Induced nuclear reactions: processes – systems – and elements – Nuclear fusion – Pellet guidance systems
Patent
1988-09-22
1990-02-27
Behrend, Harvey E.
Induced nuclear reactions: processes, systems, and elements
Nuclear fusion
Pellet guidance systems
376916, 264 05, 264 28, 264 81, 425143, 425160, 425437, G21B 100
Patent
active
049044419
ABSTRACT:
A pellet injector for injecting pellets of condensed gas, such as hydrogen, tritium or deuterium, into a reactor comprises an arrangement of pipe guns in a cylindrical arrangement. Each pipe gun which may be made from stainless steel, has a freezing section and three axially spaced metal rings of a heat conductive metal arranged in good thermal contact with the outer surface of the pipe gun at the freezing section thereof. Each of the rings is thermally connected to a cryostat, for example by means of a copper wire. The center ring is cooled to a temperature below the condensing temperature of the gas so as to condense the gas in the freezing section of the pipe gun to form a pellet therein, and the temperature of the adjacent outer rings are maintained at temperatures exceeding the temperature of the center ring so as to obtain a pellet of a desired size. The pellets formed in the pipe guns may be expelled therefrom by a pressurized gas force pulse and injected into a reactor. The pressurized gas force pulse may be provided by using a special solenoid valve.
REFERENCES:
patent: 3626046 (1971-12-01), Krause et al.
patent: 3723246 (1973-03-01), Lubin
Fusion Technology, vol. 6, 9/84, pp. 378-383, Sorensen et al.
LA-UR-74-245, 2/74, Durham, pp. 12, 58.
"Deuterium Pellet Injection in the TFR Tokamak", Olivier Lazare, pub. 1 Jul. 1985, University of Paris.
"Fast Opening Magnetic Valve for High-Pressure Gas Injection . . . ", Rev. Sci. Instrum., 57 (9), Sep. 1986.
"Simple Pipe-Gun for Hydrogen Pellet Injection", Rev. Sci. Instrum., 57 (10), Oct. 1986.
"Acceleration and Injection of D2 Pellets", Fusion Technology 1980, 15-19, Sep. 1980.
"Experiment Test of 6 mm Diameter D2 Pellets Produced by . . . ", Fusion Technology 1986, 8-12, Sep. 1986.
Saas Bjarne
Sorensen Hans
Weisberg Knud V.
Behrend Harvey E.
Forskningscenter Riso
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