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A Two-Group, Three--Region, Fully Reflected Cylindrical Reactor Program for the IBM 1620
This program was prepared as a pilot program for a larger computer and handles symmetrical reactors with core, side reflector and end reflectors, using 10 radial and 10 axial mesh regions. The output consists of the effective multiplication constant, the two flux distributions, and the fission source distribution. The extrapolated Liebmann process is used for the inner iterations.
Date:
December 1962
Creator:
Thompson, J. J. & Godfrey, M.
Object Type:
Report
System:
The UNT Digital Library
Two Modes of Pulse Recording on Magnetic Tape
Methods and equipment are described whereby electrical pulses are recorded on magnetic tape in two different ways, using a commercial, single-track type deck, The first method is used to record count rate information regarding regularly or randomly occurring pulses. Random count rates up to approximately 2,000 per second can be directly recorded without serious dead-time loss. By the addition of a simple, high-resolution scale-of-4, the input count rate can be increased to approximately 20,000 per second. By the other method information about relative pulse amplitude as well as count rate is recorded. The usable amplitude analogue output corresponds to an input range of at least 7 to 1, with linearity of approximately 1 1/2 per cent of maximum amplitude. Amplitude resolution of 2 to 3 per cent is obtained over the upper 70 per cent of the range. Transistorized circuitry is described which enables the output pulses of the tape recorder to be analyzed by a Radiation Counter Laboratories Inc. 256 channel scaler-analyzer.
Date:
December 1963
Creator:
Fookes, R. A.
Object Type:
Report
System:
The UNT Digital Library
Two-Phase Pressure Losses Quarterly Progress Report: Seventh Quarter, August 12, 1963 - November 11, 1963
Technical report describing that the pressure drop along an annular channel with dimensions D(1) = 0.375 inch; D(2) = 0.875 inch, L = 70 inches. Flow was vertical and upward, and only the internal surface was heated. Subcooled conditions existed at the inlet, with two-phase conditions at the exit. Groups of three radial spacer pins on 18-inch centers along the channel, held the inner surface concentric with the outer surface. The single phase loss coefficient for each spacer group is K(8) = 0.21. The single phase friction factor for the annual channel is given by f = 0.16 N(R)(-0.16). The two phase pressure drop increases as the quality increases for G [over] 10(6) = 0.5 ;b/hr ft(2). The effect of heat flux on the pressure drop is very is very slight over the range of fluxes tested (0.55 less than or equal to Q over 10(6).\ less than or equal to 0.8). The two-phase pressure drop gradient in the same annulus, with no heat addition is qualitatively the same as for a 1/4-inch by 1-3/4 inches rectangular channel but is quantitatively greater than for the rectangular channel.
Date:
December 2, 1963
Creator:
Janssen, E. (Engineer) & Kervinen, J. A.
Object Type:
Report
System:
The UNT Digital Library
Two-Phase Pressure Losses Third Quarterly Progress Report August 12-November 12, 1962
This is the third quarterly report on the work done under Contract AT(04-30-189, Project Agreement No.27, and covers the period August 12 to November 12, 1962.
Date:
December 12, 1962
Creator:
Janssen, E. (Engineer) & Kervinen, J. A.
Object Type:
Report
System:
The UNT Digital Library
Use of Convergent and Asymptotic Series for Computation of the Modified Bessel Function of the First Kind.
In the Communications of the ACM of April, 1960, p. 240, there appeared two Algol algorithms for the computation of In, the modified Bessel function of the first kind. One of these algorithms uses a convergent series and the other an asymptotic series. Their author, Dorothea S. Clarke, did not give any information with regard to which algorithm is more appropriate in a given situation (a given situation meaning the computation of In (x) for a definite pair of numbers n and x). Such information is necessary, however, if the algorithms are to be useful, particularly since the asymptotic series is in many cases not valid.
Date:
December 12, 1960
Creator:
Bumgarner, L. L.
Object Type:
Report
System:
The UNT Digital Library
The Use of Low Energy Radioactive Isotopes in The Examination of Paintings on Thin Supports
The importance of the examination of paper and textile supported art objects by means of low energy X-rays has been ably discussed in the preceding papers of this session. The apparatus used for such radiography, however, has tended to be both expensive and confined to laboratory use. A lack of mobility arises from the weight and size of X-ray apparatus and the fact that its installation frequently requires shielding and special electric power lines. An inexpensive radiographic apparatus that required no special installation or external power and is small and light enough to be easily portable should be quite useful.
Date:
December 24, 1963
Creator:
Sayre, E. V.
Object Type:
Report
System:
The UNT Digital Library
Use of the Boiler Neutron Source for Exponential Experiments
The following report deals with the application of the water boiler neutron source to the exponential experiments in an attempt to speed up lattice testing measurements.
Date:
December 11, 1952
Creator:
Davenport, D. E.
Object Type:
Report
System:
The UNT Digital Library
Use of Thermal Electromotive Forces to Product Magnetic Field in a Controlled Thermonuclear Reactor
The following report investigates the possible use of thermal emf's to produce the plasma-containing magnetic field in a thermonuclear reactor.
Date:
December 27, 1954
Creator:
Northrop, Theodore G.
Object Type:
Report
System:
The UNT Digital Library
The Valve-Actuated Pulse Column Design and Operation
The following report describes a countercurrent extraction column, which employs timed solenoid valves and pressurized feeds to provide a pulsing action to disperse the phases. This report further describes the 4-stage cycle of the column operation.
Date:
December 3, 1951
Creator:
Burger, L. L.
Object Type:
Report
System:
The UNT Digital Library
The Vanadium-Uranium Constitutional Diagram
Abstract: "Vanadium-uranium equilibrium studies were made on alloys prepared from high-purity vanadium and good biscuit uranium. No intermetallic phases occur in the system. Additions of vanadium lover the uranium melting point and transformations producing a eutectic at 1240 +/- 5 C and eutectoid reactions at 727 +/- 5 and 652 +/- 5 C. The maximum solubility of uranium in vanadium is about 4 atomic per cent (15 weight per cent)."
Date:
December 15, 1951
Creator:
Saller, Henry A. & Rough, Frank A.
Object Type:
Report
System:
The UNT Digital Library
Voltage Regulator for Electroplating Control
This report describes an instrument used for electrolytic separation. It was one of four instruments previous used and improved, yet lacked details until now. The instrument's design and operation is described herein.
Date:
December 23, 1946
Creator:
Rogers, Lockhard Burgess & Pickle, C. B.
Object Type:
Report
System:
The UNT Digital Library
The Weighting of Intensities
Technical report. From report : "The method of least squares refinement is based on the prediction of the theory of errors that, if the errors of the observed structure factors follow the Gaussian distribution, the most nearly correct atomic parameters will be those which result in the minimization of the residual R = Σi [√wi(|Fo| - |Fc|)i]2."
Date:
December 13, 1962
Creator:
Hershaft, Alex & Corbett, John D.
Object Type:
Report
System:
The UNT Digital Library
Welding Procedure Specification for Welding of Austenitic Stainless Steel to Carbon Steel by Shielded Metal-Arc Process
The following report describes the welding procedures for welding austenitic stainless steel to carbon steel through a shielded metal-arc process, including the safety precautions and post-production process.
Date:
December 11, 1954
Creator:
Seran, P.N.
Object Type:
Report
System:
The UNT Digital Library
Wet Fluoride Studies: Calcium Plutonium (IV) Fluoride
Laboratory studies have shown that the double salt, CaF2-PuF4, can be precipitated by rapid addition of hydro-fluoric acid to solutions containing 25 to 75 g Pu/1, caleium equimolar to plutonium, and 1 to 10 M HNO3. The precipitate, which is subsequently washed with water and dried to 300 degrees C in dehumidified, deoxygenated argon, can be reduced thermally by calcium to give high yields of plutonium metal.
Date:
December 22, 1953
Creator:
Branin, P. B.
Object Type:
Report
System:
The UNT Digital Library
X-ray Photometric Assay of Plutonium in Metal Castings
This following report discusses certain topics pertinent to the x-ray photometric method, such as the optimum size of sample and of sample concentration, the technique of measurement for high precision, the use of easily prepared uranium standards for future calibrations and corrections for extraneous substances, and it compares results obtained by both x-ray and chemical assays.
Date:
December 12, 1952
Creator:
Lambert, M. C.
Object Type:
Report
System:
The UNT Digital Library
Zircaloy Cladding Thickness Testers
Technical report. From Abstract : "A number of similar eddy current instruments were developed to measure the thickness of Zircaloy over uranium metal in the range of 5 to 25 mils, Zircaloy over UO2 in the range of 20 to 40 mils, and the wall thickness of Zircaloy tubes in the range of 20 to 40 mils. The instruments were designed for use with hand-held probes or with feeder-mounted probes to measure the inside and outside cladding thickness of tubular elements and the wall thickness of Zircaloy sheaths. The instruments have a sensitivity of 3 microamps per mil change in Zircaloy thickness and an accuracy of +/- mil."
Date:
December 1961
Creator:
Goodwin, Leslie E.
Object Type:
Report
System:
The UNT Digital Library
Zirflex Dissolution of the Annular Cladding of Simulated Power Fuel Elements
The current interest in a tube-in-tube type Zircaloy-2 clad UO2 fuel element for use in the power reactors provided the incentive for a study of the dissolution of cladding from an annular space. The objectives of the study were to compare the estimated rate of dissolution in the annuli with rates on fully exposed metal. Because of an interest from the design standpoint, heat balance data from the study are reported.
Date:
December 9, 1959
Creator:
Smith, P. W.
Object Type:
Report
System:
The UNT Digital Library