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Alloying and heat treatment optimization of Fe/Cr/C steels for improved mechanical properties

The effects of alloying elements and heat treatments on the microstructural changes and strength-toughness properties were investigated in optimization of vacuum melted Fe/Cr/C base steels. The structure of the steels in the as-quenched conditions consisted of highly dislocated autotempered lath martensite (strong phase) and thin continuous interlath films of retained austenite (tough phase). It has been emphasized again that the mechanical properties of the steels are sensitive to the amount a… more

Date: June 1, 1979

Creator: Sarikaya, M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Assembly, operation and disassembly manual for the Battelle Large Volume Water Sampler (BLVWS)

Assembly, operation and disassembly of the Battelle Large Volume Water Sampler (BLVWS) are described in detail. Step by step instructions of assembly, general operation and disassembly are provided to allow an operator completely unfamiliar with the sampler to successfully apply the BLVWS to his research sampling needs. The sampler permits concentration of both particulate and dissolved radionuclides from large volumes of ocean and fresh water. The water sample passes through a filtration secti… more

Date: December 1, 1984

Creator: Thomas, V.W. & Campbell, R.M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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High power, high frequency lasertron rf sources

High power rf sources have historically been limited to frequencies at which intense electron beams could be efficiently modulated. We have been exploring the power, frequency and efficiency limitations associated with the use of lasertrons for generating modulated beams and using these beams as high power microwave sources. This effort is an extension of wake field accelerator development, and will proceed as part of the Argonne Wakefield Accelerator construction and use. In the lasertron the … more

Date: January 1, 1990

Creator: Norem, J.; Chojnacki, E. & Konecny, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Western Gas Sands Project. Status report, 1 January 1979--31 January 1979

Aim is to increase gas production from the low-permeability gas sands of the western U.S. Progress is reported on: project management, resource assessment, R and D at various facilities, and field tests and demonstrations. (DLC)

Date: January 1, 1979

Creator: Atkinson, C H

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Resonance production in two-photon interactions

Resonance production in two-photon interactions is studied using data collected with the ASP detector at the PEP e/sup +/e/sup /minus// storage ring located at the Stanford Linear Accelerator Center. The ASP detector is a non-magnetic lead-glass calorimeter constructed from 632 lead-glass bars. It covers 94% of 4..pi.. in solid angle, extending to within 20/degree/ of the beamline. Lead-scintillator calorimeters extend the coverage to within 21 mr of the beamline on both sides. Energy resolutio… more

Date: February 1, 1989

Creator: Roe, N.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Impact of an apparent radiation embrittlement rate on the life expectancy of PWR (pressurized-water-reactor) vessel supports

Recent data from the HFIR vessel surveillance program indicate a substantial radiation embrittlement rate effect at low irradiation temperatures (/approximately/120/degree/F) for A212-B, A350-LF3, A105-II and corresponding welds. PWR vessel supports are fabricated of similar materials and are subjected to the same low temperatures and fast neutron fluxes (10/sup 8/ /minus/ 10/sup 9/ n/cm/sup 2//center dot/s, E > 1.0 MeV) as those in the HFIR vessel. Thus, the embrittlement rate of these structu… more

Date: January 1, 1989

Creator: Cheverton, R.D.; Pennell, W.E.; Robinson, G.C. & Nanstad, R.K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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One-dimensional model for transient boilup of volume-heated pools for LMFBR transition phase analysis

An analytical model is presented which describes the transient dispersion characteristics of fuel-steel boiling pool systems under decay heating conditions, with boundary heat losses. The spatial distribution of steel vapor (void fraction) and molten fluid is computed, together with the pressure--temperature histories of boiling pool systems. Local heat losses and sensible heating are included in the model for the vapor generation rate in the material balance equations. Model calculations are p… more

Date: January 1, 1979

Creator: Ginsberg, T. & Chen, J. C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Cascade Inertial-Confinement-Fusion Power Plant

The Cascade reactor is double-cone shaped with a maximum radius of 5 m. It rotates at 50 rpm. The average temperature of a three-material flowing granular blanket leaving the reactor is 1440 K. Heat from the blanket is transferred to helium gas in a shell- and ceramic-tube-type heat exchanger that has a separate region for each blanket material. Diffusion of tritium from the blanket granules through the heat exchanger is only 25 Ci/d, so no intermediate loop is needed for isolation. We selected… more

Date: November 13, 1985

Creator: Pitts, J. H. & Maya, I.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Turbulent sweeping flow mixing model for wire wrapped LMFBR assemblies

A physical model is proposed to derive the sweeping flow for LMFBR triangular array wire-wrapped assemblies under the turbulent flow condition. Two correlations are suggested for the sweeping flow through two different types of gaps between subchannels, the gap between the interior subchannels and the gap between the wall subchannels. These two sweeping flow correlations are evolved by calibrating the constants in the proposed model against the available experimental data. Agreement between the… more

Date: October 1, 1978

Creator: Chiu, C.; Rohsenow, W.M. & Todreas, N.E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Space nuclear safety and fuels program. Progress report, June 1981

This technical monthly report covers studies related to the use of /sup 238/PuO/sub 2/ in radioisotope power systems carried out for the Office of Coordination and Special Projects of the US Department of Energy by Los Alamos National Laboratory. Most of the studies discussed here are ongoing. Results and conclusions described may change as the work continues. Published reference of the results cited in this report should not be made without the explicit permission of the person in charge of th… more

Date: October 1, 1981

Creator: Bronisz, S. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Microcomputer based test system for charge coupled devices

A microcomputer based system for testing analog charge coupled integrated circuits has been developed. It measures device performance for three parameters: dynamic range, baseline shift due to leakage current, and transfer efficiency. A companion board tester has also been developed. The software consists of a collection of BASIC and assembly language routines developed on the test system microcomputer.

Date: February 1, 1981

Creator: Sidman, S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Functions of the cask maintenance facility: A white paper

The shipping cask systems are the mobile components of the transportation system, designed to safely transport spent nuclear fuel between different facilities under both normal and accident conditions. The cask system will consist of the heavily shielded cask, the cask transport vehicle (truck trailer or railcar), and any associated ancillary equipment (covers, impact limiters, lifting devices, etc.). The cask and certain parts of the cask system must be operated within the limits imposed by a … more

Date: July 21, 1987

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Linearization algorithms for line transfer

Complete linearization is a very powerful technique for solving multi-line transfer problems that can be used efficiently with a variety of transfer formalisms. The linearization algorithm we describe is computationally very similar to ETLA, but allows an effective treatment of strongly-interacting lines. This algorithm has been implemented (in several codes) with two different transfer formalisms in all three one-dimensional geometries. We also describe a variation of the algorithm that handle… more

Date: November 6, 1990

Creator: Scott, H.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Coal distribution, January--June 1991

The Coal Distribution report provides information on coal production, distribution, and stocks in the United States to a wide audience including Congress, Federal and State agencies, the coal industry, and the general public. The data in this report are collected and published by the Energy Information Administration (EIA) to fulfill its data collection and dissemination responsibilities as specified in the Federal Energy Administration Act of 1974 (Public Law 93-275, Sections 5 and 13, as amen… more

Date: October 21, 1991

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Pion nucleon interaction at low energy

A theory of the ..pi..N interaction at low energy is described. An analogy is made with an unusual approach to potential scattering theory. Phase shifts, cross sections, and scattering amplitudes and lengths are calculated. 28 references. (JFP)

Date: March 1, 1979

Creator: Banerjee, M.K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Radiation effects and micromechanics of SiC/SiC composites

The development and use of SiC/SiC composite structures will achieve the following benefits to the fusion program: improved high-temperature energy conversion in the blanket modules, resulting in improved cost of electricity; enhanced feasibility for passive safety features in case of operational or intentional accidents; and reduced amount of radioactivity and beneficially changed decay characteristics. We report here our progress made on fundamental understanding of displacement damage in SiC… more

Date: January 1, 1991

Creator: Ghoniem, N. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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H/sup -/ and D/sup -/ production by backscattering from surfaces

Three experiments are described in which H/sup -/ or D/sup -/ ions have been produced by backscattering from surfaces coated with alkali metals: (1) Backscattering of H/sup -/ and D/sup -/ produced by 0.15- to 4-keV/nucleus H/sub 2//sup +/, H/sub 3//sup +/, D/sub 2//sup +/, and D/sub 3//sup +/ bombarding clean targets of Cs, Rb, K, Na, and Li. For each target, the H/sup -/ and D/sup -/ yields were maximized at incident energies between 300 and 1200 eV/nucleus and always at a lower incident ener… more

Date: April 1, 1981

Creator: Berkner, K. H.; Ehlers, K. W.; Graham, W. G.; Leung, K. N.; Pyle, R. V.; Schneider, P. J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Wideroe-based heavy ion preaccelerator for the SuperHILAC

A new high-mass, high intensity injector for the SuperHILAC has been approved and is under construction at LBL. A high power intermediate charge state ion source and accompanying low-velocity linac will provide beams for subsequent acceleration by the SuperHILAC. Both axially and radially extracted ion sources will be accommodated and charge state analyzed in the 750 kV, 100 kHz Cockcroft-Walton terminal. The LEBT will provide isotopic analysis to 1 part in 300. A 5m long, 23.4 MHz Wideroe lina… more

Date: March 1, 1979

Creator: Staples, J. W.; Lancaster, H. D. & Yourd, R. B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Dynamic aperture of the ALS (Advanced Light Source) booster synchrotron

Effect of the anticipated lattice imperfections on the dynamic aperture of the ALS booster synchrotron were studied using a particle tracking method. The dynamic aperture was found to be sufficiently large at the selected operating points and at the designed repetition rate. 4 refs., 4 figs., 3 tabs.

Date: March 1, 1989

Creator: Kim, C.H. & Nishimura, Hiroshi

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Inclusive production of strange and vector mesons in e/sup +/e/sup -/ annihilation at 29 GeV

The Mark II detector is used to measure the inclusive production rates for K/sup 0/, K/sup + -/, rho/sup 0/, K*/sup 0/ and K*/sup + -/ in a sample of 59,489 hadronic events produced in e/sup +/e/sup -/ annihilation at 29 GeV. The inclusive rates for rho/sup 0/ and K*/sup 0/ + anti K*/sup 0/ production for momenta greater than 1 GeV/c are found to be 0.44 +- 0.04 +- 0.06 per event and 0.42 +- 0.05 +- 0.08 per event respectively. The rate for K*/sup + -/ production for momenta greater than 2 GeV/… more

Date: November 1, 1984

Creator: Schellman, H. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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The three-point function as a probe of models for large-scale structure

The authors analyze the consequences of models of structure formation for higher-order (n-point) galaxy correlation functions in the mildly non-linear regime. Several variations of the standard [Omega] = 1 cold dark matter model with scale-invariant primordial perturbations have recently been introduced to obtain more power on large scales, R[sub p] [approximately]20 h[sup [minus]1] Mpc, e.g., low-matter-density (non-zero cosmological constant) models, [open quote]tilted[close quote] primordial… more

Date: June 19, 1993

Creator: Frieman, J.A. (Fermi National Accelerator Lab., Batavia, IL (United States)) & Gaztanaga, E. (Univ. of Oxford (United Kingdom))

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Photodisintegration of the deuteron with polarized photons from LEGS

An experiment is described which will measure the d(..gamma..,p) reaction with polarized photon beams from LEGS ranging in energy from 50 MeV to 530 MeV. The data will yield a new high-resolution high-statistics determination of the total unpolarized cross section, will isolate for the first time the polarization dependent part of the reaction, and will measure the photon-beam asymmetry with much higher resolution and accuracy than available from existing data. These will provide one of the mos… more

Date: January 1, 1985

Creator: Dowell, D. H.; Giordano, G.; Kistner, O.; Matone, G.; Sandorfi, A. M.; Schaerf, C. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Longwall mining of thin seams

Thin seam operations pose a challenge to the ingenuity of mining engineers to overcome the factor of human inconvenience in the restricted environment and associated high cost production. Surprisingly, low seam longwalls in the Federal Republic of Germany in an average thickness of 35 in. and dipping less than 18/sup 0/ come close to achieving the average production rate of all German longwall operations. They are all plow faces, and a consistent production of 3300 tons per day and a productivi… more

Date: January 1, 1981

Creator: Curth, E A

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Thermodynamics of copper-nickel alloys containing aluminum, silicon, titanium, and chromium relative to their use in ceramic brazing

By varying the copper-to-nickel ratio the activity coefficients of Al, Si, Ti, and Cr can be varied over a wide range. Thus to a degree one can tailor the behavior of such alloys for usefulness in brazing ceramics. Further, considerable amounts of these active elements can be present while the ability of carbon to reduce the surface oxide film in a high-vacuum system is retained. The critical aluminum concentrations required to prevent the formation of SiO/sub 2/, TiO, or Cr/sub 2/O/sub 3/ by r… more

Date: November 1, 1984

Creator: Williams, R. O.

Item Type: Report

Partner: UNT Libraries Government Documents Department