Mit Kernkraft betriebener magnetohydrodynamischer Wechselstromgenerator

954,928. Generators operating by electromagnetic interaction with fluids. UNITED AIRCRAFT CORPORATION. Aug. 31, 1961 [Sept. 12, 1960], No. 31420/61. Heading H2A. [Also in Divisions F1 and G6] The electrical conductivity of gas containing fissionable material flowing, in the presence of a steady magnetic field 18, through duct 14 of a magnetohydrodynamic generator is cyclically varied by altering the position of moderator 22, 24 by rotating cam 30 to generate a pulsating voltage at electrodes 26, 27 which may be applied to load 40 via transformer 28. The moderator which may be mounted at the edge of wheels running adjacent the duct, Figs. 3, 4 (not shown), or formed together with a neutron-absorbing material as composite rods which rotate, Figs. 7, 8 (not shown), and allow the nuclear reaction within the duct to alternately start and stop to produce the required output waveform. In modifications only part of the moderator mass is oscillated, Fig. 2 (not shown), or an additional pulsating magnetic field perpendicular to the main flux may be provided, Fig. 6 (not shown). In a system for generating power the hot gaseous working fluid leaves duct 14 and passes through heat exchanger 48 and turbine 50 which drives a pump 52 to condenser 54, where it is cooled to its initial liquid or gaseous state, and is then preheated in heat exchanger 48 before passing back to the duct inlet 12. Specification 928,836 is referred to.