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Hyperfragments produced by K^o mesons from K^+ charge exchange
"Stacks of C-2 emulsion were exposed to neutral k mesons. These were produced by the charge exchange, in dense material, of K^+ mesons from the Berkeley Bovatron. Hyperfragments were found in these stacks. It is concluded that the hyperfragments were produced by K^o2 mesons in the K^o mode. These were generated by the decay of the K^o1 component of the K^o beam as would be expected from the Gell-Man Pais scheme. Other possible mechanisms of production of the hyperfragments have been considered and shown to be unimportant."
Date:
January 1, 1958
Creator:
Baldo-Ceolin, M.; Huzita, H.; Natali, S.; Camerini, U. & Fry, W. F.
Object Type:
Report
System:
The UNT Digital Library
Revision of Product Specification for Pwr Core 1 Blanket Fuel Rod Bundle (Ap 292570 Rev. 1)
"The fuel rod bundle is a welded assembly of 120 fel rods and two supporting tube sheets. Each fuel rod contains 28 U0/sub 2/ pellets. Product and fabrication specifications for these bundles are given."
Date:
September 5, 1958
Creator:
Sharbaugh, J. E.
Object Type:
Report
System:
The UNT Digital Library
Corrosion Resistant Brazing Alloys for Zircaloy
"More than 80 experimental alloys and a few commercial alloys were used to prepare brazements of simple design for exposure in an autoclave to 600 or 680 deg F water. Alloys studied include alloys of Cu, Al, Ni, and Zr."
Date:
July 25, 1957
Creator:
Metals Research Department
Object Type:
Report
System:
The UNT Digital Library
Corrosion Resistant Brazing Alloys for Zircaloy
"This is a progress report covering the first year of work on ARF Project B 080, "Corrosion Resistant Brazing Alloys for zircaloy". the objective of the work reported is the development of filler metals suitable for the brazing of zirconium base alloys in cases where the service environment of the brazement is to be high temperature water. The experimental approach has been necessarily a somewhat empirical one. During this first year of work some forty experiments of simple design for corrosion testing in 680 degrees F water. From these preliminary screening tests. Several allows have been selected for further study and possible modification. Results of preliminary shear strength tests of these promising alloys are reported. Metallography of the joints as brazed and after corrosion testing is shown. From the findings of this research, it is judged that there is now good reason to believe that acceptable alloys can be developed for the type of application contemplated. Plans for further work on this program are outlined."
Date:
June 1, 1956
Creator:
Metals Research Department
Object Type:
Report
System:
The UNT Digital Library
Critical Mass and Neutron Flux Distribution
"Critical mass calculations for a reactor are given. The numerical calculations are shown for fission product poisoning, heavy element formation, temperature coefficient of reactivity and average neutron fiux distribution."
Date:
June 22, 1956
Creator:
Ford Instrument Company, Division of Sperry Road Corporation
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
The Armour Dust Fueled Reactor (ADFR)
"Work has begun on the ADFR, a reactor using a new fuel form -- fissionable dust carried in an inent gas. Temperatures in the range 2,000 to 3,000 deg F appear feasible in an all-ceramic system. Experimental study of the fuel form was initiated, and a loop to circulate the fuel dust was constructed. Initial operation is encouraging. Theoretical studies were carried on in the areas of reactor physics, heat transfer, and safety."
Date:
October 31, 1958
Creator:
Krucoff, D. & Loewe, W. E.
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
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
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
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
Technical Report No. 3
"Work towards the preparation of pure alkali halides is described. It was found that zone refining is an effective technique for the refinement of KCl. Four zone passed through one specimen of Harshaw KCl decreased its low- temperature conductivity by a factor of six. Kyropulos apparatus has been constructed to grow large single crystals in controlled atmospheres. It operates satisfactory in ambient atmospheres, but because of the high volatility of KCl at its melting point the viewing windows cannot be kept clear and large crystals have not been grown successfully in a controlled atmosphere. Only the simplest methods were used in attempting to prevent the deposition of KCl on the viewing and illuminating ports. In all other respects, the crystal growing apparatus is satisfactory. The last section of the report discusses the efforts made towards developing procedures of quantitative chemical analyses of the salts. Most effort has been directed at spectrochemical methods. The cathode layer technique was used to attain improved sensitivity but as yet a routine quantitative procedure has not been developed. A hollow cathode technique may improve both sensitivity and accuracy and work is being done along with the cathode layer method."
Date:
July 1958
Creator:
Anderson, Scott
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
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
Temperature and Phase Effects on the Photolysis of Ethyl Iodide
"The elementary steps in the photolysis of liquid ethyl iodide by light of wavelength 2537 A by determining initial rates of iodine production in the presence of added iodine and hydrogen iodide were analyzed at 25 and --70 d C to get information on the activation energies of competing elementary reactions. Investigations were also made of the effects of additives on the photolysis of glassy ethyl iodide at --180 d C, and evidence for the formation of trapped radicals during photolysis and radiolysis of the solid was sought by electron paramagnetic resonance measurements."
Date:
January 1, 1958
Creator:
Luebbe, Ray H. Jr. & Willard, John E.
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
Progress Report No. XXIII
"Progress is briefly reported on studies in dielectric spectroscopy, magnetic resonance, high-field-strength research, ferroelectrics and ferromagnetics, semiconductors, single crystals, and ceramics."
Date:
June 1, 1958
Creator:
Laboratory for Insulation Research, Massachusetts Institute of Technology
Object Type:
Report
System:
The UNT Digital Library
Upper Atmosphere Monitoring Program
"An apparatus designed to test aerosol filter efficiency at pressures equal to or less than atmospheric and at linear face velocities of 5 to 1000 ft/ min is described. Aerosol collection efficiency studies were completed for IPC paper at 20,000 and 40,000 ft. Data developed in these studies indicate that ia the impaction and diffusion regions collection efficiency increases with altitude for all linear face velocities less than 800 ft/min. A propeller-type flowmeter, calibrated to measure the volume of air moved by a blower in a balloon-borne system, was flown on five separate flights to obtain air flow data. These data sre presented. Flowmeter air flow measurement data were approximately 10% lower than telemetered data."
Date:
June 13, 1958
Creator:
Stern, Sidney; Jones, Sam; Schekman, Al & Stuart, Robley
Object Type:
Report
System:
The UNT Digital Library
Resin Attrition
"Uranium metal is produced by the bomb reduction of UF/sub 4/ with Mg. The slag from this reduction contains appreciable quantities of U, either in the metallic or the tetrafluoride form, in addition to the MgF/sub 2/. A process for recovering low enrichment U from this slag has gone into operation. A study of the causes of resin attrition and their relative magnitude both from an over-all point of view and with specific reference to the Higgins' Column and Dowex 21K resin is presented. Equipment was designed, assembled, and tested to investigate the effects of valve action, wall to resin and resin to resin friction, repeated chemical cycling, and column height. Certain mechanical properties of the resin beads were investigated, and some existing plant data were analyzed. A discussion of the probable mechanism of attrition and its contribution to the overall amount of attrition is presented."
Date:
April 9, 1958
Creator:
Seiler, G. R.; Ammann, P. R. & Newey, A. B.
Object Type:
Report
System:
The UNT Digital Library
The Sodium-Cooled, D2O-Moderated Rector (SDR)
"For presentation at the 1958 Nuclear Congress, Nuclear Science and Engineering Conference, March 17The experimental program was focused on the problems of containing the Na, of providing a barrier material with low neutron absorption cross section and an ability to withstand the action of hot Na, of developing an arrangement of this material which is mechanically adequate, and of demonstrating that an integrated barrier system can be safety operated under reactor temperature and pressure conditions. Possible barrier materials were subjected to hot Na jets. Stainless steel, Zr, and Al withstood the jet very well- The experimental arrangements of other tests are shown."
Date:
January 1, 1958
Creator:
Goldmann, Kurt & Leeper, Charles K.
Object Type:
Report
System:
The UNT Digital Library
Final Stress Analysis of FHR Seed I Core I
"The structural analysis of the PWR Core 1 Seed 1 under prescribed thermal and mechanical loading with the object of predicting the structural reliability of the seed during actual service is described. Static and fatigue tests performed on fusion-welded Zircaloy specimens are described, and the results of these tests are incorporated in the reliability study. The applied stresses in the seed during operation of the reactor are quite low except at the end welds. Here, based upon the test data, a safely factor of about 4 1/2 appears to exist for 6000 cycles of loading."
Date:
October 1957
Creator:
Mark, R.
Object Type:
Report
System:
The UNT Digital Library
Annual Report ONR Project A-2049
"The objective of this program is to conduct a broad basic program of analytical and experimental research into the fundamental behavior of gas- lubricated bearings and to establish general design criteria for these bearings. The work to date has included both theoretical and experimental phases of hydrodynamic and hydrostatic lubrication phenomena, supplemented by a digital computer program."
Date:
July 15, 1958
Creator:
Fuller, Dudley D.
Object Type:
Report
System:
The UNT Digital Library
The Influence of the Molecular Mean Free Path on the Performance of Hydrodynamic Gas Lubricated Bearings
"A modified Reynolds equation is derived for gaslubricated hydrodynamic bearings operating under ''slip flow'' conditions. Closed analytical solutions are given for a Rayleigh-type step-bearing and an inclined plane slider bearing for the case of two-dimensional flow. The influence of the molecular mean free path on the performance of bearings of arbitrary form is obtained by means of a small parameter, perturbation technique"
Date:
June 1956
Creator:
Burgdorfer, Albert
Object Type:
Report
System:
The UNT Digital Library