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5,469 Matching Results
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Results of Experiments Made With U.S.B.M. Electrocerium
Data obtained in test of Bureau of Mines electrocerium are presented. The cerium was subjected to spectrochemical analysis, x-ray diffraction analysis, thermal analysis, metallographic tests, and high-pressure experiments.
Date:
February 26, 1959
Creator:
Miner, William N.
Object Type:
Report
System:
The UNT Digital Library
Studies of Reactor Containment : Monthly Technical Progress Report No. 32
The report covers work performed during the period December 1, 1959 through December 31, 1959. The general objectives of the program of "Studies of Reactor Containment" are to accomplish theoretical and experimental investigations of the loads to which external containment structures for nuclear reactors are subjected in the vent of a violent incident at the reactor core, the evaluation of methods of reducing that loading, and the study of the response of and design criteria for external containment structures as a result of such loading. Progress of technical effort during the report period is summarized for each of the eight tasks of the program..
Date:
January 15, 1960
Creator:
Zaker, T. A. (Thomas Allen)
Object Type:
Report
System:
The UNT Digital Library
Low Energy Nuclear Physics : Second Annual Report for the Period February 1, 1959 to January 31, 1960
The general expression for the angular correlation between radiations produced in successive cascade transitions is derived by use of Racah algebra. The result is then specialized to the beta - gamma correlation and applied to two cases in which additional properties of the photon are specified, the circular polarization and the plane polarization. The prospect of testing time reversal and determining nuclear matrix element ratios by beta - gamma correlation measurements is explored using the nuclide Tm/sup 170/ as an example. The directional angular correlation between the 2.31-Mev beta and the subsequent 0.605-Mev gamma emitted in the decay of Sb/sup 124/ was measured as a function of the beta energy. The K-conversion coefficient of the 279-kev gamma following beta decay of Hg/sup 203/ was measured by comparing the x-ray and gamma intensities in a scintillation spectrometer. The measured valve of alpha /sub k/ = 0.195 plus or minus 0.014 indicates that the transition is M1 with E2 mixed to the extent of 63%. The angular correlation of the 107-1.24 Mev gamma cascade in Zn/sup 68/ following the decay of 68-min Ga/sup 68/ is shown. The Legendre polynomial expansion coefficients were deter-gular correlation in the decay of Sb/ sup 118/ was …
Date:
January 23, 1960
Creator:
Jastram, Philip S. (Philip Sheldon), 1920-1992
Object Type:
Report
System:
The UNT Digital Library
Research on Krypton 85 : Seventh Monthly Progress Report Covering December 1, 1959 to December 31, 1959
Work during this report period includes a continuation of the study of the effect of krypton 85 on the polymerization of styrene; an attempt at evaluation of the polymers produced; and the effect of krypton radiation on the electrical properties of gases, such as the rare gases, and nitrogen, and oxygen. the results obtained are summarized in the report.
Date:
January 21, 1960
Creator:
Miller, H. S.; Marancik, W. G. & Zufall, J.
Object Type:
Report
System:
The UNT Digital Library
Upper Atmosphere Monitoring Program : Progress Report No. 8 for May 1, 1959 through July 31, 1959
The overall scope of the program encompasses both research into the physical parameters involved in the collection of airborne radioactive particles and the development, fabrication and calibration of balloon-borne sampling equipment to enable the precise determination of stratospheric particle concentration and particle size distribution.
Date:
January 15, 1960
Creator:
Baumstark, J.; Jones, S.; Stern, S.; Torgeson, L. & Zeller, W.
Object Type:
Report
System:
The UNT Digital Library
Progress Report for Period Covering January 15, 1960 - February 15, 1960
Thorium Procedure: As was mentioned in the last report, ammonium nitrate was substituted for ferric nitrate as a salting agent. Also, the acidity of the nitrate solution was reduced from 3.0 molar to 0.5 molar. the revised thorium procedure is described in the report. Radium Procedure: Work has ben initiated on the procedure of Petrow, Nietzel and DeSesa (Winchester Procedure) to determine if the procedure is suitable for very low level concentrations of radium.
Date:
February 15, 1960
Creator:
Petrow, Henry G.
Object Type:
Report
System:
The UNT Digital Library
The Influence of Point Defects on the Mechanical Properties of Lithium Fluoride : First Technical Report
Lithium fluoride crystals were quenched into silicone oil from near the melting point. The return to an equilibrium structure during annealing was observed by means of mechanical tests and etching techniques. Crystals containing three levels of impurity, zone refined, commercially pure, and doped with 0.05 mole per cent magnesium, were used in order to separate the effects of foreign ions from those of thermal vacancies. The changes of mechanical properties produced by quenching and by subsequent annealing were generally attributable to point defect-dislocation interactions. Precision density determinations indicated that about 10% of the equilibrium concentration of vacancies at the melting point was retained at room temperature by the quench. The density could be restored to its normal value by annealing. Two important annealing stages were observed. At about 200 deg C the precipitation of impurities retained in solution by the quench caused a sharp increase in the hardness as measured at room temperature. Isothermal annealing revealed the hardening process to have an activation energy of about 0.5 ev which is probably the energy for migration of an associated magnesium ion-lithium vacancy pair. Between 300 and 400 deg C the removal of dislocations and probably vacancy clusters resulting from the quench …
Date:
January 1960
Creator:
Nadeau, J. & Washburn, J.
Object Type:
Report
System:
The UNT Digital Library
The SNAP II Power Conversion System. Topical Report No. 3. Dynamic Analysis
SNAP II is the designation for a nuclear auxiliary power unit, designed primarily for utilization in the WS117L satellite vehicle. The SNAP II system consists of a reactor heat source, a mercury Rankine engine, and an alternator. Dynamic analysis of the power conversion system was conducted utilizing a comprehensive analog computer simulation. Feasibility of a parasitic load control for numerous system disturbances was demonstrated. This analysis was performed under a subcontract to to Atomics International as part of the Atomic Energy Commission Contract No. AT(11-1)-GEN-8.
Date:
January 15, 1960
Creator:
Deibel, David L.; Mrava, Gene L. & Seldner, Kurt
Object Type:
Report
System:
The UNT Digital Library
Tests of Models of Nuclear Reactor Elements
"These two parts were issued separately, but are cataloged as a unit. For a model of a blanket sub-assembly of the proposed Atomic Power Development Associates reactor, laboratory measurements have been made of the head losses for the blanket element and for the various distributing orifices. Tests with water have been generalized so that the results provide design criteria for liquid sodium which is to be used in the reactor."
Date:
March 1957
Creator:
McNown, J. S.; Yih, C. S.; Yagle, R. A. & O'Dell, W. W.
Object Type:
Report
System:
The UNT Digital Library
Tests of Models of Nuclear Reactor Elements
"For a model of a blanket sub-assembly of the proposed AODA reactor, laboratory measurements have been made of the head losses for the blanket element end for the results provide design criteria for liquid sodium which is to be used in the reactor."
Date:
March 1956
Creator:
McNown, J. S.; Yagle, H. A. & O'Dell, W. W.
Object Type:
Report
System:
The UNT Digital Library
On the Calculation of Properties of Gases at High Temperatures
"The role of the potential of intermolecular force in determining properties of gases at elevated temperatures is discussed. Coefficients of viscosity and self diffusion, isotopic reduced thermal diffusion ratios, and second virial coefficients for helium, argon, and nitrogen at 1,000, 5,000, and 15,000 d K were calculated from extrapolated potentials and from beam potentials."
Date:
August 1, 1958
Creator:
Amdur, I. & Ross, J.
Object Type:
Report
System:
The UNT Digital Library
Polarographic Reduction of Uranium (VI)
"Previous studies of the effect of uranium species on the polarographic behavior of certain organic compounds indicated the advisability of further study of uranium itself. The polarographic reduction of U(VI) to U(V) in acid solution is very sensitive to both type and concentration of anion present. Consequently, the reduction was studied using perchlorate as a non-complexing anion and sulfate as a complexing anion. In HCLO4 solution, increasing the perchlorate concentration shifted E(1/2) to more positive potentials, which seem to correspond to junction potential effects. Increasing either HCLO4 or perchlorate concentrations increased the limiting current slightly, which can be attributed to a high rate of disproportionation of U(V); other factors, e.g., viscosity of the solution, tend to counteract the effect of the disproportionation. In sulfate media, UO2+ is not strongly complexed, the association constant for the U(V)-sulfate complex being 0.15, if UO2SO4 is the most stable uranyl sulfate complex present. The effect of acid on the stability of the uranyl sulfate complex confirmed the existence of the complex as an uncharged species. Limiting currents were pseudo diffusion-controlled, e.g., increasing the solution viscosity by increasing the electrolyte content decreased the current; this is due to the maximum disproportionation rate of U(V) having …
Date:
July 14, 1958
Creator:
Elving, Philip J. & Krivis, Alan F.
Object Type:
Report
System:
The UNT Digital Library
Correlation of Polarographic Walf-Wave Potentials With Nuclear Magnetic Resonance "Chemical Shifts"
"Since nuclear magnetic resonance ''chemical shifts'' are considered to be good measures of electron densities in molecules, the extent to which they can be correlated with the polarographic half-wave potentials of organic compounds has been surveyed. To extend the applicability and interpretation of the proposed correlation, parallel correlation of E, with Hammett's sigma and Taft's sigma parameters were made, since both of the latter are also regarded as indication of electronic distribution at the reactive center. The data in general support the view that changes in half-wave potential with structure are due to both electronic and steric effects, as well as perhaps to adsorption phenomena. Significantly, NMR data obtained with one type of substituent could be correlated with E/sub 1/2 data for a similar type of substituent. New NMR data for aliphatic nitro and halogen compounds are reported."
Date:
July 28, 1958
Creator:
Bennett, Eugene C. & Elving, Philip J.
Object Type:
Report
System:
The UNT Digital Library
Engineering Report
"An evaporator system was developed and tested which will concentrate two types of non-radioactive wastes. The wastes were of the slurry type within initial concentration of 32% solids and a final concentration of 7O% solids by weight. Information concerning design practices for this type of evaporator, startup and operating procedures, methods of recovery from unexpected shutdown, and procedures for descaling was gained. The test waste was synthetic and not radioactive; however, the procedures were evolved for application to radioactive materials. In addition, over-all heat transfer rates as a function of temperature difference and the relationship between percent concentration and boiling point for the two wastes were obtained."
Date:
October 15, 1956
Creator:
Carnavos, Theodore C.
Object Type:
Report
System:
The UNT Digital Library
Feasibility Study of Superflux Reactor
"The feasibility of a three-region aqueous homogeneous reactor designed to produce a maximum thermal flux at the center of 10/sup 16/ n/cm/sup 2/ -sec is investigated. Inner and outer regions of pure D/sub 2/O and an intermediate region of uranyl sulfate in D/sub 2/O are considered. Characteristics were calculated for the case R/sub 1/ = 40 cm, R/sub 2/ = 60 cm, and R/sub 3/ = 150 cm."
Date:
December 20, 1956
Creator:
Bolger, J. C.; D'Urso, S. F. & Mask, R. O.
Object Type:
Report
System:
The UNT Digital Library
Alternating Current Polarography: Evaluation of the Accuracy of the Data and Calculation Procedures
"The data obtained by a-c polarography, when used to determine electrode parameters such as heterogeneous rate constant and when used as an analytical tool, are evaluated. Certain aspects of the experimental approach both in measurement and calculation are reviewed. The importance and means of correcting for the series resistance of the cell system itself and of using equations which take into account the phase differences between the faradaic and capacitive currents are developed. Other topics reviewed include the nature of the dependence of the peak a-c on depolarizer concentration, effect of adsorption of depolarizer and electrode, and a simplified procedure for quantitative analysis."
Date:
July 23, 1958
Creator:
Bauer, Henry H. & Elving, Philip J.
Object Type:
Report
System:
The UNT Digital Library
Rapid Reading of Large Binary Scales
"A chart is presented for use in the rapid conversion of octal to decimal numbers. Tabulated data compare the decimal and octal systems, and decimal and binary numbers up to 19/sub 10/ = 10,011/sub 2/. Application of the data in reading scaling circuits is discussed."
Date:
January 1, 1955
Creator:
Anderson, Ernest C.
Object Type:
Report
System:
The UNT Digital Library
The Armour Dust Fueled Reactor (Adfr)
"Study of the ADFR concept included experimental work on fuel dust suspension stability and redispersibility, erosion, and dust deposition using the fuel dust circulation loop. Some theoretical work was done in the areas of reactor safety and breeding."
Date:
October 31, 1958
Creator:
Loewe, W. E. & Krucoff, D.
Object Type:
Report
System:
The UNT Digital Library
An Investigation of Scaling of Zirconium at Elevated Temperatures
"Single crystals of iodide zirconium were oxidized to determine any lattice relationship existing between zirconium and the oxide overlay, and a review of experimental data and proposed theories to explain the oxidation behavior of zirconium was made. A method of measuring the rate and depth of gas diffusion in alpha zirconium was devised, and calculations were made for the temperature range 900 to 1200 deg C using samples scaled in air, oxygen, and nitrogen. The consumption rates at lower temperatures were estimated from solutions to the diffusion equation. Distribution of gas during scaling was investigated. In general, breakaway occurs at shorter scaling, and the growth rate increases as the impurity level of zirconium is raised and the scaling atmosphere is changed from oxygen to air."
Date:
November 6, 1958
Creator:
Probst, H. B.; Evans, E. B. & Baldwin, W. H. Jr.
Object Type:
Report
System:
The UNT Digital Library
SM-1 Research and Development Quarterly Report : July 1, 1959 to September 30, 1959
This report covers research and development conducted by the ALCO Products, Inc. The report includes progress made in plant water chemistry and health physics practices.
Date:
January 15, 1960
Creator:
Obrist, C. H.
Object Type:
Report
System:
The UNT Digital Library
Thermal Stress Testing of SM-2 Fuel Elements : Interim Technical Report
To determine thermal stability of SM-2 plate type fuel elements, test specimens were subjected to reactor operating temperature differences.
Date:
unknown
Creator:
Christenson, J. A.
Object Type:
Report
System:
The UNT Digital Library
SM-2 Reactor Core and Vessel Monthly Report
This report contains the significant progress made on the SM-2 core and vessel program
Date:
February 19, 1960
Creator:
Gallagher, J. G.
Object Type:
Report
System:
The UNT Digital Library
A Corrosion Study of Welded Stainless Steel Fuel Elements
This report covers fuel element corrosion studies conducted from April,1959 through July,1960, designed to aid in selecting and evaluating SM-2 fuel element welding techniques
Date:
December 22, 1960
Creator:
Bergen, C. R.
Object Type:
Report
System:
The UNT Digital Library
SM-2 Clutch Testing
The criteria and methods for test evaluation of electro-magnetic clutch characteristics are discussed
Date:
March 23, 1960
Creator:
Hauenstein, G. C.
Object Type:
Report
System:
The UNT Digital Library