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75 Matching Results
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75
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Neutron reactions on $sup 239$U
None
Date:
April 24, 1975
Creator:
Gardner, D. G.
Object Type:
Report
System:
The UNT Digital Library
Structural safety features for superconducting magnets
A survey has been carried out for various potential structural safety problems of superconducting fusion magnets. These areas include: (1) Stresses due to inhomogeneous temperature distributions in magnets where normal regions have been initiated. (2) Stress distributions and yield forces due to cracks and failed regions. (3) Superconducting magnet response due to seismic excitation. These analyses have been carried out using a variety of large capacity finite element computer codes that allow for the evaluation of stresses in elastic or elastic-plastic zones and around singularities in the magnet structure. Thus far, these analyses have been carried out on UWMAK-I type magnet systems. (auth)
Date:
January 1, 1975
Creator:
Lehner, J.; Reich, M.; Powell, J.; Bezler, P.; Gardner, D.; Yu, W. et al.
Object Type:
Article
System:
The UNT Digital Library
Model calculations as one means of satisfying the neutron cross-section requirements of the CTR program
None
Date:
February 26, 1975
Creator:
Gardner, D. G.
Object Type:
Article
System:
The UNT Digital Library
A geothermal target in the Deer Lodge Valley, Montana
None
Date:
February 1, 1975
Creator:
Koenig, James B. & Gardner, Murray C.
Object Type:
Report
System:
The UNT Digital Library
Electron Transfer Experiments and Atomic Magnetism Values. Progress Report, February 1, 1975--September 30, 1975
Progress in the first seven months of this new research is described. A new apparatus was constructed, tested and moved to Oak Ridge National Laboratory for studies using the Penning ion source test facility. Preliminary electron transfer cross section results for N$sup 4+$, N$sup 5+$, He$sup 2+$ and C$sup 5+$ ions on gases were obtained. Energy loss measurements made to date support expectations that single electron transfer for multiply-charged ions colliding with gas atoms produces excited final state ions. (auth)
Date:
October 1, 1975
Creator:
Bayfield, J. E. & Hughes, V. W.
Object Type:
Report
System:
The UNT Digital Library
Cross sections for the $sup 66$Zn(n,p)$sup 66$Cu, $sup 113$In(n,n')/sup113m/ In and $sup 115$In(n,n')/sup 115m/In reactions from near threshold to 10 MeV
None
Date:
July 1, 1975
Creator:
Smith, D. L. & Meadows, J. W.
Object Type:
Report
System:
The UNT Digital Library
Chromate abatement in the Y-12 Plant's New Hope Pond
None
Date:
September 1, 1975
Creator:
DeMonbrum, J. R. & Muenzer, W. A.
Object Type:
Report
System:
The UNT Digital Library
Analysis of (n,2n) cross-section measurements for nuclei up to mass 238
All suitable measurements of the energy dependence of (n,2n) cross sections of all isotopes up to mass 238 have been analyzed. The objectives were to display the quality of the measured data for each isotope and to examine the systematic dependence of the (n,2n) cross section upon N, Z, and A. Graphs and tables are presented of the ratio of the asymptotic (n,2n) and nonelastic cross section to the neutron-asymmetry parameter (N--Z)/A. Similar data are presented for the derived nuclear temperature, T, and level-density parameter, $alpha$, as a function of N, Z, and A. This analysis of the results of over 145 experiments on 61 isotopes is essentially a complete review of the current status of (n,2n) cross-section measurements. (auth)
Date:
June 1, 1975
Creator:
Davey, W.G.; Goin, R.W. & Ross, J.R.
Object Type:
Report
System:
The UNT Digital Library
Hydrography of Onslow Bay, North Carolina: September 1975 (OBIS II)
Data collected during studies of Onslow Bay, off the North Carolina coast during cruises during September, 1975, are reported. Current meters and thermography were placed at depths of 10 and 22 m along the 28 m isobath in the northeastern and southwestern sectors of the Bay. Data are included on wind turbulence and velocity; seawater salinity and temperature at various depths; the content of nitrates, phosphates, silicate, oxygen, chlorophyll, and phytoplankton biomass at various depths. Hydrographic and meteorologic conditions during the cruises are included. (CH)
Date:
September 1, 1975
Creator:
Atkinson, L. P.; Singer, J. J.; Dunstan, W. M. & Pietrafesa, L. J.
Object Type:
Report
System:
The UNT Digital Library
Application of sensitivity analysis to a quantitative assessment of neutron cross-section requirements for the TFTR: an interim report
A computational method to determine cross-section requirements quantitatively is described and applied to the Tokamak Fusion Test Reactor (TFTR). In order to provide a rational basis for the priorities assigned to new cross- section measurements or evaluations, this method includes quantitative estimates of the uncertainty of currently available data, the sensitivity of important nuclear design parameters to selected cross sections, and the accuracy desired in predicting nuclear design parameters. Perturbation theory is used to combine estimated cross-section uncertainties with calculated sensitivities to determine the variance of any nuclear design parameter of interest. (auth)
Date:
September 1, 1975
Creator:
Gerstl, S.A.W.; Dudziak, D.J. & Muir, D.W.
Object Type:
Report
System:
The UNT Digital Library
Exposure testing and evaluation of solar utilization materials. Semiannual report, May 1, 1975--October 31, 1975
The initial efforts of a program of research and experimental testing is described in which the optical performance of materials for use in solar energy utilization devices will be determined before and after exposure to outdoor weathering tests. Materials which are currently in use and others which are being considered or developed for these applications will be characterized and exposed to natural solar radiation. Outdoor testing will be accomplished in Phoenix (Ariz.), Miami (Fla.), and Chicago (Ill.). The results of these tests, primarily the effects of outdoor exposure on optical and physical properties, will be compiled in a handbook, along with cost, availability and other pertinent information. These data are vital to the intelligent selection of solar utilization materials, since a knowledge of the cost performance and lifetime characteristics of candidate materials will greatly assist the design of efficient and reliable solar energy utilization devices. Primary accomplishments include the definition of sample requirements, specification of test samples and test configurations, formulation of acceptance/rejection criteria and contacts with numerous potential materials suppliers.
Date:
January 1, 1975
Creator:
Gilligan, J. E. & Brzuskiewicz, J.
Object Type:
Report
System:
The UNT Digital Library
Status report to USNDC
None
Date:
March 11, 1975
Creator:
Anderson, J. D. & Browne, J. C.
Object Type:
Report
System:
The UNT Digital Library
Material selection and processing for the molten lava/single tube boiler experiment
None
Date:
June 1, 1975
Creator:
Davis, M.J. & Mottern, D.J.
Object Type:
Report
System:
The UNT Digital Library
Radiative capture of fast neutrons in $sup 165$Ho and $sup 181$Ta
None
Date:
June 1, 1975
Creator:
Poenitz, W.P.
Object Type:
Report
System:
The UNT Digital Library
Patent search and review on roller-bit bearings seals and lubrication systems. [State-of-the-art]
Over 300 patents on bit design were reviewed, and the more important ones were abstracted. These patents were divided into three groups dealing with roller bit bearings, seals, and lubrication systems. Review of these patents helps identify the problems encountered by previous bit designers and establishes the current state-of-the-art of roller bit design. This report can be used as a reference for designing improved bits both for the petroleum and the geothermal industries.
Date:
October 14, 1975
Creator:
Maurer, W. C.
Object Type:
Report
System:
The UNT Digital Library
Coupled MHD-Monte Carlo transport model for dense plasmas
A two-dimensional, two fluid model of the MHD equations has been coupled to a Monte Carlo transport model of high energy, non-Maxwellian ions. The MHD part of the model assumes complete ionization and includes a perfect gas law for a scalar pressure, a tensor artificial viscosity, electron and ion thermal conduction, electron-ion coupling, and a radiation loss term. A simple Ohm's Law is used with a B/sub theta/ magnetic field. The MHD equations were solved in Lagrangian coordinates. The conservation equations were differenced explicitly and the diffusion-type equations implicitly using the splitting technique. The Monte Carlo model solves the equation of motion for high energy ions, moving through and suffering small and large angle collisions with the fluid Maxwellian plasma. The source of high energy ions is the thermonuclear reactions of the hydrogen isotopes, or it may be an externally injected beam of neutralized ions. In addition to using the usual Maxwell averaged thermonuclear cross sections for calculating the number of reactions taking place within the Maxwellian plasma, the high energy ions may suffer collisions resulting in a reaction. In the Monte Carlo model all neutrons are assumed to escape, and all energetic ions of Z less than or equal …
Date:
June 1, 1975
Creator:
Chandler, W.P.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Gas pressure from a nuclear explosion in oil shale
None
Date:
April 1, 1975
Creator:
Taylor, R.W.
Object Type:
Report
System:
The UNT Digital Library
Spectrophotometric determination of trace uranium in plutonium nitrate and oxide with 2-(2-pyridylazo)-5-diethylaminophenol
None
Date:
May 1, 1975
Creator:
Winters, W.I.
Object Type:
Report
System:
The UNT Digital Library
Thermionics. A bibliography with abstracts. Search period covered: 1970--Apr 1975. [190 references]
Research on thermionic power generation, power plant design, converter design, and basic research on thermionic materials are cited in the bibliography. Spacecraft applications are included. (Contains 190 abstracts).
Date:
April 1, 1975
Creator:
Grooms, D. W.
Object Type:
Report
System:
The UNT Digital Library
Fusion magnet safety studies program: superconducting magnet protection system and failure. Interim report
This report includes the first two quarters study of available information on schemes for protecting superconducting magnets. These schemes can be divided into two different categories. The first category deals with the detection of faulty regions (or normal regions) in the magnet. The second category relates to the protection of the magnet when a fault is detected, and the derived signal which can be used to activate a safety system (or energy removal system). The general detection and protection methods are first described briefly and then followed by a survey of the protection systems used by different laboratories for various magnets. A survey of the cause of the magnet difficulties or failures is also included. A preliminary discussion of these protection schemes and the experimental development of this program is given.
Date:
November 1, 1975
Creator:
Allinger, J.; Danby, G.; Hsieh, S. Y.; Keane, J.; Powell, J. & Prodell, A.
Object Type:
Report
System:
The UNT Digital Library
Threshold photoneutron spectroscopy of nuclei near A = 140
None
Date:
April 30, 1975
Creator:
Holt, R.J. & Jackson, H.E.
Object Type:
Article
System:
The UNT Digital Library
Solid phase welding of transition members for radioisotope thermoelectric generators
None
Date:
September 1, 1975
Creator:
Jellison, J.L.
Object Type:
Report
System:
The UNT Digital Library
Preliminary ''steam tables'' for NaCl solutions. Physical properties of the coexisting phases and thermochemical properties of the H{sub 2}O component. [80{sup 0} to 325{sup 0}C]
Preliminary ''steam tables'' which contain the physical properties of vapor-saturated aqueous sodium chloride solution and the coexisting gas are given for liquid concentrations between 0 mol NaCl/kg H{sub 2{O and halite saturation at temperatures between 80{sup 0} and 325{sup 0}C. For the same conditions, the tables give the partial molal entropy, enthalpy, and volume of H{sub 2}O in the phases. The tables were calculated from parametric equations of state.
Date:
July 1, 1975
Creator:
Haas, J. L. Jr.
Object Type:
Report
System:
The UNT Digital Library
Preliminary ''steam tables'' for NaCl solutions. Thermodynamic properties of the coexisting phases and thermochemical properties of the NaCl component
Preliminary ''steam tables'', which give the thermodynamic data for the coexisting liquid and gas and the thermochemical data for the NaCl component in the liquid for the system H{sub 2}O-NaCl, are given for liquid concentrations between 0 mol NaCl/kg H{sub 2}O and halite saturation at temperatures between 80[sup 0} and 325{sup 0}C. The tables were calculated from parametric equations of state.
Date:
October 1, 1975
Creator:
Haas, J. L. Jr.
Object Type:
Report
System:
The UNT Digital Library