NOVELTY - System (100) comprises reactor (102) including solution inlet port (106) and hydrogen outlet port (108); reactant fuel material (101) added to reactor; water feed system with spring and solution chamber, where spring imparts a force on solution chamber to pressurize and deliver aqueous solution via solution inlet fill port (110) to reactant fuel material in the reactor to generate hydrogen gas to be routed via hydrogen outlet port to industrial application.    USE - For generating hydrogen gas; used in fuel cells, in commercial and industrial applications, laboratory applications and consumer applications.    ADVANTAGE - The system does not require additional catalyst chamber, and is easily start-stop controlled by the simple addition of aqueous medium to satisfy the hydrogen demand of fuel cell or hydrogen-drawing system; thus minimizing overall system volume and weight. The reactor can include hydrogen handling components such as safety relief mechanism e.g. relief valve, burst disc or controlled reactor burst point. The reactor can also include exit flow limiter to minimize or control the hydrogen output rate in order to supply required fuel cell characteristic or to match the transient flow rate limitations of the filtration components.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method of generating hydrogen gas involving inserting a reactant material into reactor; imparting force on solution chamber with spring to pressurize an aqueous solution in solution chamber; delivering pressurized aqueous solution with water feed system via solution inlet fill port to reactant material in reactor to generate hydrogen gas; and routing generated hydrogen gas from reactor via hydrogen outlet port to industrial application.    DESCRIPTION OF DRAWING(S) - The figure shows schematic diagram of hydrogen generation system.    Hydrogen generation system (100)    Reactant fuel material (101)    Reactor (102)    Water inlet port (106)    Hydrogen outlet port (108)    Fill port (110)