Abstract: A submersible, single phase electromagnetic pumping assembly (10) for liquid metal is made, which contains a submersible pump section (16) and a nonsubmersible pump section (18) connected by a hollow conduit (20) where single phase electromagnetic windings (22 and 24) are disposed in each pump section, providing a two stage pumping assembly, and an eddy current blocking electromagnetic winding (22 and 24), providing liquid flow orifices unoccupied by the structure within each pump section near the winding, and where the single phase coils can create a pulsed, standing magnetic wave within each liquid flow orifice.

Abstract: A flow characteristic regulating electromagnetic flow coupler is disclosed as comprising a pump duct and a generator duct for connection in separate flow circuits containing electrically conductive fluid. Circuit means electrically connect the separate fluid in each of the pump and generator ducts for conducting electric current through the fluid in each of the pump and generator ducts transversely of the fluid flow therethrough. Means are provided for applying respectively first and second magnetic fields through the fluids of the generator and pump ducts transversely of the current and fluid flow therethrough, whereby the fluid driven through the generator duct forces the fluid to flow through the pump duct.

Abstract: The electromagnetic flow coupler comprises substantially electrically insulated side walls for minimizing parasitic losses in the side walls. The side walls may comprise alumina plates attached to conductive members with thin stainless steel plates disposed on the inside walls of the alumina plates for reducing the flow of electricity through the side walls of the flow coupler.

Abstract: A sodium storage and injection system for delivering atomized liquid sodium to a chemical reactor employed in the production of solar grade silicon. The system is adapted to accommodate start-up, shut-down, normal and emergency operations and is characterized by a jacketed injection nozzle adapted to atomize liquefied sodium and a supply circuit connected to the nozzle for delivering thereto liquefied sodium comprising a plurality of replaceable sodium containment vessels, a pump interposed between the vessels and the nozzle, and a pressurizing circuit including a source of inert gas connected with the vessels for maintaining the sodium under pressure.

Abstract: A passive decay heat removal system in which gas pressurization of a gap between the double walls of heat exchanger tubes initiates heat removal by triggering an increase in tube heat conductivity.