The computer program 1559/RE is an experimental IBM-704 code in FORTRAN language for computing the resonance integrals of isotopes in mixtures in the presence of hydrogenic moderation. There may be up to four isotopes, each with no more than 75 resolved resonance levels. Doppler broadening and interference scattering are included No estimate is made of contributions from unresolved resonances. Typical running times are 30 min (with no Doppler broadening) to 90 min (with Doppler broadening) for problems involving 67 levels and unit lethargy widths. Input and theory are discussed, and a typical listing is given. (auth)

Declassified 4 Sep 1973. A hot-working device for compression of graphite bodies was used to deform cylindrical specimens of matrix graphite containing ZrC or UC-ZrC particles to strains of the order of 30% at temperatures of 2400 to 2900 deg C. The graphite bodies containing ZrC particles (chosen as representative carbide particles) were found to be more plastic near 2500 deg C than similar bodies containing no carbide particles. Microradiographic techniques were used to determine diffusion coefficients of U and Th on actual coated particles by nondestructive means. A tentative energy of activation for the migration of uranium from UC/sub 2/ particles into PyC coatings was determined over the temperature range 1850 to 2300 deg C. The penetration of U into the coatings is not uniform but occurs radially in localized positions, and then spreads circumferentially, creating a banded structure. These results show the importance of the structure of PyC in regard to the diffusion of both fuel and fission-product materials. It was also observed that the diffusion of U is considerably more rapid in the direction parallel to the layer planes in the PyC than it is in the perpendicular direction. Tests with PyC-coated (U, Zr)C particles in graphite-matrix …

This report summarizes the technical progress on the subject contract for the period March 15 to May 14 1963.

BS>The average energy required to form an ion pair, W, when alpha particles are absorbed in mixtures of argon with other gases is studied. The other gases were selected on the basis of their ionization potentials. One group consists of representative gases that have ionization potentials below that of Ar (15.77 ev) and above the doublet metastable state of Ar (11.49 and 11.66 ev). This list includes methane, carbon dioxide, nitrous oxide, xenon, and krypton. The other group of special interest consists of some gases with ionization potentials below the metastable state of Ar. All gases tested in these two groups cause an increase in ionization, i e., a decrease in W, when added to argon. As an illustration of this effect, the addition of 1/2% of acetylene to Ar will increase the ionization by 23% The experimental data, i.e., W as a function of relative concentration of the two gases, were fitted to a model in which it is assumed that energy is transferred from two excited levels in argon to the additive gases in collision processes. Good agreement between the experimental data and calculations based on the model is taken as additional evidence that the excited state notion …

This is an analysis, based on a test conducted by LASL personnel, to determine whether relative expansion of two pieces of graphite under bundling loads would result in failure of the graphite.

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An investigatiori of the annealing of the radioinduced carrier concentration change in Sb-doped Ge in the range 370 to 455 l K was made. The irradiations were conducted at liquid nitrogen temperature using Co/ sup 60/ gamma irradiation. A model that explains the observed behavior is presented. On the basis of the model, the observed annealing consists of vacancy diffusion simultaneously to impurity sites and annihilation centers. Analysis of the activation energy for the annealing process yields values of 0.8 to 1.4 ev in agreement with the range of energies that were attributed to vacancy motion but that cannot be resolved into unique components. The complex activation energy is explained by the model in terms of the impurity concentration. It was observed that the change in carrier concentration saturates before complete annealing is achieved. The saturation, which is stable for further annealing at higher temperatures, is also explained in terms of the model. The vacancies are considered to diffuse to annihilation centers, such as dislocation lines, and to the site adjacent to an Sb atom. Those that go to an Sb are trapped. The Sb- vacancy complex can break up to supply a vacancy back to the system or can …

This document describes procedures to be followed and the equipment necessary to perform the assembly of the phase 1 vibration Core and the Inner Reflector. It contains the sequence of operations and identifies additional documentation and supplementary information.

The design and development of rocket reactors are considered. Topics included are: thermodynamic calculations of vapor pressure of uranium dioxide, uranium xeonosulfide, uranium monocarbide, zirconium monocarbide, beryllia, and tungsten; thermodynamic calculations of equilibrium interactions of the above materials with hydrogen or water; verification of muitigroup constants used in reactor physics calculations; relations pertaining to a heat transfer parameter study; a heat transfer coefficient correlation for hydrogen; a FORTRAN-II subroutine to compute thermal properties of hydrogen; considerations pertaining to reactor control; and fuel plate stress analyses. (N.W.R.)

Strengths at failure are reported for a number of threaded beryllium specimens loaded in tension at room temperature and -320 degrees F. Loads greater than normal bolt strengths were repeatedly carried. The standard fine thread was somewhat stronger than the standard coarse thread. Material at the entrance of the hole should be counter-bored about one diameter deep in order to resist cone-type fracture. Pure tensile loading should be used. Possible shear loading should be carried by separate pins to avoid bending moments, since this effect has not yet been evaluated. Two diameters of thread engagement is sufficient for strength; greater engagement has no advantage.

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FUEL FABRlCATlON AND EVALUATION. The synthesis and fabrication of (UO/ sub 0.95/Pu/sub 0.05/)C/sub 0.98/ test specimens by cold pressing and sintering for out-of-pile property measurements were completed. Theoretical densities of 91% (avg) were obtained without sirtering aid and 96% (avg) with 0.1 wt% nickel sintering aid. Mixed sesquicarbide, ated into pellets 94% of theoretical density. Massive, carbon-stabilized PuO was synthesized by the carbon reduction of the dioxide. The carbon content of the product was 0.14 wt%. The coefficients of expansion of (U/sub 0.95/Pu/sub 0.05/)C/sub 0.098/ with and without nickel sintering aid were measured to 1400 deg C, and found to be 12.2 to 12.6 x 10/sup - 6/DEC. Measurements of melting point and vapor pressure of mixed monocarbides were started by testing standards. Compatibility tests at 593 and 816 deg C were started. Examinarion of results to date show a reaction between (U/sub 0.95/Pu/ sub 0.05/)C/sub 0.98/ and Zircaloy-2, and no reaction with type 316 stainless steel and niobium after 1000 hr at 816 deg C. This is similar to previous results with UC. IRRADIATION TESTS. The assembly of all the irradiation capsules was completed. Ten of the 12 planned specimens of (U/sub 0.8/Pu/sub 0.2/) C/sub 0.95/ are currently operating …

Selective hydrocracking of total coolant was found to be an efficient and economic method for reconstitution of high boiler in the coolant to usable product. Such a process could eliminate the expense of vacuum distillation and disposal of high boilers produced in a nuclear reactor power plant. The selective conversion was possible since polyphenyls were found to be more susceptible towards hydrocracking as the phenyl chain length increased. Both cobalt molybdate on alumina and nickel oxide on alumina (50 to 80 square meters per gram) were found to be efficient catalysts at conditions of 900 deg F and 1000 psig with the latter giving more selective conversion to terphenyls. Continuous flow hydrocracking tests on OMRE Core II cool ant (containing 23% high boiler) resulted in 90 to 100% conversion of high boiler at product recoveries of 85 to 95 wt%. Average molecular weights of the products (biphenyl and heavier) were in the range 205 to 225 compared to 270 for Core II coolant. High boiler in Core III-A coolant which contained mainly first-generation polymers (hexaphenyls) was slightly more refractory toward hydrocracking than Core II high boiler, and conversion decreased slightly with increasing on-stream time. However, at optimum condition for processing …

From Introduction : "This analysis partitions the electron density and the electronic pair density of the molecule into components corresponding promoted atomic states, to quasiclassical coulombic interactions of these promoted states, and to interactions resulting from the sharing of electrons between atoms."

Summaries are presented of research developments in: chemical- metallurgical processing studies in pyrometallurgy, fuel-processing facilities for EBR-H, and the chemistry of liquid metals; fuel-cycle applications of volatility fluidization techniques to laboratory- and engineering-scale investigations of fluoride volatility processes, and the conversion of UF/sup 6/ to UO/sup 2/; calorimetry studies of the combustion of metals in fluorine, and the development of a high-temperature enthalpy calorimeter,; reactor safety evaluations of metal oxidation and ignition kinetics, and metal-- water reactions; energy-conversion studies of regenerative emf cells, and thermoelectricity; the determination of nuclear constants for double neutron capture experiments, and capture and fission reactions in EBR-II; and routine operations in waste processing and in the high-level gamma-irradiation facility. (B.O.G.)

This report, from the Chemical Processing Department at HAPO for April 1963, discusses the following: Production operation; Purex and Redox operation; Finished products operation; maintenance; Financial operations, facilities engineering; research; employee relations; and weapons manufacturing operation.

ABS>The Gauss-Jordan, Choleski, congruent transformation, and rank annihilation methods for inverting large symmetric positive definite matrices were compared. An attempt was made to consider the effects of both condition and order of the matrix to be inverted on the closeness of the computed inverse to the exact inverse. Each method was programmed in FORTRAN using only single precision arithmetic. Then the error indicators were computed using double precision arithmetic so that the latter calculation was not a limiting factor. It was found that any one of the methods is satisfactory for a well-conditioned least squares matrix of order 10-30. However, when the matrix becomes ill- conditioned then the Gauss-Jordan method appears to be clearly superior (at least for the matrices studied). Algorithms and FORTRAN subroutines for each method are presented. (auth)

Report that "summarizes the costs, experience and results of contracts AT(10-1)-1054 and AT(10-1)-1122 for drilling, casing and cementing observation wells at the National Reactor Testing Station, Idaho" (p. [11]).

On the assumption that a Lockhart-Martinelli type of correlation is applicable, an analytical approach to the interpretation of pressure drop data on condensing flow in tapered tubes was developed with particular reference to the condensation of potassium in a radiant condenser of a type that may be attractive for space power plants. It appears that instability can be encountered in such condensers only through the introduction of excess liquid inventory at reduced power or by design of the condenser for insufficient pressure drop at design power. (auth)

This report has been prepared primarily for internal use. The computer program it describes is presently being revised as outlined in Section V of Part I. The lessons learned from experience on proper source mesh spacing, choice of conditional weight function, ect. are not discussed in this report. Use of the program to compute eigenvalues is only outlined. The latter will be discussed in a subsequent report.

This report addresses the conference on clean room specifications held at Sandia Laboratory Albuquerque, New Mexico during April 9 and 10, 1963.

The repulsion-coil technique for energy conversion offers a powerful, new tool in the field of acculeration testing. Using this technique, a prototype magnetic shock device was developed that uses electrical energy stored in a capacitor bank to produce high-g, mechanical acceleration pulses. A disc projectile is vacuum-held against the core of an electromagnet coil, and a crystal accelerometer is attached to the projectile to monitor the pulse. The capacitor bank is charged to a specific voltage between one and 20 kv, then discharged into the coil. The resultant magnetic field around the coil effects a repulsion of the projectile, which is mechanically free to move away from the coil. By varying the capacitor voltage, the magnitude of the pulse can be predicted and controlled. The application of electrical-energy conversion in the production of a controllable acceleration pulse toward development of a magnetic shock device for component testing and instrument calibration is demonstrated. (auth)

Report containing the procedures and results of tests made to determine the corrosion resistance of materials in a simulation of Hanford Laboratories' N-Reactor secondary system water environment.

Monthly newsletter of the High Plains Underground Water Conservation District No. 1, discussing the field of underground water. Topics include profiles of water conservation research, annual pre-plant soil moisture survey data, annual Winter Water Level measurement data, and information about the latest water conservation tips.