NOVELTY - A cold chemical water-splitting hydrogen generation system comprises a Raney Nickel assembly (12) in a water-splitting reaction tank (11), a tank shelf (14) welded to the water-splitting reaction tank, a reactor cap (15) with a hydrogen outlet at its top, and a water supply opening (17) located between the tank shelf and the reactor cap.    USE - The system is used for generating hydrogen and oxygen used in fuel cells to generate electricity used for on-board usages, e.g. automobiles and laptop computers, as wells as for large utility power stations.    ADVANTAGE - The single reactor system requires no recycling of the iodine and the sulfur dioxide as the catalysts for the continuance of the hydrogen generation process; requires no gas separation devices; and uses water as raw material that is cheap, abundant, renewable, and requires no special process to extract and produce. The raw material can be delivered with the existing infra-structure, and is inert, stable, and nonflammable. It produces no environment harmful byproducts. The system can provide energy economically for systems as large as a utility power station and as small as laptop computer. It requires no storage, transport, and delivery system to its end users; and requires minimum external energy inputs to dissociate water into hydrogen and oxygen, thus minimizing the production cost for hydrogen production. No external heat is required to promote the chemical reactions for hydrogen production, thus reducing the operational hazards. Catalysts are retained and reused in the chemical reaction chamber, so that the cost of hydrogen production is minimized. The number of chemical reaction steps is minimized to maximize the hydrogen production efficiency and economy. Minimum gas separation measures are required to minimize hydrogen production cost.    DESCRIPTION OF DRAWING(S) - The figure is a vertical sectional view of the hydrogen generation reactor.    Water-splitting reaction tank (11)    Raney nickel assembly (12)    Tank shelf (14)    Reactor cap (15)    Water supply opening (17)