This　paper　reports　the　effect　of　HNO3　on　radiation　stability　and　radiolysis　product　of　N,N-Diethylhydroxylamine　(DEHA),　which　is　used　as　a　reducer　in　the　reprocessing　of　spent　fuel.　Results　show　that　with　the　addition　of　HNO3,　radiation　stability　of　DEHA　is　weakened　obviously,　the　volume　fraction　of　H-2,　CH4　and　C2H4　decreases　but　the　concentration　of　CH3COOH　increases.　As　to　1.0　and　2.0　M　HNO3,　the　concentration　of　CH3CHO　increases,　but　it　decreases　when　HNO3　is　3.0　M.　(C)　2009　Published　by　Elsevier　Ltd.