A summary is presented on high intensity radiation chemistry primarily dealing with the application of the fission fragment energy to gaseous systems. Experimental results of this high-intensity radiation on nitrogen--oxygen mixtures, the nitrogen oxides and the carbon oxides in static systems are enummerated. From the results, the kinetics and mechanisms of the reactions are described. Extrapolation from static to a loop experiment which cycles nitrogen-- oxygen mixtures over enriched uranium bearing glass fibers within a nuclear reactor has been accomplished. Design and economic features of chemonuclear reactors derived from the static and loop experiments are reported. (auth)