian pulse. A complex two step optical pulse was generated and successfully amplified to peak powers of more than 3.0 TW. The most recent of the system upgrades are complete image …
Date:
September 19, 1977
Creator:
Speck, D. R.; Simmons, W. W.; Hunt, J. T.; Boyle, M. J.; Rainer, F.; Storm, E. K. et al.
Object Type:
Article
System:
The UNT Digital Library
Energy calibration scheme for acoustic emission
The calibration technique described is an attempt to determine the actual energy release from the events causing emission bursts in beryllium and to quantitatively evaluate the effects of specimen geometry on the apparent energy per burst. (GHT)
Date:
September 13, 1977
Creator:
Adams, R. O. & Heiple, C. R.
Object Type:
Article
System:
The UNT Digital Library
One-dimensional approximate technique for earth penetration calculations
The penetration process is approximated by the one-dimensional expansion of a cylindrical cavity in an infinite solid. Linear and quadratic forms are used to describe, piecewise, the volumetric response of the target during loading at the shock front. It is assumed that the density locks at the shocked state. The shear strength of the target is taken to be a piecewise linear function of pressure. However, it is assumed that the target material is weak in shear and, thus, that the effect of shear strength can be treated as a perturbation on the hydrodynamic solution. For conical-nosed penetrators an analytic expression for the normal stress results from the analysis, while for ogival-nosed penetrators the solution must be obtained numerically. A computer program, PENAP, was written to treat both the ogive and cone geometry, and PENAP solutions were found to agree well with both experimental data and TOODY, two-dimensional finite-difference wavecode results. It should also be noted that the PENAP calculations typically required several orders of magnitude less computer time than did the TOODY calculations.
Date:
September 1, 1977
Creator:
Yarrington, P.
Object Type:
Report
System:
The UNT Digital Library
Stability of space-charge neutralized beams
Consideration is given to the stability of negative ion beams which are neutralized through ionization of a background gas. Two types of instabilities are examined. First, beam-plasma instabilities are analyzed with the dispersion relation showing that they are unimportant if the beam velocity is less than the electron thermal velocity. Second, results of a computer simulation on the flow of a cylindrical beam and the resulting background plasma show that when the background neutral gas density is less than or approximately equal to a critical density as instability occurs. This critical density is the density that would be needed to space-charge neutralize the beam if the positive ions were not retarded by the beam. An approximate dispersion relation indicates that the nature of the instability is a transverse positive-ion acoustic wave which couples to the beam.
Date:
September 22, 1977
Creator:
Turnbull, R. J. & Hooper, E. B. Jr.
Object Type:
Article
System:
The UNT Digital Library
Production equipment development needs for a 700 metric ton/year light water reactor mixed oxide fuel manufacturing plant
A literature search and survey of fuel suppliers was conducted to determine how much development of production equipment is needed for a 700 metric tons/y LWR mixed-oxide (UO/sub 2/--PuO/sub 2/) fuel fabrication plant. Results indicate that moderate to major production equipment development is needed in the powder and pellet processing areas. The equipment in the rod and assembly processing areas need only minor development effort. Required equipment development for a 700 MT/y plant is not anticipated to delay startup of the plant. The development, whether major or minor, can be done well within the time frame for licensing and construction of the plant as long as conventional production equipment is used.
Date:
September 1, 1977
Creator:
Blahnik, D.E.
Object Type:
Report
System:
The UNT Digital Library
Water testing of the inducer pump. [LMFBR]
The inducer pump, designed and fabricated as a test article to evaluate the inducer/impeller pump concept for providing improved suction performance of large sodium pumps, met or exceeded all performance goals. The inducer stage in front of the centrifugal impeller dramatically reduces the size of pumps. It was demonstrated that the inducer can operate at suction specific speeds in excess of 35,000, whereas conventional centrifugal pumps have demonstrated capability to only 12,000. The inducer pump employs several components of the 2000 and 4000 gpm NaK pumps from the Connecticut Aircraft Nuclear Engine Laboratory (CANEL) Programs. Use of the volute, thermal barrier and shaft oil seal from the CANEL pumps allowed acceleration and cost reduction of the Inducer Pump Program.
Date:
September 15, 1977
Creator:
Dunn, C. & Hoshide, R.K.
Object Type:
Report
System:
The UNT Digital Library
Equation of state of beryllium
A new, wide-range equation of state (EOS) has been constructed for Be. The composite theoretical model incorporates ionization equilibrium and condensed-matter and multiphase physics. It also satisfies all thermodynamic equilibrium constraints. The theoretical EOS has been compared with all available high-pressure and high-temperature Be data, and satisfactory agreement is generally achieved. The most interesting feature is the theoretical prediction of melting at just below 220 GPa (2 Mb), indicating an extremely wide pressure range for solid Be. A striking feature is the appearance of shell-structure effects in physical-process paths: 2 large loops appear on the principal Hugoniot and the behavior of release isentropes from rho = rho/sub 0/ is significantly affected.
Date:
September 15, 1977
Creator:
Graboske, H. & Wong, L.
Object Type:
Report
System:
The UNT Digital Library