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The Tracking of Particles Through a Hexagonal Lattice of Homogeneous Circular Rods for Monte Carlo Applications

Description: A description is given of a method used to determine the co-ordinates of successive collision points in a problem associated with the diffusion of neutrons through a hexagonal lattice of circular rods. The basic geometrical relations and a computer flow charge are includes.
Date: 1962
Creator: Thompson, J. J.
Partner: UNT Libraries Government Documents Department
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The Irradiation Behaviour of Hot-Pressed Dispersions of (U, Th)Be13 in Beryllium :Second Irradiation Experiment

Description: Fuel specimens having uranium—thorium beryllides as the fissile bearing phase were irradiated at 400 to 700 ºC to burn—ups between 7 and 11a/0 uranium in a predominantly thermal flux, two specimens of massive (U;Th)Be13 exhibited good dimensional stability and low fission gas release. Dispersion specimens containing 20, 35, and 50v/o (U,Th)Be13 swelled by 3 to 18 per cent, and released up to 33 per cent, of the gaseous fission products. The results indicate that the mixed beryllide is an inhere… more
Date: November 1963
Creator: Hanna, G. L.; ickman, B. S. (Brian Stuart) & Hilditch, R. J.
Partner: UNT Libraries Government Documents Department
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Irradiation of Beryllium at Elevated Temperatures. Part II. Irradiation of Rig X-74 in HIFAR

Description: Beryllium metal specimens fabricated by various routes were examined after irradiation to fast neutron doses of 5.5 x 1020 to 9 x 1020 nvt at temperatures of 450, 550, and 650ºC. The results were in general agreement with those reported previously for similar material irradiated to lower doses. Density changes of any significance were observed only at 650ºC. Serious loss of high temperature ductility occurred in all materials and was again attributed to helium bubble formation at grain boundari… more
Date: December 1963
Creator: Hickman, B. S. (Brian Stuart) & Bannister, G.
Partner: UNT Libraries Government Documents Department
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Sintering Studies on Ceramic Fuel Materials

Description: Satisfactory dense crack—free dispersions of spheroidal UO2 — ThO2 particles in BeO can be produced by "co-sintering", a process in which unsintered particles are hydrostatically pressed in BeO and the dispersion is sintered in one step, the large voids and cracks in dispersions of fully sintered particles in BeO following sintering are related to mismatched sintering shrinkage between the two phases; they are probably indicative of a high interfacial energy between the two phases. Co—sintering… more
Date: January 1964
Creator: Reeve, Keith Desmond, 1928- & Jones, K. A.
Partner: UNT Libraries Government Documents Department
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Automatic Scaler A.A.E.C. Type 2A -- Service Manual

Description: This manual is intended to give operating and maintenance information for the range of counting equipment in use by the A.A.E.C. at Lucas Heights, designation of Scaler Type 2A. This equipment has been designed in the General Physics Section of the A.A.E.C. General Nucleonics Division. The equipment was built by an Australian manufacturer (Siemens Nucleonics).
Date: July 1963
Creator: Fraser, H. J. & Waldron, C.
Partner: UNT Libraries Government Documents Department
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Transistorised Temperature Controller A.A.E.C. Type 30

Description: This manual gives a description, operating instructions, circuit diagram and parts list of Transistorised Temperature Controller type 30 designed in the laboratories of the Australian Atomic Energy Commission.
Date: August 1963
Creator: {{{name}}}
Partner: UNT Libraries Government Documents Department
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A Basis for the Computation of the Energy Dependence of the Neutron Flux and Slowing Down Density in a Bare Reactor

Description: A method is described for the computation of the energy dependence of the neutron flux and slowing down density in a bare reactor to form the basis of a 7090 Fortran computer program for survey studies of power reactors. Allowance is made for resonance absorption and resonance fission, neutron thermalisation, fast neutron reactions including (n, 2n) and (n, n), and anisotropic elastic scattering.
Date: September 1963
Creator: Lawrence, B. R.
Partner: UNT Libraries Government Documents Department
open access

MULGA : a Complex of Codes for the Determination of Multigroup Averaged Neutron Cross Section Data

Description: A complex of computer programmes called MULGA is described which will produce multigroup cross sections in a format suitable for input into a selection of reactor codes. Always bearing in mind that the spatial variation of flux will frustrate any determination of "exact" cross sections the maximum accuracy has been striven for within the limitations of urgency and feasibility. The programmes; together with an associated microscopic data library tape, and a specialised monitor system, have been … more
Date: December 1963
Creator: Clancy, B. E.; Doherty, G.; Keane, A.; Kletzmayr, E. & Pollard, J. P.
Partner: UNT Libraries Government Documents Department
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A Comparative Study of Two Grades of BeO

Description: Pechiney and Brush UOX BeO differ markedly in fabrication behaviour, only Brush UOX being readily sinterable. A comparative study of the two powders has shown few outstanding differences in powder properties. Both are of high purity but contain free and combined moisture to the extent of about 1.5 per cent. Pechiney BeO has a larger mean crystallite size (0.2 — 0.3μ) than Brush UOX (0.1 — 0.15μ) and a larger range of crystallite size, and both contain a small proportion of crystallites of size … more
Date: November 1961
Creator: Reeve, Keith Desmond, 1928- & Ramm, E. J.
Partner: UNT Libraries Government Documents Department
open access

Study of the Variables Affecting the Corrosion of Beryllium in Carbon Dioxide

Description: Beryllium is a favoured canning and/or moderating material in the proposed Australian High Temperature Gas Cooled Reactor. With carbon dioxide as the most likely coolant a detailed knowledge of the corrosion of beryllium in this gas is required. Two separate investigations have proceeded simultaneously. First the effect of the following variables was studied; surface preparation of the specimen, temperature (100—725ºC), pressure (0—280 p.s.i.g.), velocity, and impurity content of the gas. The i… more
Date: December 1961
Creator: Draycott, A.; Nicholson, F. D.; Price, G. H. & Stuart, W. I.
Partner: UNT Libraries Government Documents Department
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Determination of the Stability Constants of Salicylato-Beryllium Complexes by a Distribution Method

Description: An investigation of the solvent extraction behavior of salicylato- beryllium complexes is reported. A simplified method for calculating the stability constants has been developed. The values obtained are beta /sub 1/ = 4.0 x 10/sup 12/ and beta /sub 2/ = 4 3 x 10/sup 22/ in 0.15 M sodium perchlorate. (auth)
Date: November 1, 1961
Creator: Szego, L. E.
Partner: UNT Libraries Government Documents Department
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The Microbiology of Heavy Water in the HIFAR Reactor

Description: The high flux research reactor HIFAR contains ten tons of heavy water which acts as moderator and primary coolant. Over an eighteen months period regular microbiological examinations have been carried out on samples of heavy water taken from various parts of the circuit. The heavy water circuit provides an interesting opportunity for the study of microorganisms because of the high isotopic purity (greater than 99.6 per cent.), and the high chemical purity of the heavy water in the reactor. Furt… more
Date: June 1962
Creator: Davis, P. S. & McPherson, G. G.
Partner: UNT Libraries Government Documents Department
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Extraction of Beryllium by Triisooctylamine : the Effect of the Anionic Complexing Agent

Description: The extraction of beryllium by triisooctylamine is measured over the pH range from 1 to 10, in the presence of malonic, maleic, succinic, phthalic, and salicylic acids. Values are obtained for the stability constants of the various metal-acid complexes by potentiometric titration. The degree of extraction is dependent on the abundance of the anionic complex present in the aqueous phase and this is in turn dependent on the strength of the corresponding acid and the stability of the complex. (aut… more
Date: September 1, 1961
Creator: De Bruin, H. J.; Kairaitis, D. & Temple, R. B.
Partner: UNT Libraries Government Documents Department
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Slowing-Down Spectra of Neutrons in Heavy Water and Light Water Mixtures

Description: The slowing down spectra of neutrons were obtained for heavy water, light water, and mixtures of heavy water and light water. It was assumed that fission neutrons are produced uniformly throughout an infinite moderator and the only process considered was elastic scattering, spherically symmetric in the center-of-mass system. The (n,2n) reaction with the deuterium nucleus and absorption were assumed negligible. The average transfer cross section, fast diffusion coefficient, the slowing down area… more
Date: October 1, 1961
Creator: Duncan, M. Elaine; Hines, K. C. (Kenneth Charles), 1926-2005 & Pollard, J. P. (John Percival)
Partner: UNT Libraries Government Documents Department
open access

Automatic Solution of Optimum Design Problems on a Digital Computer

Description: A description is given of a method suitable for the automatic solution of certain optimum design problems on a digital computer for cases where the number of constraints imposed on the design is not greater than the number of design variables. The problem is transformed to one requiring the minimization or maximization of an unconstrained function, for which a gradient method is used.
Date: March 1962
Creator: Lawrence, B. R.
Partner: UNT Libraries Government Documents Department
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Reactions of Preoxidized Beryllium Powder in Moist Carbon Dioxide

Description: Breakaway corrosion of Be in moist CO2 can be avoided if the Be is fabricated using preoxidized powder. The powder is preoxidized by heating in dry O/sub 2/. Preoxidation of Be powder was measured as a function of temperature and time of heating in O/sub 2/. The subsequent reactions of the preoxidized powder in moist CO/sub 2/ at 700 deg C were studied and the effect of increasing amounts of added oxide was measured. A model is proposed to explain the inhibition of corrosion by added oxide. (au… more
Date: June 1962
Creator: Adams, R. B.; Price, G. H. & Stuart, W. I.
Partner: UNT Libraries Government Documents Department
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A Relocatable Assembly System for the I.B.M. 1620 Computer

Description: The indirect addressing feature of the I.B.M.1620 computer has been used to overcome the difficulty of cross—referencing separately assembled subroutines within a computer programme. A relocatable assembler has been devised which permits the separate assembly and testing of such subroutines. The concept of a "next subroutine" has been introduced, and its applications to interpretive systems such as Fortran shown.
Date: April 1962
Creator: Richardson, D.J.
Partner: UNT Libraries Government Documents Department
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Fuel Element Transient Temperature Studies

Description: A method is presented for the analysis of transient temperatures in a homogeneous circular cylindrical fuel element in a coolant channel with no axial conduction and no heat loss to the channel wall. In addition, some results were obtained for mean fuel element temperatures in power transients for a simpler model, but accounting for details of the axial coolant temperature distribution in the unsteady state. (auth).
Date: November 1, 1961
Creator: Thompson, J. J.
Partner: UNT Libraries Government Documents Department
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Purification of Carbon Dioxide for Reactor Purposes. Part III, Drying

Description: Comparison of the adsorption characteristics of the desiccants silica gel, alumina, and molecular sieves has shown that molecular sieves have by far the greatest capacity of the desiccants at the low partial pressures considered. Equilibrium data in the form of isotherms were established over the range of variables expected in the coolant circuit of a proposed Australian H.T.G.C. reactor. The mass transfer from the gas phase to molecular sieves is such that no correlation could be attempted for… more
Date: April 1962
Creator: Draycott, A. & Kerr, A. C.
Partner: UNT Libraries Government Documents Department
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Design of Concentric Tubular Reactor Fuel Elements for Uniform Coolant Conditions

Description: Concentric tubular reactor fuel element geometries to give equal coolant outlet temperatures are presented. Oscillations from tube to tube in thickness and temperatures generally occur but it is possible to eliminate them by choice of the centre element. This may be a fuel rod or a non-heat—producing rod with or without a surrounding annulus of fuel. The geometries and temperatures are dependent on the voidage and on a non-dimensional parameter equivalent to a Biot number based on the channel e… more
Date: June 1962
Creator: Binns, Ian M.
Partner: UNT Libraries Government Documents Department
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The Reprocessing of Homogeneous Beryllium-Base Reactor Fuel : a Suggested Scheme for the Selective Aqueous Dissolution of the Matrix

Description: The matrix of a dilute homogeneous H.T.G.C. reactor fuel employing metallic beryllium as a moderator can be selectively dissolved by a caustic soda solution containing salicylate ion. At least 99 percent of the uranium and thorium can be recovered as insoluble solids, but in the case of irradiated material the uranium loss might be higher. Some decontamination of the resulting beryllium solution from fission products and Pa233 can also be obtained. A tentative chemical flowsheet is proposed on … more
Date: August 1962
Creator: Farrell, M. S. & Temple, R. B.
Partner: UNT Libraries Government Documents Department
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Axial Temperature Distributions in Concentric Cooling Channels Surrounding a Heat Generating Source

Description: A set of simultaneous differential equations is established to describe the temperature distribution for coolant flow in three concentric channels separated by walls of finite thermal conductivity and surrounding a cylindrical heat source. The solution of this set of differential equations is dependent on the heat source function Q(z) which must be known or specified. An assumed function Q(z) constant is taken as being a representative case and the resultant solutions are applied to several geo… more
Date: 1962
Creator: Carr, F. H.
Partner: UNT Libraries Government Documents Department
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The Ion Exchange Behaviour of Beryllium Salicylate Complexes

Description: As part of a general study of the co-ordination chemistry of beryllium, the beryllium salicylate complexes have been investigated by ion exchange procedures. The evidence indicates that a neutral 1 : 1 and an anionic 1 : 2 chelate exist in solution under appropriate conditions, and their stability constants have been determined by ion-exchange methos. The values of the stability constants were found to be [beta]1 = 4.97 x 10 (12), and [beta]2 = 2.63 x 10(22).
Date: August 1962
Creator: Fardy, John Joseph
Partner: UNT Libraries Government Documents Department
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