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Calculation of the Temperature Distribution in a Slug With a Solid Aluminum Cap

Description: Calculations were made to determine the temperature at various points of a thick disc and cap, on the assumptions that the heat production rate is uniform throughout the slug and that the slug is in perfect thermal contact with the cap. Results obtained by different methods of computation are compared with each other and with results obtained by Drew on the Paschkis electrical network computer at Columbia University.
Date: April 14, 1944
Creator: Murray, F. H.; Karush, William; Ginsburg, M. & Young, G.
Partner: UNT Libraries Government Documents Department
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The Influence of Operation on Tuballoy

Description: An attempt is made to estimate the influence of operation upon the mechanical properties of tubealloy. It is to be emphasized that the work is highly speculative, being base upon a set of judicious assumptions regarding the transport material within the metal and should not be used as a substitute for a set of well-planned experiments. The two principal effects considered are the hardening which results from the atomic displacement produced by the fission fragments and the changes in mechanical… more
Date: April 21, 1944
Creator: Seitz, Frederick, 1911-2008
Partner: UNT Libraries Government Documents Department
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On the Boundary Condition Between Two Multiplying Media

Description: The transition region between two parts of a pile which have different compositions is investigated. In the case where the moderator is the same in both parts of the pile, it is found that the diffusion constant times thermal neutron density plus diffusion constant times fast neutron density satisfied the use pile equations everywhere, right to the boundary. More complicated formulae apply in a more general case.
Date: April 19, 1944
Creator: Friedman, Francis L. (Francis Lee), 1918- & Wigner, Eugene Paul, 1902-1995
Partner: UNT Libraries Government Documents Department
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Thermal Stresses Arising from Defective Strip in Bond

Description: Stresses set up by an insulating strip in the bond are estimated and found to be small compared to those normally present without the defect.
Date: May 18, 1944
Creator: Young, G.
Partner: UNT Libraries Government Documents Department
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The Diffusion Length of Thermal Neutrons in Uranium

Description: Measurements made in a uranium cylinder result in a mean value of 1.55 cm. for the diffusion length L for distances of 1 to 4 cm. from the base of the cylinder. Calculations give a value which agrees with the experimental result and show further that L increases from 1.40 to 1.63 cm. as the neutrons diffuse a distance of 5 cm. into the uranium.
Date: May 27, 1944
Creator: Hughes, Donald James, 1915-1960 & Bragdon, E. W.
Partner: UNT Libraries Government Documents Department
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A Case of Rod Warping

Description: Warping of a rod by a variation in heat transfer coefficient around the periphery is considered. Estimates for some simple cases are given, and a more precise numerical calculation is carried out in ne instance.
Date: May 27, 1944
Creator: Murray, F. & Young, Gale Jay
Partner: UNT Libraries Government Documents Department
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Jacket Temperature Near End of Slug

Description: Some situations which give rise to a hot ring around the slug near the end are considered; namely rounded slug ends in the long cartridge design, and the Wilkins effect in the current unbonded short slug design.
Date: June 23, 1944
Creator: Young, Gale Jay
Partner: UNT Libraries Government Documents Department
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Extrusion of Compound Tubes of Aluminum and B4C

Description: Various experimenters have shown (H.H. Gersman U.S. Patent 2,335,590, Nov. 30, 1943; Aluminum Co. of America, various technical papers; also CT-482) that when a billet is extruded by proper technique into a rod (or tube by a floating mandril) that flow of material is streamline and and the extruded article is essentially a space replica of the billet, with linearly distorted coordinates. Advantage is taken of this fact in the manufacture of alclad tubing in which a billet containing an inner co… more
Date: July 1, 1944
Creator: Creutz, E. C.
Partner: UNT Libraries Government Documents Department
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Temperature and Heat Flow in a Graphite Electrode

Description: In making various experimental heat studies a power producing metal slug is simulated by a slug with a graphite rod electrode of 3/8" diameter inserted lengthwise through it. There is a helium filled annular space between the graphite and the inner surface of the slug cylinder. Radiant heat passes from the electrode to the metal; with proper adjustment of the electrode current the slug in the steady state will therefor "produce" the same amount of energy from its exterior surface as it would un… more
Date: August 3, 1944
Creator: Schlegel, R.
Partner: UNT Libraries Government Documents Department
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Progress Report : Low Geometry Alpha Particle Ionization Chambers

Description: ABSTRACT. When solutions of high specific alpha activity are to be assayed for product, it is often difficult to obtain reproducible results by diluting the solution sufficiently to remove a small volume from which a sample can be prepared and counted at 52% geometry. In order to assay such a solution, most reproducible results have been obtained with minimum effort in sample preparation by making use of low geometry chambers. Two types of low geometry chambers are described: 1) The air-screen … more
Date: November 8, 1944
Creator: Borokowski, C. J.; East, J. K. & Flatau, C.
Partner: UNT Libraries Government Documents Department
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Further End Cap Temperature Calculations

Description: Abstract. Recently (CP-1989) it has been shown that the neutron density, and thus the heat production, at the end of a slug with an A1 cap may be appreciably higher than that at the middle of the slag. A re-examination of earlier temperature calculations is made in light of this effect.
Date: August 16, 1944
Creator: Karush, William; Monk, A. T. & Wilkins, J. Ernest, Jr., 1923-2011
Partner: UNT Libraries Government Documents Department
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Flexibility of a Tube in Which Slugs Slide

Description: An approximate calculation is made of the variations of the flexibility of a long cartridge with the length of the slug used, assuming that the jacket slides without friction.
Date: September 13, 1944
Creator: Young, G.
Partner: UNT Libraries Government Documents Department
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A Sensitive Particle Ionization Chamber for Neutron Detection

Description: Abstract. A particle ionization chamber of sensitivity sufficient to detect a source of one neutron per second has been used to measure the neutron yield from a thick target of sulfur upon bombardment with polonium alpha particles. The high-geometry boron trifluoride chamber used had an efficiency of 1.9 percent for fission neutrons. The neutron yield from a thick target of sulfur was measured by this instrument and found to be .0035 +- .0013 neutrons per million incident polonium alpha particl… more
Date: November 21, 1944
Creator: Sturm, William J. & Dabbs, John
Partner: UNT Libraries Government Documents Department
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Passage of a Rod Around a Corner

Description: Maximum curvatures and forces set up in taking a rod in a tube are considered.
Date: October 20, 1944
Creator: Martin, A. V. & Young, G.
Partner: UNT Libraries Government Documents Department
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Maximum Force of a Warped Rod Against a Rigid Constraint

Description: Abstract. Given the maximum intrinsic curvature of a rod, the maximum force required to confine it between parallel rigid walls is computed.
Date: October 26, 1944
Creator: Martin, A. V.
Partner: UNT Libraries Government Documents Department
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Thermal Transfer to an Annular Water Stream in the Neighborhood of a Rib

Description: Abstract. Steady-state temperatures were measured in an electrically heated brass cylinder which was water cooled in a four-ribbed Al tube. Thermal transfer coefficients h were calculated from the measured temperatures. Curves of h values are presented for the regions of high and low ribs. the h curve is found to show a much sharper break in the region of high rib than in a low rib region. There is some evidence that h decreases linearly with annular thickness in the range considered. The low r… more
Date: November 10, 1944
Creator: Kratz, H. R.; Schlegel, R. & Christ, Carl F.
Partner: UNT Libraries Government Documents Department
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The Thermal Conductivity of Uranium

Description: Abstract. The thermal conductivity of uranium as a function of temperature is measured by comparing its conductivity with that of a sample of brass. An absolute measurement is then made of the conductivity of the brass sample. The thermal conductivities as a function of temperature of two samples of extruded uranium rod are given.
Date: December 18, 1944
Creator: Kratz, H. R. & Raeth, C. H.
Partner: UNT Libraries Government Documents Department
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H-Metal Lined Sphere

Description: The problem of lining a hollow aluminum sphere, 10 inches i.d., with lunes of heavy metal foil, was assigned to this group by Dr. E. Creutz. The work was carried out under the direct supervision of Dr. D.H. Gurinsky. the problem was divided naturally into tow parts: first, forming fitting the lunes, and second, cementing hem to the inside of the sphere.
Date: October 10, 1944
Creator: Young, Dwight S.
Partner: UNT Libraries Government Documents Department
open access

Temperatures on the Surface of a Slug Jacket

Description: Prior to operating a chain reacting, graphite moderated, water cooled uranium pile at Hanford, the corrosive action of water on uranium was studied. It was necessary to enclose the uranium cylinders in Al jackets. Preliminary data were available which indicated Al jacket corrosion might be influenced by the water temperature. Therefore, in order to specify safe operating conditions, it was desirable to know the temperature at any position on the Al jacket of a slug in the tube. Because of the e… more
Date: November 1, 1944
Creator: Monet, M.
Partner: UNT Libraries Government Documents Department
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Fission Product Poisoning in a Pile

Description: Abstract. The effect of the neutron flux on the relative importance of different fission product poisons is discussed. The general expression for the poising of a fission product is given with the various equations for special cases of interest. The formulae are applied to the problem of finding the poisoning due to fission products at the end of one day in a pile operating with a flux of 4 x 10(14) neutrons/cm(2)/soc. These results are summarized in the table on page 12. Appendix I contains a … more
Date: December 15, 1944
Creator: Way, Katharine, 1903-
Partner: UNT Libraries Government Documents Department
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Estimates of the Maximum Surface Temperature for a Slug Displaced from the Center of the Tube

Description: When a slug has been displaced from its normal position the thickness of the water film is decreased over part of the surface, and higher temperatures may be expected where the film is thin. The experimental data necessary for an exact calculation is incomplete, but some approximate estimates ae made here with special assumption concerning the heat transfer coefficient h as a function of the angle p from the point where the water film is thinnest. Variation in water bulk temperature around the … more
Date: January 9, 1945
Creator: Murray, F. H.
Partner: UNT Libraries Government Documents Department
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Pile Heat Exchanger Calculations

Description: Abstract. Some idealized calculations (CP-807) relating to the design of heat exchangers for minimum holdup of pile liquid are presented in compact form to facilitate quick estimates. Their use is illustrated by application to a falling film type exchanger.
Date: February 14, 1945
Creator: Young, Gale Jay
Partner: UNT Libraries Government Documents Department
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