reacting spent nuclear fuel in a voloxidation vessel with an oxidizing gas comprising nitrogen dioxide and {TAIL ~ oxygen} for a period sufficient to generate a solid oxidation product of {HEAD ~ said spent nuclear fuel}, wherein said reacting step comprises: 
reacting spent nuclear fuel in a voloxidation vessel with an oxidizing gas comprising nitrogen dioxide and { TAIL ~ oxygen } for a period sufficient to generate a solid oxidation product of { HEAD ~ said spent nuclear fuel } , wherein said reacting step comprises :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH