Although the nitration step can be separate from the voloxidation step, the nitration step can include contacting the solid oxidation product 30, or the spent nuclear fuel 26 in the second zone 16 of the voloxidizer 12, with {HEAD ~ a nitration gas} comprising {TAIL ~ nitrogen dioxide} for a period sufficient to produce a nitration product 
Although the nitration step can be separate from the voloxidation step , the nitration step can include contacting the solid oxidation product 30 , or the spent nuclear fuel 26 in the second zone 16 of the voloxidizer 12 , with { HEAD ~ a nitration gas } comprising { TAIL ~ nitrogen dioxide } for a period sufficient to produce a nitration product
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