Abstract: Enhanced containment, capture, transfer, and storage of hydrogen gas in sealed enclosures is achieved using multi-layered materials comprising polymer(s), metal(s), metal alloy(s) and/or metal oxide(s) that either form, line, or coat the wall(s) of the sealed enclosures. These composite materials decrease “loss” of hydrogen gas by combining equilibrium and kinetic barriers to hydrogen diffusion. Capture and separation of gaseous hydrogen permeating through the wall(s) of an enclosure is accomplished by trapping the gas in either one or more internal liquid layers, or in one or more attached, gas-tight covers. Tightly packed sets of sealed enclosures, especially pipes or tubes with one or more polymer/metal±metal oxide/liquid layers or interlayers can be placed in hydrogen “warehouses” and/or “silos” to provide seasonally firmed supplies of hydrogen gas to local or city-gate markets.

Abstract: A hydrogen fueling system uses solid and/or liquid material(s) to create hydrogen-bearing gas inside one or more fuel compartments. A fuel compartment may be of any size or shape, and its wall(s) may be single- or multi-layered, and of any total thickness. Solid, liquid, and/or gaseous material(s) may flow through one or more entry/exit ports in an individual compartment, or in two or more compartments. If the fueling system contains two or more compartments, material(s) may flow into, or out of, individual compartments in series or in parallel—e.g., sequentially or simultaneously, and hydrogen-bearing gas may flow from one compartment to another. However, solids and liquids do not flow between individual compartments. Hydrogen-bearing gas may be produced inside a compartment by: a reduction in gas pressure, creation of heat from one or more internal or external sources, and/or the occurrence of one or more chemical reactions.

Abstract: A target for the reduction of fission product Mo-99 is prepared from uranium of low U-235 enrichment by coating a structural support member with a preparatory coating of a substantially oxide-free substrate metal. Uranium metal is electrodeposited from a molten halide electrolytic bath onto a substrate metal. The electrodeposition is performed at a predetermined direct current rate or by using pulsed plating techniques which permit relaxation of accumulated uranium ion concentrations within the melt. Layers of as much as to 600 mg/cm.sup.2 of uranium can be prepared to provide a sufficient density to produce acceptable concentrations of fission product Mo-99.