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Measurements of Mechanical Properties of Pure and Uranium-Loaded Graphites at Elevated Temperatures. Final Report for June 27, 1957 Through December 15, 1958

Description: Various mechanical-property measurements on several grades of manufactured (polycrystalline) graphite stock include tensile-strength determinatftons at temperatures from 20 to 2400 deg C (plus a few at 2500 deg C), tensile stress-strain and creep tests in the range 2000 to 2400 deg C, torsional strength and stress-strain measurements from 20 to 2600 deg C, torsional creep and stress-relaxation tests in the range from 2000 to 2500 deg C, dynamic Young's- modulus determinations from 20 to 2450 de… more
Date: December 23, 1958
Creator: Green, L., Jr.; Stehsel, M.L. & Waller, C.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Progress in the Development of a Process for Producing UO$sub 2$ Pellets

Description: Progress in the development of manufacturing procedures and techniques for uranium dioxide fuel pellets is described. Specifications for both the uranium oxide powder and the final fuel pellet are given. A process is described for making pellets wlth closely controlled density, dimensions, purity, and freedom from structural defects from ADU (ammonium diurante process) uranium dioxide powder. A formula relating lineaashrinkage to green and fired densitles has been derived, This formula has prov… more
Date: December 1, 1958
Creator: Winchell, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Corrosion of AISI Type 304 Stainless Steel in High Temperature Borated Water

Description: BS>The corrosion of type 304 stainless steel in water containing boric acid at 600 deg F and 2000 psig and at a flowvelocity of seven feet per second was investigated as a function of boron concentration and of alkaliknity. At a boron concentration of 39 ppm and at a pH value of 10, controlled with lithium hydroxide, no trend of corrosive attack with time was found after the first tw0 days. At a concentration of 41 ppm boron wlth no pH control (pH = 6.9), a regression tyoe equation of the form … more
Date: December 1, 1958
Creator: Krieg, A. & Cytron, S. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Studies of the Corrosion of Aisi 304 Stainless Steel and Aisi 4135 Carbon Steel Exposed to Saturated Solutions of Boric Acid

Description: AISI 304 stainless steel and AISI 4135 carbon steel specimens were exposed to five wt.% (70 F) and thirteen wt.% (140 F) boric acid solutions. These are essentially saturation concentrations. After four weeks exposure it was found that the AISI 304 stainless steel was not attacked under these conditions but that the carbon steel had developed considerable corrosion products in the form of scale. It was found that the attack on carbon steel at 70 F in a five wt.% boric acid solution was greatly … more
Date: November 1, 1958
Creator: Bergen, C. R. & Whyte, D. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Laboratory Evaluation of Graphite Crucible Coatings for Vacuum Melting Uranium

Description: Oxide and carbide coatings and methods of applying them to graphite crucibles were evaluated on a laboratory scale. The objectives were to find a better crucible and mold coating than magnesia (Mgo), which is currently used in the remelt operation, and a better method of application than brushing. The evaluation consisted of the vacuum-melting of slug uranium charges and derby having different coatings, followed by studies of the appearance of the coatings and the metal quality (impurity levels… more
Date: October 24, 1958
Creator: Magoteaux, O. R.; Elston, D. L. & Hall, C. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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CONTRIBUTION OF THE JOMINY-TYPE END QUENCH TO METALLOGRAPHIC PHASE IDENTIFICATION IN URANIUM

Description: The identification of phases and interpretation of phase transformation through microstructural analysis are still difficult even with metallographic standards as a guide. Macrostructures provide a better guide to determination of the origin of the quenched phase and the degree of quenching. Grain sizes are of some assistance in determining the cooling conditions employed. Twinning concentration and grain boundry shape are inconclusive characteristrcs to use in determining the origin of the que… more
Date: December 1, 1958
Creator: Lewis, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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THE THERMAL CONDUCTIVITY OF A MOLTEN Pu-Fe EUTECTIC (9.5 a/3 Fe)

Description: The thermal couductivity of the Pu-- Fe eutectic mixture (9.5 at.% Fe) was measured in both the solid and liquid states by the use of a guarded cylinder apparatus which operated in a high vacuum. The apparatus was designed as an absolute measuring devlce and was checked with a known material. The thermal conductivity values obtained varled from 0.034 at 220 C to 0.0412 at 400 C in the solid state and from 0.045 at 420 C to 0.045 at 520 C in the molten state, with the units of cm sec C. The curv… more
Date: July 1, 1958
Creator: Deverall, J. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Quarterly Report of the Solution Materials Section for the Period Ending October 31, 1958

Description: A simulated HRT fuel solution was unstable when passed through a heated Zircaloy-2 bypass section installed on a Ti loop. Losses of uranyl, cupric, and nickel sulfates were observed when the temperature of the solution emerging from the bypass was as low as 290 deg C. The 0.04 m UO/sub 2/SO/sub 4/ solutions containing Please delete abstract number 7731
Date: October 31, 1959
Creator: Griess, J. C.; Savage, H. C.; Greeley, R. S.; English, J. L.; Bolt, S. E.; Hess, D. N. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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EFFECT OF TRANSFER TIME ON THE RECRYSTALLIZATION BEHAVIOR OF BETA-COOLED URANIUM

Description: A study was made of the recrystallization behavior of beta-quenched uranium by incorporating the effects of transfer time from the beta heat-treating bath to the quench media. A critical transfer lime which relates to the time required to immerse samples at a temperature above the beta-alpha transformation in a quench media directly affects the beta-cooled structure and its ease of recrystallization upon alpha phase annealing. Within the critical transfer time, the ease of recrystallization and… more
Date: January 12, 1959
Creator: Carloni, Q. C. & Lewis, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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PROGRESS ON THE USE OF GAS-PRESSURE BONDING FOR FABRICATING LOW-COST CERAMIC, CERMET, AND DISPERSION FUELS

Description: Basic properties of several types and grades of commercial UO/sub 2/ have been determined. Compacting characteristics of these powders were evaluated with the objective of obtaining a minimum cold-pressed density of 70% of theoretical prior to gas-pressure bonding. Fused and special dense grades of UO/ sub 2/ powders were compacted to a density of 85% of theoretical by use of a 50- tsi compacting pressure. Cold-pressed compacts were simultaneously clad and densified to a maximum he UO/sub 2/ po… more
Date: August 25, 1959
Creator: Paprocki, S.J. ed.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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THE PREPARATION AND PROPERTIES OF THREE REFRACTORY BERYLLIDES

Description: The beryllium compounds NbBe/sub 12/, YBe/sub 13/, and ZrBe/sub 12/ were prepared by arc melting. Some beryllium was lost in this operation but sound ingots were obtained. The hardness, density, metallographic structure, x-ray structure, and oxidation resistance in air of each ingot were determined. The zirconium compound apparently had a tetragonal structure corresponding to ZrBe/ sub 12/ and a hardness of 790 Knoop and a density of 2.94 g per cm/sup 3/. The yttrium compound had a cubic struct… more
Date: March 1, 1959
Creator: Chubb, W. & Dickerson, R.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pickling of the Zircaloys Prior to Corrosion Exposure

Description: A series of investigations relative to the pickllng of the Zircaloys prior to corrosion exposure ig described. The feasibility of utilizing common ion neutralization, and sulfuric acid rinses subsequent to pickling to facilitate surface cleaning and minimize acid entrapment was inveatigated. Investigations of various addition agents to the aqueous nitric acid-hydrofluoric acid pickling solutions were made to evaluate pickling rates, surface smoothness, cage in rinsing, and effects upon subseque… more
Date: September 1, 1958
Creator: Kass, S.; Fontanese, D.J.; Oaks, A.E. & Scott, D.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Low Cross-Section Iron-Base Alloys

Description: Data are presented on the mechanical properties of iron-silicon and iron- aluminum alloys in the range 0 to 14% Si and about 8% aluminum. The effect of third elements on ductility is discussed, and data are prcsented which indicate that it is not possible to obtain a disordered structure in Fe--Si a1loys from 8 to 14% Si. It is concluded that alloys of iron with 6 to 8% aluminum offer a promising base composition for development of low neutron cross section alloys for use in nuclear reactors. (… more
Date: July 1, 1957
Creator: Lillie, D.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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HYDROSTATIC JOURNAL BEARING WATER TESTS CONDUCTED IN MODIFIED PK-A PUMP

Description: A hydrostatic journal bearing mounted near the impeller of an overhung vertical shaft centrifugal pump was subjected to water testing as a part of the molten salt lubrication investigation at ORNL. Three tests were performed with bearings having radial clearances of 0.003 in., 0.0075 in., and 0.005 in. The first journal and bearing (0.003 in. radial clearance) were found to be heavily scored after testing. Only faint localized scratches were found on tho second journal (0.0075 in. radial cleara… more
Date: February 1, 1959
Creator: Gilkey, H. E. & Smith, P. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Casting of a Uranium Shield for a Kilocurie Cobalt-60 Source

Description: Casting a U shield for a kilocurie Co/sup 60/ source is described. The melting equipment is described, and data on the castings are tabulated. Examination of the casting revealed no large blow holes or cracks, and the method was considered adequate. (J.R.D.)
Date: August 1, 1959
Creator: Dunworth, R. J. & Macherey, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Testing of Potential Bearing Materials in an Argon Atmosphere of Low Humidity

Description: Bearing materials for use in the Metallurgy Division Sector of the EBR- 11 Fuel Cycle Plant must operate without lubrication in an argon atmosphere of low humidity (dew-point of --50 deg C or less) and high gamma activity. To select suitable materials, a test program, in which samples of materials known to be radiation resistant were tested for wear resistance in an argon atmosphere containing less than 30 ppm water by volume, was initiated. The criterion by which wear resistance was judged is … more
Date: August 1, 1959
Creator: Carson, N. J., Jr. & Morris, W. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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APPLICATION OF ELECTROLESS-NICKEL BRAZING TO TUBULAR FUEL ELEMENTS FOR THE N.S. SAVANNAH. Status Report

Description: The feasibility of using electroless nickel, a chemical deposit containing about 10 wt.% phosphorous in nickel, as the brazing alloy for assembling tubular stainless steel fuel elements of the type specified in Core I of the N. S. Savannah was investigated. This material was selected primarily because of the ease of braze-metal preplacement by chemical deposition of the alloy on type 304 stainiess steel ferrule spacers, prior to fuelbundle assembly. Brazed joints produced by this method were ge… more
Date: June 1, 1959
Creator: Lamartine, J T & Thurber, W C
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ELECTRON MICROSCOPICAL EXAMINATION OF BONDS IN ZIRCALOY-2

Description: Electron microscopy was used to supplement metallographic studies of bonds between Zircaloy-2 interfaces. Treated surfaces before bonding, and bonded sections made by a variety of techniques were examined. Electron micrographs of belt-abraded surfaces exhibited a consistent fine-scale roughness. Chemically pickled surfaces were nearly smooth regardless of prior treatment. Chemically pickled samples and a zirconium oxide-coated sample pressure bonded at 1500 F and 10,000 psi had pitting at bond … more
Date: July 29, 1959
Creator: Young, A.P. & Schwartz, C.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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HIGH TEMPERATURE PROPERTIES OF URANIUM AND ITS ALLOYS

Description: Data are presented on the mechanical and physical properties of high- purity and normal uranium and for a range of dilute uranium alloys at temperatures up to 700 deg C. The results of thermal conductivity and thermal expansion determinations for a range of alloys are discussed, and some results on the latent heat of fusion and volume change on melting are presented. Results of dilute alloy creep tests are reported and correlated with thermal cycling data and resistence to swelling under irradi… more
Date: October 31, 1959
Creator: McIntosh, A.B. & Heal, T.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Influence of Radiation Upon Corrosion and Surface Reactions of Metals and Alloys

Description: A discussion of various factors in corrosion of irradiated metallic surfaces is presented. The usual mechanisms of metallic corrosion, such as direct chemi-cal reactions, direct solution (mass transfer), and electrochemical mechanisms, are considered in relation to the effects of light and x rays. In addition, corrosion of reactor materials in aqueous materials is considered. The effect of irradiation on gas -solid reactions is discussed as well as proton irradiation effects on surface reaction… more
Date: January 1, 1957
Creator: Simnad, M. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ALUMINA-CLAD UO$sub 2$ FOR FUEL APPLICATIONS

Description: Using a special reactive form of high-purity alumina, claddings were applied to UO/sub 2/ particles by a tumbling technique. The clad pellets were isostatically pressed at 100,000 psi and then sintered at 2800 deg F in hydrogen. crack-free spheroidal pellets ranging from 1000 to 2000 mu in diameter were produced. The dense Al/sub 2/O/sub 3/ envelopes surrounding the UO/sub 2/ particles were estimated to be 300 to 500 mu thick. The Al/sub 2/O/sub 3/ claddings protected the UO/sub 2/ from oxidati… more
Date: February 18, 1959
Creator: Smalley, A.K.; Riley, W.C. & Duckworth, W.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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EXAMINATION OF CORE ACCESS FLANGE SPECIMEN AND SCALES FROM HRE-2 AFTER RUN 16

Description: Observations, weight data, and chemical analyses of scales on the core access flange and attached specimen assembly exposed in HRE-2 during reactor runs 15 and 16 are reported. The stheinless steel specimen showed a very small weight loss. All surfaces exposed to the reactor solution were covered with an unusual two-layer scale. (auth)
Date: October 28, 1958
Creator: Olsen, A.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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