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  • NUCLEAR AND HIGH-ENERGY PHYSICS  (5)
  • 1
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    Fissioning uranium plasmas and nuclear-pumped lasers (1975)
    In:  Other Sources
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    Publication Date: 2019-08-13
    Description: Current research into uranium plasmas, gaseous-core (cavity) reactors, and nuclear-pumped lasers is discussed. Basic properties of fissioning uranium plasmas are summarized together with potential space and terrestrial applications of gaseous-core reactors and nuclear-pumped lasers. Conditions for criticality of a uranium plasma are outlined, and it is shown that the nonequilibrium state and the optical thinness of a fissioning plasma can be exploited for the direct conversion of fission fragment energy into coherent light (i.e., for nuclear-pumped lasers). Successful demonstrations of nuclear-pumped lasers are described together with gaseous-fuel reactor experiments using uranium hexafluoride.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: Nuclear Technology; 27; Sept
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Gaseous fuel nuclear reactor research (1975)
    In:  Other Sources
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    Publication Date: 2019-08-13
    Description: Gaseous-fuel nuclear reactors are described; their distinguishing feature is the use of fissile fuels in a gaseous or plasma state, thereby breaking the barrier of temperature imposed by solid-fuel elements. This property creates a reactor heat source that may be able to heat the propellant of a rocket engine to 10,000 or 20,000 K. At this temperature level, gas-core reactors would provide the breakthrough in propulsion needed to open the entire solar system to manned and unmanned spacecraft. The possibility of fuel recycling makes possible efficiencies of up to 65% and nuclear safety at reduced cost, as well as high-thrust propulsion capabilities with specific impulse up to 5000 sec.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: Energy - Engineering - Environment; Seventh Annual Frontiers of Power Technology Conference, Stillwater; Oct 09, 1974 - Oct 10, 1974; Stillwater, OK
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    NASA TECHNICAL REPORTS
  • 3
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    Gaseous fuel reactor systems for aerospace applications (1977)
    In:  Other Sources
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    Publication Date: 2019-08-27
    Description: Research on the gaseous fuel nuclear rocket concept continues under the programs of the U.S. National Aeronautics and Space Administration (NASA) Office for Aeronautics and Space Technology and now includes work related to power applications in space and on earth. In a cavity reactor test series, initial experiments confirmed the low critical mass determined from reactor physics calculations. Recent work with flowing UF6 fuel indicates stable operation at increased power levels. Preliminary design and experimental verification of test hardware for high-temperature experiments have been accomplished. Research on energy extraction from fissioning gases has resulted in lasers energized by fission fragments. Combined experimental results and studies indicate that gaseous-fuel reactor systems have significant potential for providing nuclear fission power in space and on earth.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: AIAA PAPER 77-513 , Conference on the Future of Aerospace Power Systems; Mar 01, 1977 - Mar 03, 1977; St. Louis, MO
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    NASA TECHNICAL REPORTS
  • 4
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    Non-equilibrium radiation nuclear reactor (1978)
    In:  CASI
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    Publication Date: 2019-08-28
    Description: An externally moderated thermal nuclear reactor is disclosed which is designed to provide output power in the form of electromagnetic radiation. The reactor is a gaseous fueled nuclear cavity reactor device which can operate over wide ranges of temperature and pressure, and which includes the capability of processing and recycling waste products such as long-lived transuranium actinides. The primary output of the device may be in the form of coherent radiation, so that the reactor may be utilized as a self-critical nuclear pumped laser.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
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    NASA TECHNICAL REPORTS
  • 5
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    Gaseous fuel reactor research (1977)
    In:  Other Sources
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    Publication Date: 2019-08-28
    Description: The paper reviews studies dealing with the concept of a gaseous fuel reactor and describes the structure and plans of the current NASA research program of experiments on uranium hexafluoride systems and uranium plasma systems. Results of research into the basic properties of uranium plasmas and fissioning gases are reported. The nuclear pumped laser is described, and the main results of experiments with these devices are summarized.
    Keywords: NUCLEAR AND HIGH-ENERGY PHYSICS
    Type: IEEE Transactions on Plasma Science; PS-5; Dec. 197
    Format: text
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    NASA TECHNICAL REPORTS
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