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Conditioning of the vacuum vessel walls of tokamaks, a preliminary look

Description: The main features and operating characteristics of the primary vacuum system of many of the presently operating tokamak devices are presented. Particular attention is paid to the methods used to condition and clean the vessel walls in situ. For the devices discussed, a combination of a high-temperature bakeout and/or discharge cleaning is employed. In addition, discussions of the vacuum systems and wall conditioning methods anticipated for the next generation of tokamaks are presented. Since th… more
Date: March 1, 1976
Creator: Sink, D.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Considerations of the social impact of fusion power

Description: It is concluded that the direct effects of an ideal form of fusion technologies would be socially more desirable than those of the alternatives. This is particularly true of the second generation fusion power plant. However, given our technological inputs, this was a trivial result. Less trivial was consideration of the negative effects that might accrue through the availability of potentially unlimited supplies of low cost energy. It is concluded that while there may be reasonable humanist arg… more
Date: September 1, 1976
Creator: Gastil, R. D. & Markus, H. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Superconductor design study. Final report. [Composite conductor research for carrying 10,000 A at 12T]

Description: The objective of this program was to continue the developmental effort aimed toward production of a composite conductor capable of carrying 10,000 A at 12 T and suitable for use in large fusion magnets. This program pertains specifically to the development of Nb/sub 3/Sn multifilamentary conductors containing tubular Nb filaments with Cu-Sn alloy cores in a high conductivity copper matrix. The specific tasks include: (1) Fabricate 1000 ft of 1000 A, 12 T conductor for coil evaluation. (2) Fabri… more
Date: April 1, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Biological effects of activation products and other chemicals released from fusion power plants

Description: Literature reviews indicate that existing information is incomplete, often contradictory, and of questionable value for the prediction and assessment of ultimate impact from fusion-associated activation products and other chemical releases. It is still uncertain which structural materials will be used in the blanket and first wall of fusion power plants. However, niobium, vanadium, vanadium-chromium alloy, vanadium-titanium alloy, sintered aluminum product, and stainless steel have been suggest… more
Date: September 1, 1976
Creator: Strand, J. A. & Poston, T. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Correlation of AES FY 1978 program with energy-related environmental research needs

Description: This report has a two-fold objective: (1) to identify major energy-related environmental concerns, needs, and problem areas, and (2) to show the relationship of the planned FY 1978 research program of the ERDA Assistant Administrator of Environment and Safety (AES) to those environmental issues. The document is organized into sections addressing each major energy form. Each section identifies environmental issues of an energy form and indicates the level of planned FY 78 AES research addressing… more
Date: August 1, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Potential for graphite use adjacent to the plasma in nuclear fusion reactors

Description: The need to reduce high Z impurities in the plasma of fusion reactors has led to various ideas, including a low-Z liner, for isolating the first structural wall from the plasma. Graphite and other carbon containing materials (most notably SiC) are strong candidate materials for such liners. However, to assess the potential of these materials will require more information on the following properties: (1) Radiation effects under fusion reactor environment, (2) Sputtering, (3) Degassing. This docu… more
Date: June 1, 1976
Creator: Gray, W. J.; Morgan, W. C. & Tingey, G. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tritium Source Terms for Fusion Power Plants

Description: The purpose of this study is to assess tritium control aspects of fusion reactors, to derive a preliminary estimate of the probable tritium releases and source terms under steady-state reactor operation, and to identify areas where advancement of fusion reactor tritium control technology will be required. Tritium release aspects of six fusion reactor conceptual designs were evaluated, including four Tokamaks, one mirror and one theta pinch reactor. The principal effort was directed to Tokamaks … more
Date: September 1, 1976
Creator: Kabele, T. J.; Johnson, A. B., (Jr.) & Mudge, L. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Deformation of liquid droplets and gas bubbles in electric fields. Research report No. 1

Description: The behavior of dielectric droplets and gas bubbles in electrostatic levitation, positioning, and control devices for laser-fusion target applications is studied. Because of the exacting tolerance requirements for the sphericity of laser fusion targets, there is concern over the electric field induced elongation effect which may exist in some or all of these schemes. These proposed tolerances suggest upper limits on the axis ratio ..gamma..: ..gamma.. - 1 < 10/sup -3/, which may severely limit … more
Date: May 1, 1976
Creator: Jones, T. B. & McCarthy, M. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Lower hybrid parametric instabilities nonuniform pump waves and tokamak applications

Description: Electrostatic lower hybrid ''pump'' waves often launched into tokamak plasmas by structures (e.g., waveguides) whose dimensions are considerably smaller than characteristic plasma sizes. Such waves propagate in well-defined resonance cones and give rise to parametric instabilities driven by electron E x B velocities. The finite size of the resonance cone region determines the threshold for both convective quasimode decay instabilities and absolute instabilities. The excitation of absolute insta… more
Date: November 1, 1976
Creator: Berger, R. L.; Chen, L.; Kaw, P. K. & Perkins, F. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nonlinear tearing modes in tokamaks

Description: Numerical codes have been developed for the description of the nonlinear evolution of tearing modes in tokamaks. The m = 1 mode is observed to continue rapid growth in the nonlinear regime, producing significant changes on a time scale consistent with the experimentally observed minor disruption. The double tearing mode associated with a hollow current profile also continues rapid growth in the nonlinear regime, and thus may play a significant role in the anomalous current penetration during th… more
Date: September 1, 1976
Creator: White, R. B.; Monticello, D. A.; Rosenbluth, M. N. & Waddell, B. V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Tritium containment and blanket design challenges for a 1 GWe mirror fusion central power station

Description: Tritium containment and removal problems associated with the blanket and power-systems for a mirror fusion reactor are identified and conceptual process designs are devised to reduce emissions to the environment below 1 Ci/day. The blanket concept development proceeds by starting with this emission goal of 1 Ci/day and working inward to the blanket. At each decision point, worker safety, operational labor costs, and capital cost tradeoffs are contrasted. The conceptual design uses air for the r… more
Date: June 1, 1976
Creator: Galloway, T. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Survey of failure experience in existing superconducting magnet systems and its relevance to fusion power reactors

Description: Details of existing superconducting magnet failures are collected and evaluated with regard to future CTR superconducting magnet safety and reliability. Fourteen magnet systems with sixteen failures are presented. These failures are analyzed and categorized as to causative factors (e.g. hot spots, arcing, lead failures, and conductor movement). Responses of the instrumentation and protection systems during these accident situations are also presented. Repairs and present status of the magnets a… more
Date: August 17, 1976
Creator: Hsieh, S Y; Allinger, J; Danby, G; Keane, J; Powell, J & Prodell, A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Reference commercial fusion power plants

Description: Currently available conceptual designs for commercial fusion power plants are for first generation plants using deuterium-tritium (D-T) fuel, and are all functionally similar. This similarity has been used as a basis for defining an envelope of D-T fusion power plant characteristics which encompasses the characteristics of the available designs. A description of this envelope, including general process descriptions, proposed materials uses and a tabulation of numerical ranges of plant parameter… more
Date: September 1, 1976
Creator: Young, J. R. & Gore, B. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mirror hybrid reactor optimization studies

Description: A system model of the mirror hybrid reactor has been developed. The major components of the model include (1) the reactor description, (2) a capital cost analysis, (3) various fuel management schemes, and (4) an economic analysis that includes the hybrid plus its associated fission burner reactors. The results presented describe the optimization of the mirror hybrid reactor, the objective being to minimize the cost of electricity from the hybrid fission-burner reactor complex. We have examined … more
Date: September 9, 1976
Creator: Bender, D. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Tokamak Experimental Power Reactor. [Conceptual design for operation at net electrical power conditions]

Description: A conceptual design has been developed for a Tokamak Experimental Power Reactor to operate at net electrical power conditions with a plant capacity factor of 50 percent for 10 yr. The EPR operates in a pulsed mode at a frequency of approximately 1/min, with an approximately 75 percent duty cycle, is capable of producing approximately 72 MWe and requires 42 MWe. The EPR vacuum chamber is 6.25 m in major radius and 2.4 m in minor radius, is constructed of 2 cm thick stainless steel, and has 2 cm … more
Date: October 1, 1976
Creator: Stacey, W. M. Jr.; Abdou, M. A. & Bertoncini, P. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Predemonstration fusion devices research and development needs

Description: The criteria and reference design information for the PDFD are examined with respect to the presently planned R and programs, and the major research and development needs are described. Emphasis remains on the fusion core rather than the nuclear shell. Scaling, heating, fueling and other needs are outlined. In the area of technology, magnet systems and tritium handling compatible with PDFD operation are discussed. Presently planned research and development programs will provide the information … more
Date: January 1, 1976
Creator: Clarke, J. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Data acquisition system for fusion diagnostics on the ARGUS laser

Description: An extensive data acquisition and analysis system has been implemented for experiments on the ARGUS laser. The system is based upon a PDP-11/40 minicomputer and CAMAC interfaces. Highspeed transient digitizers, calorimeter digitizing modules and time integrated data are interfaced through CAMAC over a fiber optic serial highway. The system allows for dynamic definition of the experimental environment by an operator, automatic data acquisition during a shot. Two interactive graphics terminals al… more
Date: September 1, 1976
Creator: Greenwood, J. R.; Campbell, D. E. & Frerking, C. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Design study of electrostatically plugged cusp fusion reactor

Description: This study concentrates on the following aspects of an electrostatically plugged cusp reactor that will be different from other fusion reactor designs: the coil geometry and structural supports, high voltage electrodes, plasma parameters, power balance, and operating cycle. Assuming the electron density distribution in the anodes to have a characteristic width of two electron Larmor radii, which is consistent with present experimental results, the theory predicts that a device with a magnetic f… more
Date: November 1, 1976
Creator: Dolan, T. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laser fusion hybrid reactor systems study

Description: The work was performed in three phases. The first phase included a review of the many possible laser-reactor-blanket combinations and resulted in the selection of a ''demonstration size'' 500 MWe plant for further study. A number of fast fission blankets using uranium metal, uranium-molybdenum alloy, and uranium carbide as fuel were investigated. The second phase included design of the reactor vessel and internals, heat transfer system, tritium processing system, and the balance of plant, exclu… more
Date: July 1, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Studies of tokamak fusion reactor dynamics. Progress report, June 1, 1975--February 15, 1976. [Plasma shape and position effects; transport theory]

Description: An investigation of the effect of plasma shape and position on the inductive coupling between the plasma and the external poloidal field coils is briefly described. Research on a multi-node time-dependent point kinetics code with which to study the operating dynamics of a tokamak reactor is also mentioned. (MOW)
Date: January 1, 1976
Creator: Mills, R. G. & Gralnick, S. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Coalescence instability of magnetic islands

Description: The stability of a periodic magnetic island structure was studied using the ideal MHD equations. An instability is found which describes the tendency toward coalescence of parallel currents in the neighboring islands. It is expected that this instability will proceed at a fast MHD rate as long as the forces driving the instability can overcome the stabilizing forces due to the compression of the magnetic field between the islands. Beyond that phase, resistivity is expected to dominate the tende… more
Date: March 1, 1976
Creator: Finn, J. M. & Kaw, P. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fusion reactor wastes

Description: The potential waste releases for commercial fusion power plants were estimated by use of standard environmental analysis procedures incorporating a high degree of speculation. The analytical procedure is presented. A description was obtained for each of the ten fusion power plant concepts currently being developed. These concepts were then analyzed to determine the general characteristics and probable waste releases. (MOW)
Date: September 1, 1976
Creator: Young, J R
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Study of efficient high-power, high-energy neutral beams for the Reference Mirror Reactor

Description: An injector design for the Reference Mirror Reactor is described which uses negative ions created by charge-exchange in a cesium vapor cell and neutralized by photodetachment. Some of the innovations discussed include a continuously operating cathode for an LBL/LLL ion source, a negative ion beam line with cooled grids, a high voltage accelerator configuration with insulators shielded from the neutron and gamma flux, and cryopanels which continuously cycle between pumping and outgassing modes.
Date: November 11, 1976
Creator: Fink, J. H.; Barr, W. L. & Hamilton, G. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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