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Neutron Diffraction Study of High Temperature Annealed Beryllium Oxide

Description: 1. X-ray and neutron diffraction studies were caried out on the crystal lattice of beryllium oxide annealed at 2000 degrees. 2. It was determined that neutron diffraction data confirms X-ray conclusions of the positions of beryllium atom positions in the crystal lattice of beryllium oxide. 3. From neutron diffraction data the values of the temperature fact B + 0.92 and the Debye characteristic temperature theta = 602 +- 13 degrees K were found.
Date: 1962
Creator: Kuleshov, E. M. (Evgeniĭ Mitrofanovich); Saduhov, G. G.; Sokotova, Z. A. & Hogg, S.
Item Type: Refine your search to only Report
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Flow Resistance and Heat Transfer in Annuli with Roughened Inner Tubes

Description: Pressure drop and heat transfer in annular tubes have been measured. The surface of the inner tube was artificially roughened. The investigation covered a range of Reynolds numbers from 200 to 100,000. The maximum heat flux, directed from the inner tube to the fluid, was about 316 W/cm2 or 2.7 x 10(6) kcal/m(2) h. The heat transfer medium was water. The hydraulic diameter of the annular tube served as characteristic length in the dimensionless Reynolds and Nusselt number. The results of all exp… more
Date: 1961
Creator: Brauer, H. & Chillag, J. P.
Item Type: Refine your search to only Report
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Nuclear Applications for Graphite Impermeable to Gases and Liquids

Description: The possibilities of producing graphite impermeable to gases and liquids, and suitable for nuclear applications, are discussed. The physical properties of such graphites depend on the different sealing processes and starting materials developed especially for the purpose. In the development of reactor grade graphite, described in a previous article, Germany was well behind other countries. As far as the making of impermeable graphite is concerned, however, advanced processes for and experience … more
Date: 1961
Creator: Fitzer, Erich, 1921-; Vohler, Otto; Etzel, K. W. & Chillag, J. P.
Item Type: Refine your search to only Report
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The Interaction of Aqueous Be(NO3)2 Solutions With Some Organic Acids

Description: 1. A study was made of the interaction between beryllium ions (Be(NO3)2) and oxalic, malonic, succinic, lactic, citric, maleic, and salicylic acids by determining the H+ ion concentration. It was established that the degree of interaction between Be2+ ions and organic acids can be arranged in the following series: oxalate = malonate > salicylate > maleate + citrate > tartrate > succinate > lactate. 2. The inability of the Be2+ ion to form only slightly disassociated compounds in the reaction wi… more
Date: 1957
Creator: Tananaev, Ivan Vladimirovich, 1904-; Shcheglova, Evgenii︠a︡ & de Bruin, H. J.
Item Type: Refine your search to only Report
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Salicylic Acid as a Reagent for the Spectrophotometric Determination of Beryllium

Description: 1. The reaction between beryllium salts and salicylic acid was studied by the spectrophotometric method in the ultra violet portion of the spectrum. The optimum pH value for this process was found to be 9.0 to 9.5. 2. Two independent methods showed that beryllium and salicylic acid form a compound in the ration 1:2. The instability constant was determined for the a complex of the formula (Be OH Sal2)3- names (4.9 +- 0.6) x 10-18. 3. The stability of the complex and the availability of the reag… more
Date: 1961
Creator: Adamovich, L. P. & de Bruin, H. J.
Item Type: Refine your search to only Report
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Determination of Stability Constants in Stepwise Complex Formation

Description: It has been shown by studying the possibilities for determining the constants in stepwise complex formation by the interaction of hydrolyzed metal ions and ligands, that in a vast number of cases the direct measurements of metal ion and ligand activities ae necessary. Complete formulae for calculation are given and the conditions which allow some simplifications are established.
Date: 1961
Creator: Komar, N. P. & de Bruin, H. J.
Item Type: Refine your search to only Report
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Some Separations of Radioisotopes Using Ethylenediaminetetraacetic Acid

Description: EDTA is an eluant with many possibilities for analytical chemistry. The authors present the results obtained in the separation of carrier-free radioisotopes; separation of Ba, Sr, Y, La; preparation of 228(Ra) from thorium; separation of Ca, Sr, Ba, and Ra. All the results were obtained with Dowex 50.
Date: 1960
Creator: Duyckaerts, G.; Lejeune, R. & Davis, P. S.
Item Type: Refine your search to only Report
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Investigation on Complexing in Solution by the Distribution Method. The System Selenenoyl-2-acetone-Th(IV)-CHCl3-H2O

Description: Selenenoyl-2-acetone is much more suitable for the extraction of thorium from aqueous solutions than acetylacetone, which is extensively used for this purpose. The stability constants of thorium selenenoyl-2-acetoneates and the distribution coefficient of the extracted complex in the CHCl3-H2O system have a higher value than those of the acetylacetonates of this element.
Date: 1960
Creator: Peshkova, V. M.; Zozulya, A. P. & de Bruin, H. J.
Item Type: Refine your search to only Report
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The Influence of Corpuscular Rays on the Creep Behaviour of Metallic Materials

Description: The main difficulties of experiments on the influence of radiation on creep is metals are discussed. Some typical apparatuses for investigation by using natural sources, reactors, cyclotrons, etc., are described. These methods have resulted in relatively inaccurate measurements up to now. Therefore, the published results do not allow any statement of laws, but only tendencies. There is a surprising influence of charged particles on creep rate in spite of their low depth of penetration. The disc… more
Date: 1960
Creator: Saur, G.; Laue, H.; Borchers, H. & Cecers, K. E.
Item Type: Refine your search to only Report
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Investigation of the Reaction of Beryllium with Aluminon

Description: The complex formation reaction between beryllium and aluminon was investigated for different values of pH. It was established that at pH between 4 and 5 a complex is formed containing the constituents in the ratio 1 : 1 . At a pH between 7 and 8 a complex is formed having a beryllium-aluminon ratio of 3 : 1. At pH 6 both complexes are formed . It is shown that the complexes can be distinguished optically and in other aspects. The colorimetric determination of beryllium with aluminon is made at … more
Date: 1960
Creator: Serdyuk, L. S. & de Bruin, R. J.
Item Type: Refine your search to only Report
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Determination of the Formation Constant of Indiumacetylacetonate by an Extraction Method

Description: 1. The solubility of acetylacetone has been determined in an acetate buffer solution of ionic strength C.1 in relation to pH and temperature. 2. The distribution coefficients of acetylacetone have been determined between chloroform, carbon tetrachloride, benzene and an acetate buffer solution in relation to acetylacetone concentration and pH. 3. The relationship has been established between the rate at which indium acetylacetonate reaches partition equilibrium and the pH, initial acetylacetone … more
Date: 1959
Creator: Rudenko, N. P. (Nikolaĭ Petrovich); Stary, I. & de Bruin, H. J.
Item Type: Refine your search to only Report
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Two Modes of Pulse Recording on Magnetic Tape

Description: 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 … more
Date: December 1963
Creator: Fookes, R. A.
Item Type: Refine your search to only Report
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Further Examination of H.T.G.C.R. Fuel Cycle Costs

Description: The equation for the H.T.G.C. reactor fuel costs developed previously in AAEC/TM141 has been modified and applied to "heterogenous" fuel systems. Fuel costs are reduced by 20-25 per cent in these systems relative to the "homogeneous" systems; these advantages arise from the longer life which may ben assumed for the unfueled beryllia and cheaper fabrication costs. The effects of reduced beryllia costs on fuel cycle costs are also examined.
Date: November 1963
Creator: Wright, W. J.
Item Type: Refine your search to only Report
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A Method for Measuring the Densities of Single Crystals of Beryllium Oxide

Description: A method is described whereby the density of a single crystal of beryllium oxide can be measured by suspending it in a dense liquid. The method is being used to measure radiation-induced changes in density and is sensitive to 1 part in 10(5). The absolute accuracy has not been established owing the lack of a suitable standard.
Date: September 1963
Creator: Hemphill, R. J. & Hanna, G. L.
Item Type: Refine your search to only Report
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Oxygen Quenching Errors in Liquid Scintillation Counting of C14O2 Following Schoniger Flask Combustion

Description: Kalberer and Rutschmann (Helv, Chim, Act, 44 : 1956, 1961) described a method of estimating quantitatively C-14 compounds on a paper carrier, for example chromatograms. The sample is combusted in oxygen, the C14O2 produced being absorbed in ethanolamine solution and counted by liquid scintillation techniques. However, errors occur where there are deviations from their experimental conditions, such as in counting equipment or weight combusted, owing to differing concentrations of dissolved oxyge… more
Date: September 1963
Creator: Matthews, R. W.
Item Type: Refine your search to only Report
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Theoretical Estimates of the Fast Neutron Eleatic Scattering Rate in Some Small Irradiation Specimens

Description: Order-of-magnitude estimates of the fast neutron elastic scattering rate have been obtained to supplement metallurgical studies of the fast neutron damage in some small beryllium oxide-based dispersed fuel specimens. The elastic scattering rate for neutrons with energies above 0.1 MeV is shown to be of the the order of 30 per cent of the fission neutron release rate in the specimens, owing to significant fast neutron leakage. The ratio of the Be (n,2n) reaction rate to the fission neutron relea… more
Date: September 1963
Creator: Lawrence, B. R.
Item Type: Refine your search to only Report
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The Irradiation Behaviour of Beryllium Oxide Based Dispersion Fuels - a Literature Review

Description: The results of unclassified experiments on the irradiation behaviour of BeO fueled with UO2 and (U,Th)O2 are summarized and discussed. The overall picture is still somewhat confused owing to the different experimental conditions used by different workers. A serious deficiency in most of the work is the failure to quote the energies of the irradiation neutrons and it is not clear whether the observed changes are due to fission fragment or fast neutron bombardment. The irradiation behaviour, in g… more
Date: August 1963
Creator: Hanna, G. L.
Item Type: Refine your search to only Report
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Adaptation of the Siemens Diffractometer for Precision Lattice Parameter Determinations of Single Crystals

Description: Modifications to the A.A.E.C.'s Siemens Diffractometer are described which enable precision lattice parameter determinations on single crystals. Analysis of the errors and consideration of results suggest that accuracies of about 1--2 parts in 10/sup 5/ are obtained on small beryllium oxide crystals. Details of alignment and measurement procedure are included.
Date: August 1963
Creator: Mayer, R. M. & Walker, D. G.
Item Type: Refine your search to only Report
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Solvent Extraction Processes for the Recovery and Separation of Uranium and Thorium - a Literature Survey

Description: A summary of the available literature on the development of the various processes for the separation of uranium and thorium from aqueous nitrate solutions is presented. Flowsheets are given corresponding to the various stages in the development of the Thorex processes.
Date: August 1963
Creator: Alfredson, Peter George & Farrell, M. S.
Item Type: Refine your search to only Report
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The Fixation of Caesium on Australian Minerals. Part 2, Zeolite Minerals

Description: Samples from possible zoolite bearing deposits have been tested for cation exchange capacity using batch and column experiments. The best material, Eagleton Quarry pink shale, was given more exhaustive column tests to determine the effect of mineral particle size, influent flowrate, and the presence of competing cations on caseium breakthrough. Diffusion of caesium ions through the mineral particle controls the ion exchange process. At the optimum size of (-30+36) B.S.S. the cation exchange cap… more
Date: July 1963
Creator: Frost, C. R.
Item Type: Refine your search to only Report
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The Fixation of Caesium on Australian Minerals. Part 1, Vermiculite Minerals

Description: Samples of vermiculite from Young River, W.A., and Kingaroy, Qld., have tested for cation exchange capacity using batch and column experiments. The better material, Young River vermiculite, was given more exhaustive column tests to determine the optimum particle size and to investigate its selectivity for caesium ions in the presence of higher concentrations of competing ions. At the optimum particle size of (-30+60) B.S.S. the cation exchange capacity of Young River vermiculite was approximate… more
Date: July 1963
Creator: Frost, C. R.
Item Type: Refine your search to only Report
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A Differential Transformer Measuring Apparatus

Description: The equipment described was designed for static displacement measurements with linear differential transformer transducers in applications requiring high sensitivity and low drift. The output from the circuit is display on a 10 mV f.s.d. potentiometric recorder and an a.c. back-off arrangement allows the same basic sensitivity up to 20 times full scale deflection. Weekly drift of the output is less than 0.1 mV which is equivalent to an input drift of 0.005 mV. For longer term measurements any d… more
Date: 1963
Creator: Fraser, H. J.
Item Type: Refine your search to only Report
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