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Prototype gauge for measuring contour and wall thicknesses of hemispherical parts. [Interferometer]
A prototype gauge (gage) was designed and fabricated using air bearings in a new configuration to provide less error and distortion during inspection of hemispherical parts. No wear occurs on the moving parts during operations and accuracy of alignment is maintained. The gauge will check outside radial distance, inside radial, and outside radial and wall, and inner radial and wall thicknesses of parts. The gauge contains only four moving parts, which increases the measuring accuracy. A horizontal table rotates. A table mounted on the horizontal table at 45/sup 0/ rotates through two transducers. All moving parts are mounted on hydrostatic gas bearings. Laser interferometric, air-bearing gauge heads are used to obtain the required data. Investigation of a hemispherical part is in any desired spiral path from equator to pole. Measurement information is obtained from two laser interferometric transducers using linear air bearings. The transducers use a Spectra Physics Model-120 helium and neon laser. Working range of each transducer is 1.5 inches. The fringe voltage signals are amplified and converted to inches to be displayed on a digital readout. A punched paper tape contains the nominal inside diameter (ID) and outside diameter (OD) information in Binary Coded Decimal form. The tape …
Date:
March 1, 1976
Creator:
Aarts, H. J. & Robertson, J. H.
Object Type:
Report
System:
The UNT Digital Library
Rankine cycle energy conversion system design considerations for low and intermediate temperature sensible heat sources. Geothermal, waste heat, and solar thermal conversion
Design considerations are described for energy conversion systems for low and intermediate temperature sensible heat sources such as found in geothermal, waste heat, and solar-thermal applications. It is concluded that the most cost effective designs for the applications studied did not require the most efficient thermodynamic cycle, but that the efficiency of the energy conversion hardware can be a key factor.
Date:
October 1, 1976
Creator:
Abbin, J. P. Jr.
Object Type:
Report
System:
The UNT Digital Library
Heat Extraction from a Hydraulically Fractured Penny-Shaped Crack in Hot Dry Rock
Heat extraction from a penny-shaped crack having both inlet and outlet holes is investigated analytically by considering the hydraulic and thermal growth of the crack when fluid is injected at a constant flow rate. The rock mass is assumed to be infinitely extended, homogeneous, and isotropic. The equations for fluid flow are derived and solved to determine the flow pattern in the crack. Temperature distributions in both rock and fluid are also determined. The crack width change due to thermal contraction and the corresponding flow rate increase are discussed. Some numerical calculations of outlet temperature, thermal power extraction, and crack opening displacement due to thermal contraction of rocks are presented for cracks after they attain stationary states for given inlet flow rate and outlet suction pressure. The present paper is a further development of the previous works of Bodvarsson (1969), Gringarten et al. (1975), Lowell (1976), Harlow and Pracht (1972), McFarland (1975), among others, and considers the two-dimensional rather than the one-dimensional crack. Furthermore, the crack radius and width are quantities to be determined rather than given a priori. 11 refs., 1 tab., 5 figs.
Date:
December 1, 1976
Creator:
Abe, H.; Mura, T. & Keer, L.M.
Object Type:
Article
System:
The UNT Digital Library
Diffusion of gases in solids: rare gas diffusion in solids; tritium diffusion in fission and fusion reactor metals. Final report
Major results of tritium and rare gas diffusion research conducted under the contract are summarized. The materials studied were austenitic stainless steels, Zircaloy, and niobium. In all three of the metal systems investigated, tritium release rates were found to be inhibited by surface oxide films. The effective diffusion coefficients that control tritium release from surface films on Zircaloy and niobium were determined to be eight to ten orders of magnitude lower than the bulk diffusion coefficients. A rapid component of diffusion due to grain boundaries was identified in stainless steels. The grain boundary diffusion coefficient was determined to be about six orders of magnitude greater than the bulk diffusion coefficient for tritium in stainless steel. In Zircaloy clad fuel pins, the permeation rate of tritium through the cladding is rate-limited by the extremely slow diffusion rate in the surface films. Tritium diffusion rates through surface oxide films on niobium appear to be controlled by cracks in the surface films at temperatures up to 600/sup 0/C. Beyond 600/sup 0/C, the cracks appear to heal, thereby increasing the activation energy for diffusion through the oxide film. The steady-state diffusion of tritium in a fusion reactor blanket has been evaluated in order to …
Date:
September 1, 1976
Creator:
Abraham, P. M.; Chandra, D.; Mintz, J. M.; Elleman, T. S. & Verghese, K.
Object Type:
Report
System:
The UNT Digital Library
Neutron-induced mutation experiments. Progress report, March 1, 1976--February 28, 1977. [In Drosophila]
Results are from studies of experiments in Drosophila on the relative mutagenic effectiveness of neutrons of different energies employing X-linked recessive lethal and specific locus mutation tests. The energies and doses employed to data are .43 MeV (500, 1000, and 1500 R, in progress), .68 MeV (250, 500, 1000, and 1500 R), 2 and 6 MeV (250 and 500 R), and 15 MeV (250, 500, 1000, 1500 and 3000 R). .68 MeV neutrons appear to have an RBE between 3.3 to 4.5, 15 MeV neutrons an RBE between 1.9 to 2.2, and 2 and 6 MeV neutrons RBE's of intermediate values. The data for both .68 and 15 MeV neutrons do not yet differentiate between a linear and quadratic dose/frequency response curve for the doses studied. The specific locus mutation data also indicate the highest RBE for .68 MeV, followed by 2 and 6 MeV respectively.
Date:
November 1, 1976
Creator:
Abrahamson, S.
Object Type:
Report
System:
The UNT Digital Library
Genetic effects of low x-ray doses. Progress report, October 1, 1975--September 30, 1976. [Drosophila oogonia]
Experiments on dose-kinetics of x-ray induced sexlinked lethal mutations in Drosophila oogonia were continued. A wide range of doses was tested, with special emphasis on the low-dose range (20 to 500R). This year more data were added for O R, 200, 500, 1500R and some high doses. Oogonia of adult females were irradiated, and only one daughter from each experimental parent-female was analyzed for a new lethal in her maternal X-chromosome. Thus no clusters of mutations of identical origin are encountered. The extensive accumulated data do not support the linearity principle, firmly established for recessive mutations induced in mature spermatozoa for high doses down to very low x-ray doses. A mathematical model describing the mutational yield is included that suggests that recessive mutations, like chromosome aberrations, result from both one-track and two-track events, with the latter playing an increasingly important role at higher doses.
Date:
September 1, 1976
Creator:
Abrahamson, S. & Meyer, H. U.
Object Type:
Report
System:
The UNT Digital Library
Heat transfer in tube bundles of heat exchangers with flow baffles induced forced mixing
Thermal analysis of shell-and-tube heat exchangers is being investigated through geometric modeling of the unit configuration in addition to considering the heat transfer processes taking place within the tube bundle. The governing equations that characterize the heat transfer from the shell side fluid to the tube side fluid across the heat transfer tubewalls are indicated. The equations account for the heat transfer due to molecular conduction, turbulent thermal diffusion, and forced fluid mixing among various shell side fluid channels. The analysis, though general in principle, is being applied to the Clinch River Breeder Reactor Plant-Intermediate Heat Exchanger, which utilizes flow baffles appropriately designed for induced forced fluid mixing in the tube bundle. The results of the analysis are presented in terms of the fluid and tube wall temperature distributions of a non-baffled and baffled tube bundle geometry. The former case yields axial flow in the main bundle region while the latter is associated with axial/cross flow in the bundle. The radial components of the axial/cross flow yield the necessary fluid mixing that results in reducing the thermal unbalance among the heat transfer to the allowable limits. The effect of flow maldistribution, present on the tube or shell sides of the …
Date:
January 1, 1976
Creator:
AbuRomia, M. M.; Chu, A. W. & Cho, S. M.
Object Type:
Article
System:
The UNT Digital Library
Brownian motion of interacting particles
Guided by the descriptions which are used to describe noninteracting particles, it is argued that the generalized Smoluchowski equation, including the hydrodynamic interaction and corrections for ion cloud effects may be used to describe interacting particles for the temporal and spatial regimes probed by light beating spectroscopy. This equation is then used to find cumulants of decay of the intermediate scattering function. The generalized Smoluchowski equation is reduced to a simple diffusion equation. The resulting diffusion constant depends upon the interparticle forces and is reminiscent of some early descriptions for interacting systems. The generalized Smoluchowski equation is solved for the model system of a linear chain of colloidal particles interacting via nearest neighbor harmonic couplings. The results for the intermediate scattering function and the static structure factor are very reminiscent of corresponding measurements made for interacting colloidal systems. (GHT)
Date:
January 1, 1976
Creator:
Ackerson, B. J.
Object Type:
Report
System:
The UNT Digital Library
Distribution of xenon between gaseous and liquid CO/sub 2/
The distribution of xenon at low concentrations between gaseous and liquid CO/sub 2/ was measured over essentially the entire liquid range of CO/sub 2/. These measurements involved using a collimated radiation-detection cell to determine the relative quantities of /sup 133/Xe-traced xenon in the separate phases contained in a vertical cylinder under isothermal conditions. The results are expressed in terms of a distribution ratio (mole fraction of xenon in the gaseous phase divided by mole fraction of xenon in the liquid phase) which decreased from 7.53 at -54.8/sup 0/C to 1.10 at 30.5/sup 0/C. These data were used to calculate various other solubility-related quantities.
Date:
October 1, 1976
Creator:
Ackley, R. D. & Notz, K. J.
Object Type:
Report
System:
The UNT Digital Library
Vapor deposition of large area NpO/sub 2/ and UO/sub 2/ deposits
Deposition of NpO/sub 2/ and UO/sub 2/ thin films over an area of 7.5 to 10 cm diam has become a routine operation in preparation of fission chamber plates. Vacuum evaporation or electroplating has been used for this purpose. The ''paint brush'' technique has been used as well; however, uniformity requirements normally eliminate this procedure. Vapor deposition in vacuum appears to be the most suitable technique for preparing NpO/sub 2/ and UO/sub 2/ deposits of >200 cm/sup 2/. This paper describes the procedures used in preparing uniform large area deposits of NpO/sub 2/ (approximately 300 cm/sup 2/) and UO/sub 2/ (approximately 2000 cm/sup 2/) by vacuum evaporation using electron bombardment heating and several substrate motion and heating methods to achieve uniformity and adhesion.
Date:
January 1, 1976
Creator:
Adair, H. L.; Gibson, J. R.; Kobisk, E. H. & Dailey, J. M.
Object Type:
Article
System:
The UNT Digital Library
Research and development efforts relative to superconducting materials. Final report. [Nb/sub 3/Sn tapes]
Three processes for the production of low-loss superconducting tapes of Nb/sub 3/Sn were investigated. They are the rolled-bronze process, the electron beam (EB) bronze deposition process, and the high-rate sputtering process. Shortly after the start of the investigation, effort on the last two processes was suspended because the process-development time that would be needed to arrive at a suitable transmission-line tape appeared most likely to be the shortest with the rolled-bronze process. Long lengths of Nb/sub 3/Sn tapes were prepared by the rolled-bronze process from extruded and rolled bronze-clad niobium billets. Tapes were stabilized by removing the bronze layer after reaction and then coating the exposed Nb/sub 3/Sn with high-purity copper by EB evaporation. Several meters of high quality Nb/sub 3/Sn tapes were produced by the rolled-bronze process. Even when the tapes were stabilized with copper, the losses were as low as 1.8 ..mu..W/cm/sup 2/ at 4.2 K and a surface current density of 500 rms A/cm. Despite early curtailment of the effort on the EB bronze-deposition process, short samples of Nb/sub 3/Sn tapes were produced.
Date:
April 1, 1976
Creator:
Adam, E; Beishcher, P; Marancik, W; Lucariello, R & Young, M
Object Type:
Report
System:
The UNT Digital Library
LX-13 component development scale up evaluation
The intermediate phase oif the continuous PETN process development has been completed. After the initial development oif the process on a small scale, the intermediate step was to determine if the process will scale up to a production lot size and still maintain adequate performance. Preliminary data indicate that this process is feasible on a production scale. Three 18-kg lots (production size) showed good repeatable performance, firing on all tracks while maintaining acceptable extrudability.
Date:
October 1, 1976
Creator:
Adams, J. C.; Osborn, A. G. & Stallings, T. L.
Object Type:
Report
System:
The UNT Digital Library
LX-13 processing. Progress report, January--March 1976
Results were obtained from two LX-13 lots formulated from PETN precipitated at a reduced temperature by the continuous method. The firing performance of the LX-13 was significantly improved while maintaining acceptable extrudability. Burning was complete in all of the tracks. Three additional PETN batches have been precipitated at reduced temperatures in order to further evaluate the effect of reduced temperatures on extrudability and detonability. One of these PETN batches was scaled up to the production PETN batch size of 18 kg.
Date:
January 1, 1976
Creator:
Adams, J. C.; Osborn, A. G. & Stallings, T. L.
Object Type:
Report
System:
The UNT Digital Library
Advanced geothermal primary heat exchanger (APEX). Quarterly progress report Q-3, 1 January 1976-31 March 1976
The APEX program is designed to investigate the concept that a continuously recirculating flow of fine solid particles in the brine stream will substantially retard the formation of scale in the primary heat exchanger. The primary technical effort during this reporting period has been the installation, checkout and calibration of the test system under a variety of flow conditions. The baseline heat transfer tests and the baseline recirculating bed tests have been completed. Work is in progress for the characterization of candidate geothermal fluid simulants. (MHR)
Date:
January 1, 1976
Creator:
Addoms, J. F.
Object Type:
Report
System:
The UNT Digital Library
Advanced geothermal primary heat exchanger (APEX). Quarterly progress report Q-4, 1 October 1976-31 December 1976
The current program status relative to the schedule and key mileposts is described. The technical progress meetings held between ALRC and LBL personnel are summarized. A technical discussion is presented covering the experiment design, process equipment selection and laboratory testing. The process flow schematic is described with the rationale for the selected approach. The process and instrumentation schematics are reviewed in detail and the operation of each test loop is described. The selected process equipment is itemized and reviewed. The status of laboratory testing at Aerojet for selected component evaluation prior to system assembly is described. A detailed test plan for laboratory and on-site field testing was prepared. The work effort planned is described. (MHR)
Date:
January 1, 1976
Creator:
Addoms, J.F.
Object Type:
Report
System:
The UNT Digital Library
Radiation-enhanced precipitation in a V-10 wt % Ti alloy
A V-10 wt % Ti alloy was irradiated with 2.7 MeV /sup 51/V/sup +/ at 650/sup 0/C to doses of 2 to 60 dpa. No void swelling was observed at any dose. The irradiation resulted in an enhancement of a precipitation process similar to that observed in unirradiated materials. The precipitates in irradiated specimens were found to have the NaCl-type cubic crystal structure with a lattice parameter of TiO. The orientation relationship between the matrix and the precipitates was the same as that observed under thermal equilibrium conditions in unirradiated materials.
Date:
January 1, 1976
Creator:
Agarwal, S. C. & Taylor, A.
Object Type:
Article
System:
The UNT Digital Library
Effects of interstitial solutes on the microstructures of self-ion irradiated vanadium
Vanadium and vanadium containing 0.1 percent C, 0.4 percent C, 1.0 percent N, and 1.0 percent O were irradiated with 3-MeV /sup 51/V/sup +/ ions in the temperature range 650 to 880/sup 0/C to a dose level of approximately 20 dpa. The results show that nitrogen is most effective in controlling the void swelling. Carbon and oxygen also suppress the swelling considerably when compared with unalloyed vanadium. Except for V-1.0 percent N, all compositions exhibit a fine platelet precipitate with (012) habit at 650/sup 0/C. In the case of vanadium-carbon alloys, this phase persisted even at higher temperatures. Vanadium and V-1.0 percent O showed fine precipitation on dislocations and void surfaces at 880/sup 0/C. V-0.1 percent C exhibited a metastable (013) carbide precipitate at 880/sup 0/C, whereas V-0.4 percent C showed equilibrium V/sub 2/C phase with some (012) precipitates. This (012) precipitation was irradiation induced and was dependent upon the carbon concentration. V-1.0 percent N did not show any evidence of precipitation over the entire temperature range.
Date:
January 1, 1976
Creator:
Agarwal, S. C.; Potter, D. I. & Taylor, A.
Object Type:
Article
System:
The UNT Digital Library
Critical properties of a simple spin glass model
The Mattis spin glass model is described as following from a particular quenched random solid solution picture, and its zero-field properties are discussed. The random field model is reviewed. The application to the spin glass problem is made and the more general scaling theory presented, and the limitations of the model are discussed. (GHT)
Date:
January 1, 1976
Creator:
Aharony, A. & Imry, Y.
Object Type:
Article
System:
The UNT Digital Library
Transport modeling in the environment using the discrete-parcel-random-walk approach
When formulating a mathematical model for simulating transport processes in the environment, the system of interest can be viewed as a continuum of matter and energy or as a large set of small discrete parcels of mass and energy. The latter approach is used in the formulation of the Discrete-Parcel-Random-Walk (DPRW) Transport Model. Each parcel has associated with it a set of spatial coordinates as well as a set of discrete quantities of mass and energy. A parcel's movement is assumed to be independent of any other parcel in the system. A Lagrangian scheme is used for computing the parcel advection and a Markov random walk concept is used for simulating the parcel diffusion and dispersion. The DPRW technique is not subject to numerical dispersion and it can be applied to three-dimensional cases with only a linear increase in computation time. A wide variety of complex source/sink terms can be included in the model with relative ease. Examples of the model's application in the areas of oil spill drift forecasting, coastal power plant effluent analysis, and solute transport in groundwater systems are presented.
Date:
April 1, 1976
Creator:
Ahlstrom, S. W. & Foote, H. P.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0403.0531]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "MEMORIAL WREATH rests at base of USS Oklahoma anchor in downtown Oklahoma City during brief service Saturday."
Date:
May 1, 1976
Creator:
Aker, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Seismological investigation of crack formation in hydraulic rock fracturing experiments and in natural geothermal environments. Progress report, September 1, 1975--August 31, 1976
A variety of new seismological methods is being developed for determining the structure of a geothermal energy source region. In one approach, seismic signals generated in the source region are utilized by interpreting them in terms of the parameters of a seismic source model. For example, using a fluid-filled tensile crack driven by excess pressure in fluid as a model of volcanic tremor, formulas are derived which relate seismic observations with model parameters, and applied the formulas successfully to an actual eruption in Kilauea, giving a new insight to the magma transport in a volcano. Theoretical work is continued on the diffraction of seismic waves by a crack and it was demonstrated that the size and location of a crack can be well determined by particle motion near the crack at various frequencies. The method was applied to Kilauea Iki and the location of the magma lens was found to be in agreement with that estimated by another method. An extensive field experiment in Kilauea Iki was carried out with the cooperation of USGS and SANDIA, and interesting properties of the magma reservoir were revealed by a multiple use of active, passive, conventional, and unconventional seismic methods. The self-contained, digital …
Date:
September 1, 1976
Creator:
Aki, K.
Object Type:
Report
System:
The UNT Digital Library
Position readout by charge division in large two-dimensional detectors. [Linear resistive electrodes]
The improvement in readout spatial resolution for charge division systems with subdivided readout electrodes has been analyzed. This readout forms the position and sum signals by a linear, unambiguous analogue summation technique. It is shown that the readout resolution is a function of only electrode capacitance and shaping parameters. The line width improves as 1/N/sup /sup 1///sub 2//, where N is the number of electrode subdivisions.
Date:
October 1, 1976
Creator:
Alberi, J L
Object Type:
Article
System:
The UNT Digital Library
HTGR accident initiation and progression analysis status report. Volume V. AIPA fission product source terms
The primary objective of the Accident Initiation and Progression Analysis (AIPA) Program is to provide guidance for high-temperature gas-cooled reactor (HTGR) safety research and development. Among the parameters considered in estimating the uncertainties in site boundary doses are uncertainties in fission product source terms generated under normal operating conditions, i.e., fuel body inventories, circulating coolant activity, total plateout activity in the primary circuit, and plateout distributions. The volume presented documents the analyses of these source term uncertainties. The results are used for the detailed consequence evaluations, and they provide the basis for evaluation of fission products important for HTGR maintenance and shielding.
Date:
February 1, 1976
Creator:
Alberstein, D.; Apperson, C. E. Jr.; Hanson, D. L.; Myers, B. F. & Pfeiffer, W. W.
Object Type:
Report
System:
The UNT Digital Library
Temporal aspects of tumorigenic response to individual and mixed carcinogens. [Response of mouse skin to benzo(a)pyrene]
Results are reported from experiments that involved either single or multiple doses of benzo(a)pyrene in mouse skin followed by prolonged observation. Preliminary results indicate linearity in dose and time and no evidence of recovery or enhancement for multiple doses of initiator given for extended periods of time. (auth)
Date:
February 1, 1976
Creator:
Albert, R. E. & Burns, F. J.
Object Type:
Report
System:
The UNT Digital Library