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Approach to decision modeling for an ignition test reactor

Description: A comparison matrix decision model is applied to candidates for a D-T ignition tokamak (TNS), including assessment of semi-quantifiable or judgemental factors as well as quantitative ones. The results show that TNS is mission-sensitive with a choice implied between near-term achievability and reactor technology.
Date: September 30, 1977
Creator: Howland, H.R. & Varljen, T.C.
Partner: UNT Libraries Government Documents Department
open access

Engineering design solutions of flux swing with structural requirements for ohmic heating solenoids

Description: Here a more detailed publication is summarized which presents analytical methods with solutions that describe the structural behavior of ohmic heating solenoids to achieve a better understanding of the relationships between the functional variables that can provide the basis for recommended design improvements. The solutions relate the requirements imposed by structural integrity to the need for producing sufficient flux swing to initiate a plasma current in the tokamak fusion machine. A method… more
Date: September 30, 1977
Creator: Smith, R. A.
Partner: UNT Libraries Government Documents Department
open access

Thermal design and analysis of superconductors for the toroidal field coils of TNS. [NbTi]

Description: The toroidal field coils in two of the four TNS field coil design options are superconducting. NbTi superconductors are used in the low field design option and Nb/sub 3/Sn superconductors are used in the high field design option. The preliminary conceptual design parameters of the coils and the superconductors have been developed. The selected coil shape is the pure tension D-configuration. The superconductors are the multifilamentary, cabled design and are cooled by forced flow supercritical h… more
Date: September 30, 1977
Creator: Lee, A. Y.
Partner: UNT Libraries Government Documents Department
open access

Spectra of matrix isolated metal atoms and clusters. [In rare gases]

Description: The matrix isolation spectra of all of the 40 presently known atomic metal species show strong matrix effects. The transition energies are increased, and the bands are broad and exhibit splitting of sublevels which are degenerate in the gas phase. Several models have been proposed for splitting of levels, but basic effects are not yet understood, and spectra cannot be predicted, yet it is possible to correlate gas phase and matrix in many of the systems. Selective production of diatomics and cl… more
Date: September 30, 1977
Creator: Meyer, B.
Partner: UNT Libraries Government Documents Department
open access

Stable propagation of an electron beam in gas

Description: Conditions for the stable propagation of a pinched electron beam in low pressure gas (p approximately 0.1 to 100 torr) are described. The observed window of good propagation around p approximately 2 torr air is interpreted as the quenching of the two-stream mode by sufficiently high plasma density and collision frequency, and the simultaneous suppression of the resistive hose mode by sufficiently rapid generation of electrical conductivity from breakdown ionization.
Date: September 30, 1977
Creator: Lee, E. P.; Chambers, F. W.; Lodestro, L. L. & Yu, S. S.
Partner: UNT Libraries Government Documents Department
open access

Poloidal field coil design for a fusion--fission breeder reactor

Description: The magnetic, structural, and thermal design of superconducting poloidal field coils for a tokamak fusion-fission breeder reactor are described. The design requirements and considerations, with the resulting parameters, are presented.
Date: September 30, 1977
Creator: Howland, H. R.; Kelly, J .L. & Chi, J. W. H.
Partner: UNT Libraries Government Documents Department
open access

Impurity and gas throughput control for TNS

Description: A model of the interaction between an ignited plasma and a wall is utilized to study the impact of impurities and recycled fuel ions and helium ash on the burn time of the plasma. The model indicates that the impurity concentration, n/sub im/, grows exponentially toward a maximum value determined by the confinement time for impurities, tau/sub im/, the sputtering coefficient, S/sub i/, and the isolation coefficient, ..cap alpha... The time for n/sub im/ to reach a critical value and quench the … more
Date: September 30, 1977
Creator: Sucov, E. W.
Partner: UNT Libraries Government Documents Department
open access

Electron--proton interactions at ISABELLE. [Possible experimental parameters, 400 GeV, cross sections, kinematics]

Description: A calculation of kinematics and cross sections is done for an investigation of the physics possibilities specific to the study of weak interactions in electron-proton interactions at Isabelle at 400 GeV, with an electron/positron storage ring of 20 GeV. (JFP)
Date: August 30, 1977
Creator: Limon, P.J. & Humphrey, J.W.
Partner: UNT Libraries Government Documents Department
open access

Electrical design of TNS

Description: The electrical design of the ORNL-Westinghouse next step (TNS) fusion reactor was begun in 1976, using a set of ground rules which were based on the overall program objectives. These objectives were to identify the design of reasonably-priced reactors, which would achieve ignition and be technology forcing. The term ''technology forcing'' was understood to mean the desirability of a large number of ignited D-T pulses and the incorporation of superconducting toroidal field (TF) coils, if at all … more
Date: September 30, 1977
Creator: Heck, F. M.; Schultz, J. H. & Smeltzer, G. S.
Partner: UNT Libraries Government Documents Department
open access

Computer code for the costing and sizing of TNS tokamaks

Description: A FORTRAN code for the COsting And Sizing of Tokamaks (COAST) is described. The code was written to conduct detailed analyses on the engineering features of the next tokamak fusion device following TFTR. The ORNL/Westinghouse study of TNS (The Next Step) has involved the investigation of a number of device options, each over a wide range of plasma sizes. A generalized description of TNS is incorporated in the code and includes refined modeling of over forty systems and subsystems. Considerable … more
Date: September 30, 1977
Creator: Sink, D. A. & Iwinski, E. M.
Partner: UNT Libraries Government Documents Department
open access

Recent advances in near-term laser-fusion target design

Description: Advances in near-term laser-driven fusion pellet design are described. We report the addition of angle dependent absorption and the introduction of a new formulation of the ponderomotive force. The first application of the Incomplete Cholesky-Conjugate Gradient iterative matrix solution method to the LASNEX radiation diffusion package is discussed. A brief overview of experimental results relevant to target simulation is given. We compare LASNEX calculations with recently published Soviet pelle… more
Date: August 30, 1977
Creator: Mead, W.C.
Partner: UNT Libraries Government Documents Department
open access

Geophysical assessment of near-field ground motion and the implications for the design of nuclear installations

Description: This paper gives an in-depth discussion on the various methodologies currently available to predict the near-field ground motion from an earthquake. The limitations of the various methods are discussed in some detail in light of recently available data. It is shown that, (at least for California earthquakes) for an earthquake with a given magnitude a wide variation in the peak ground motion can occur. The change in the spectral content of the ground motion is given as a function of earthquake m… more
Date: September 30, 1977
Creator: Bernreuter, D.L.
Partner: UNT Libraries Government Documents Department
open access

Physics of tritium breeding as a geometric programming problem

Description: Tritium breeding in a fusion-fission tokamak reactor is optimized by the technique of geometric programming. The neutronic processes are represented as an objective function found by fitting a generalized quadratic function of the zone widths to the breeding ratio found from planned computational experiments. The results of this technique are examined, and the predicted performance compared to neutronic calculations with the optimized values of the design variables.
Date: September 30, 1977
Creator: Jedruch, J. & Howland, H. R.
Partner: UNT Libraries Government Documents Department
open access

Solar crop drying conference. Proceedings

Description: Thirteen papers are included. Three were represented by extended abstracts and are listed by title. Separate abstracts were prepared for ten papers. (MHR)
Date: June 30, 1977
Creator: Butler, J.L. (comp.)
Partner: UNT Libraries Government Documents Department
open access

Important aspects of radiation shielding for fusion reactor tokamaks

Description: Radiation shielding is a key subsystem in tokamak reactors. Design of this shield must evolve from economic and technological trade-off studies that account for the strong interrelations among the various components of the reactor system. These trade-offs are examined for the bulk shield on the inner side of the torus and for the special shields of major penetrations. Results derived are applicable for a large class of tokamak-type reactors.
Date: April 30, 1977
Creator: Abdou, M. A.
Partner: UNT Libraries Government Documents Department
open access

LLL development of a combined etch track: albedo dosimeter

Description: The addition of polycarbonate sheet to albedo detectors for electrochemical etching provides a simple, inexpensive way to reduce the spectral sensitivity of the personnel dosimeter without losing the albedo features of sensitivity and ease of automation. The ECEP technique also provides the dosimetrist with the potential for identifying conditions of body orientation that might otherwise lead to significant error in dosimeter evaluation.
Date: June 30, 1977
Creator: Griffith, R. V.; Fisher, J. C. & Harder, C. A.
Partner: UNT Libraries Government Documents Department
open access

Intense Pulsed Ion Neutral Source (IPINS)

Description: An Intense Pulsed Ion Neutral Source (IPINS) is being developed for injection into a mirror confinement experiment. The ion source is based on the reflex triode principle. The parameters achieved in current small-scale experiments are pulse duration 1 ..mu..s, beam energy 80 keV, and ion current density approximately 0.2 kA/cm/sup 2/. Beam neutralization using thin carbon foils is under investigation.
Date: September 30, 1977
Creator: Prono, D. S.; Ishizuka, H. & Briggs, R. J.
Partner: UNT Libraries Government Documents Department
open access

Long Range Imaginary Optical Potential in Elastic Scattering. [Cross Sections, 48 Mev]

Description: The long range imaginary optical potential arising from quadrupole Coulomb excitation is derived in closed form. An analytical closed form for elastic scattering is obtained by inserting this potential into a weak absorption modified form of Frahn's strong absorption model.
Date: September 30, 1977
Creator: Baltz, A. J.; Kauffmann, S. K.; Glendenning, N. K. & Pruess, K.
Partner: UNT Libraries Government Documents Department
open access

Remote Disassembly of Radioactively Contaminated Vessels by Means of an Arc Saw

Description: The arc saw, a newly developed tool, is a toothless circular saw which cuts by means of an electric arc. Cutting speeds between 20 to 30 cm/sup 2//S and depths up to 45 cm are possible. There is no mechanical contact between blade and work piece, no binding, and no blade breakage. The arc saw will be applied to the rapid and remote disassembly of multiple ton, contaminated stainless steel vessels.
Date: June 30, 1977
Creator: Beitel, G. A.
Partner: UNT Libraries Government Documents Department
open access

Engineering Parameters for Four Ignition TNS Tokamak Reactor Systems

Description: The ORNL/Westinghouse program for The Next Step (TNS) tokamak beyond TFTR has examined a large number of potential configurations for D-T burning ignition tokamak systems. An objective of this work has been to quantify the trade-offs associated with the assumption of certain plasma physics criteria and toroidal field coil technologies. Four tokamak system point designs are described, each representative of the TF coil technologies considered, to illustrate the engineering features associated wi… more
Date: September 30, 1977
Creator: Varljen, T. C.; Gibson, G.; French, J. W. & Heck, F. M.
Partner: UNT Libraries Government Documents Department
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