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Dissolution of Plutonium Oxide in Nitric Acid at High Hydrofluoric Acid Concentrations.

DE84015142

Publication Date	1984
Personal Author	Kazanjian, A. R.; Stevens, J. R.
Page Count	10
Abstract	The dissolution of plutonium dioxide in nitirc acid (HNO sub 3 ) at high hydrofluoric acid (HF) concentrations has been investigated. Dissolution rate curves were obtained using 12M HNO sub 3 and HF at concentrations varying from 0.05 to 1.0 molar. The dissolution rate increased with HF concentration up to 0.2M and then decreased at higher concentrations. There was very little plutonium dissolved at 0.7 and 1.0M HF because of the formation of insoluble PuF sub 4 . Various oxidizing agents were added to 12M HNO sub 3 -1M HF dissolvent to oxidize Pu(IV) to Pu(VI) and prevent the formation of PuF sub 4 . Ceric (Ce(IV)) and silver (Ag(II)) ions were the most effective in dissolving PuO sub 2 . Although these two oxidants greatly increased the dissolution rate, the rates were not as rapid as those obtained with 12M HNO sub 3 -0.2M HF. (ERA citation 09:035198)
Keywords	Plutonium Dioxide Cerium Compounds Dissolution Hydrofluoric Acid Nitric Acid Oxidizers Silver Compounds ERDA/050800
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	77I - Reactor Fuels & Fuel Processing
Corporate Authors	Rockwell International, Golden, CO. Rocky Flats Plant.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	198424
Contract Number	AC04-76DP03533

Dissolution of Plutonium Oxide in Nitric Acid at High Hydrofluoric Acid Concentrations.

Dissolution of Plutonium Oxide in Nitric Acid at High Hydrofluoric Acid Concentrations.
DE84015142

Publication Date	1984
Personal Author	Kazanjian, A. R.; Stevens, J. R.
Page Count	10
Abstract	The dissolution of plutonium dioxide in nitirc acid (HNO sub 3 ) at high hydrofluoric acid (HF) concentrations has been investigated. Dissolution rate curves were obtained using 12M HNO sub 3 and HF at concentrations varying from 0.05 to 1.0 molar. The dissolution rate increased with HF concentration up to 0.2M and then decreased at higher concentrations. There was very little plutonium dissolved at 0.7 and 1.0M HF because of the formation of insoluble PuF sub 4 . Various oxidizing agents were added to 12M HNO sub 3 -1M HF dissolvent to oxidize Pu(IV) to Pu(VI) and prevent the formation of PuF sub 4 . Ceric (Ce(IV)) and silver (Ag(II)) ions were the most effective in dissolving PuO sub 2 . Although these two oxidants greatly increased the dissolution rate, the rates were not as rapid as those obtained with 12M HNO sub 3 -0.2M HF. (ERA citation 09:035198)
Keywords	Plutonium Dioxide Cerium Compounds Dissolution Hydrofluoric Acid Nitric Acid Oxidizers Silver Compounds ERDA/050800
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	77I - Reactor Fuels & Fuel Processing
Corporate Authors	Rockwell International, Golden, CO. Rocky Flats Plant.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	198424
Contract Number	AC04-76DP03533