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Chemical Technology Division, Chemical Development Section C Progress Report for October-December 1961

Description: Recovery of Th (and U) from Granitic Rock. Recovery of Th by acid leaching ten addltlonal granite samples (36 to 82 ppm Th) from the Conway formation in N. H. ranged from about 50 to 85%, and averaged about 70%, Study of the effect of grind size on the recovery of Th from Conway and Plkes Peak granites showed no significant differences in the range minus 20 to minus 200 mesh. The Th concentration in a sized Conway granite sample was found to be much greater in the fine than in the coarse fracti… more
Date: February 21, 1962
Creator: Brown, K.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of Irradiation hardening of Unalloyed and ODS molybdenum during neurtron irradiation to low doses at 300C and 600C

Description: Unalloyed molybdenum and Oxide Dispersion Strengthened (ODS) molybdenum were irradiated at 300 C and 600 C in the high flux isotope reactor (HFIR) to neutron fluences of 0.2, 2.1, and 24.3 x 10{sup 24} n/m{sup 2} (E > 0.1 MeV), producing damage levels of 0.01, 0.1 and 1.3 Mo-dpa. Hardness measurements, electrical resistivity measurements, tensile testing, and Transmission Electron Microscopy (TEM) were used to assess the defect structure. Irradiation hardening was evident even at a damage le… more
Date: November 21, 2007
Creator: Cockeran, B. V. & Smith, R. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Segregation effects in JBK-75

Description: Chemical segregation of alloying elements, can be a severe problem in complex alloys. Many problems have been experienced with developing fabrication processes for JBK-75 and it is suggested that these difficulties may be related in part to the degree of chemical heterogeneity that exists in the alloy. Early testing and qualification of the alloy was made on relatively homogeneous samples, which came from small diameter ingots. In large size ingots used for production, it is more difficult to a… more
Date: December 21, 1979
Creator: Mataya, M. C.; Edstrom, C. M.; Krenzer, R. W. & Doyle, J. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Examination of the Effects of Be Grain Size

Description: During the WBS4 review almost a year ago in January, and in more recent discussions of needed capsule characterization, I was struck by three pieces of information related to machined Be capsules: (1) that the speed of sound (and perhaps other properties) in Be grains is markedly different in orthogonal directions, (2) that the grain size in the best refined bulk Be samples is 10 to 15 {micro}m, and that these grains in the best case are randomly oriented, and (3) that we are concerned about ca… more
Date: November 21, 2000
Creator: Cook, R
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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QA/QC requirements for physical properties sampling and analysis

Description: This report presents results of an assessment of the available information concerning US Environmental Protection Agency (EPA) quality assurance/quality control (QA/QC) requirements and guidance applicable to sampling, handling, and analyzing physical parameter samples at Comprehensive Environmental Restoration, Compensation, and Liability Act (CERCLA) investigation sites. Geotechnical testing laboratories measure the following physical properties of soil and sediment samples collected during C… more
Date: July 21, 1993
Creator: Innis, B. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mound Laboratory isotopic power fuels programs: July--September 1973

Description: Progress in the isotopes fuel program during July to Oct 1973 is reported. Preparation and fuel characterization studies of /sup 238/Pu fuels continued. The effect of lower pressing temperatures on pressed plutonium oxide (PPO) spheres was evaluated. Plutonium-238 dioxide feed material that was sintered to a maximum of only 900 deg C was pressed under otherwise normal conditions into a Multihundred Watt (MHW) type fuel sphere. This pressing resulted in a sphere with near-perfect surface texture… more
Date: November 21, 1973
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pressure Induced Phase Transformation of Pb(Zr(0.95)Ti(0.05))O(3) Based Ceramics: Grain Size Dependence

Description: A substantial decrease in hydrostatic ferroelectric (FE) to antiferroelectric (AFE) transformation pressure was measured for Pb(Zr{sub 0.949}Ti{sub 0.051}){sub 0.989}Nb{sub 0.0182}O{sub 3} ceramics with decreasing grain size. The 150 MPa decrease in hydrostatic FE to AFE transformation pressure over the grain size range of 8.5 {micro}m to 0.7{micro}m was shown to be consistent with enhanced internal stress with decreasing grain size. Further, the Curie Point decreased and the dielectric constan… more
Date: December 21, 1999
Creator: Tuttle, Bruce A.; Voigt, James A.; Scofield, Timothy W.; Aselage, Terrence L.; Rodriguez, Mark A.; Yang, Pin et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Particulates Generated During the Air Oxidation of Uranium

Description: The effect of temperature on the nature of oxide formed from uranium oxidizing in air is pronounced, there being an increase in particle size wtth increasing temperatare over the range 400 to 800 deg C. At 1000 deg C and above the oxide formed remains largely intact, giving rise to few-micron size particles during the heating period. In relating these facts to fission product release, it would be anticipated that the effect of air velocity on the release of fission products would be more pronou… more
Date: August 21, 1962
Creator: Coleman, L. F. & Schwendiman, L. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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CHARACTERIZATION OF UO$sub 2$ POWDERS. Quarterly Report No. 5, October 10, 1961 to January 10, 1962

Description: The particle size distribution of UO/sub 2/ powders gave good eorrelation with the sintered density of pellets. The method involves gravity sedimentation techniques. The green pressing step of pellet fabrication was found to affect the particle size distribution of the UO/sub 2/ powders. The magnitude of this effect is considered in characterization of the pressed powders. (J.R.D.)
Date: March 21, 1962
Creator: Carpenter, J.F.; Kuhlman, C.W. & Nelson, R.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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SOME EXPERIMENTS ON THE ACCURACY OF THORIA SLURRY SAMPLES

Description: Tests were performed on a thoria slurry flowing in a pipe to determine the magnitude of the possible error involved in the sampling process. Evidence indicates that a correct sample is obtained by withdrawing the sample isokinetically (i.e., by facing the sampler into the flow and adjusting the sampler velocity to match the ambient velocity) provided that the sampler is larger than some minimura diameter that is dependent on the mean eddy length and/ or the mean particle size. (auth)
Date: April 21, 1960
Creator: Wichner, R. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Modeling and Simulation - The Effects of Grain Coarsening on Local Stresses and Strains in Solder Microstructure

Description: A critical issue in the long-term reliability of solder connections used in electronic packages is the joint failure during thermal cycling. Presently in most finite element analysis to predict the solder joint fatigue failures, solder is assumed as a homogeneous single-phase metal. However in the last decade, several metallurgical studies have shown that solder microstructure may have a role in early solder joint failures (ref 1). Investigators have observed (ref 1) that solder microstructure … more
Date: January 21, 1999
Creator: Chanchani, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Evaluation of Stainless Steels for Primary Surface Recuperator Applications

Description: In 1996, a Cooperative Research and Development Agreement (CRADA) was undertaken between the Oak Ridge National Laboratory (ORNL) and Solar Turbines Incorporated to develop improved stainless steels for gas turbine recuperator applications. A team was assembled that consisted of materials and fabrication specialists from ORNL, Solar Turbines, Allegheny Ludlum Research Laboratory, and the University of California-San Diego. The development strategy was to (1) identify the materials performance r… more
Date: February 21, 2001
Creator: Swindeman, R.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effect of Hydrogen on Work Hardening of Type 304L Austenitic Stainless Steel

Description: The grain size and strain dependence of work hardening in Type 304L stainless steel were analyzed between 200 and 250 K where hydrogen damage is greatest. Tensile data were obtained for specimens of several grain sizes, both with and without prior exposure to hydrogen gas at 69 MPa pressure. The analysis suggests that hydrogen has little influence on lattice friction stress but has a large effect on dislocation interaction and the back stress of dislocation pileups. This report discusses this s… more
Date: May 21, 1981
Creator: Caskey, G. R., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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