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Vapor-Liquid Equilibria for Nitric Acid-Water and Plutonium Nitrate-Nitric Acid-Water Solutions.

UCID18148

Publication Date	1980
Personal Author	Maimoni, A.
Page Count	64
Abstract	The liquid-vapor equilibrium data for nitric acid and nitric acid-plutnonium nitrate-water solutions were examined to develop correlations covering the range of conditions encountered in nuclear fuel reprocessing. The scanty available data for plutonium nitrate solutions are of poor quality but allow an order of magnitude estimate to be made. A formal thermodynamic analysis was attempted initially but was not successful due to the poor quality of the data as well as the complex chemical equilibria involved in the nitric acid and in the plutonium nitrate solutions. Thus, while there was no difficulty in correlating activity coefficients for nitric acid solutions over relatively narrow temperature ranges, attempts to extend the correlations over the range 25 exp 0 C to the boiling point were not successful. The available data were then analyzed using empirical correlations from which normal boiling points and relative volatilities can be obtained over the concentration ranges 0 to 700 g/l Pu, 0 to 13 M nitric acid. Activity coefficients are required, however, if estimates of individual component vapor pressures are needed. The required ternary activity coefficients can be approximated from the correlations. (ERA citation 05:035255)
Keywords	Nitric acid Plutonium nitrates Aqueous solutions Equilibrium Evaporation Liquids Medium temperature Vapors Volatility Water ERDA/400702 ERDA/050800 ERDA/055001
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	77I - Reactor Fuels & Fuel Processing 99 - Chemistry
Corporate Authors	California Univ., Livermore. Lawrence Livermore Lab.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	198104
Contract Number	W-7405-ENG-48

Vapor-Liquid Equilibria for Nitric Acid-Water and Plutonium Nitrate-Nitric Acid-Water Solutions.

Vapor-Liquid Equilibria for Nitric Acid-Water and Plutonium Nitrate-Nitric Acid-Water Solutions.
UCID18148

Publication Date	1980
Personal Author	Maimoni, A.
Page Count	64
Abstract	The liquid-vapor equilibrium data for nitric acid and nitric acid-plutnonium nitrate-water solutions were examined to develop correlations covering the range of conditions encountered in nuclear fuel reprocessing. The scanty available data for plutonium nitrate solutions are of poor quality but allow an order of magnitude estimate to be made. A formal thermodynamic analysis was attempted initially but was not successful due to the poor quality of the data as well as the complex chemical equilibria involved in the nitric acid and in the plutonium nitrate solutions. Thus, while there was no difficulty in correlating activity coefficients for nitric acid solutions over relatively narrow temperature ranges, attempts to extend the correlations over the range 25 exp 0 C to the boiling point were not successful. The available data were then analyzed using empirical correlations from which normal boiling points and relative volatilities can be obtained over the concentration ranges 0 to 700 g/l Pu, 0 to 13 M nitric acid. Activity coefficients are required, however, if estimates of individual component vapor pressures are needed. The required ternary activity coefficients can be approximated from the correlations. (ERA citation 05:035255)
Keywords	Nitric acid Plutonium nitrates Aqueous solutions Equilibrium Evaporation Liquids Medium temperature Vapors Volatility Water ERDA/400702 ERDA/050800 ERDA/055001
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	77I - Reactor Fuels & Fuel Processing 99 - Chemistry
Corporate Authors	California Univ., Livermore. Lawrence Livermore Lab.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	198104
Contract Number	W-7405-ENG-48