A reactor block to extract hydrogen from water includes a plurality of reactor plates bonded to one another and a plurality of channels formed on at least one side of each reactor plate. Each channel is coupled to a first opening and a second opening disposed on opposite first and second edges of the reactor plate, and a radioactive coating is applied to each channel. The first opening is configured to receive gasified water and the second opening is configured to eject hydrogen generated by radiolysis of at least a portion of the gasified water as the gasified water is passed through the channel coupled to the second opening.