Batch Crystallization of Uranyl Nitrate

Batch crystallization of uranyl nitrate is carried out in order to obtain fundamental data required for the development of reprocessing involving crystallization. Particular attention is paid to the development of a method for predicting the concentrations of uranium and nitric acid in the mother li...

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Published in:Journal of nuclear science and technology 2008-06, Vol.45 (6), p.582-587
Main Authors: CHIKAZAWA, Takahiro, KIKUCHI, Toshiaki, SHIBATA, Atsuhiro, KOYAMA, Tomozo, HOMMA, Shunji
Format: Article
Language:English
Subjects:
Crystallization
Dissolvers
Mathematical analysis
Nitrates
Nitric acid
Reprocessing
Solubility
Uranium
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container_issue 6
container_start_page 582
container_title Journal of nuclear science and technology
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creator CHIKAZAWA, Takahiro
KIKUCHI, Toshiaki
SHIBATA, Atsuhiro
KOYAMA, Tomozo
HOMMA, Shunji
description Batch crystallization of uranyl nitrate is carried out in order to obtain fundamental data required for the development of reprocessing involving crystallization. Particular attention is paid to the development of a method for predicting the concentrations of uranium and nitric acid in the mother liquor and the amount of uranyl nitrate crystals produced. Initial concentrations of uranyl nitrate and nitric acid are 500-600 g/l and 4-6 mol/l, respectively, corresponding to the condition of a dissolver solution of spent fuel. Steady-state mass balance equations including the correlation equation for the equilibrium solubility of uranium nitrate are applied to the prediction. The calculated concentrations of uranium and nitric acid are in close agreement with the experimental ones. The recovery of uranium is accurately predicted by the calculated concentrations, with an error of less than 10%.
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source Taylor and Francis Science and Technology Collection
subjects Crystallization
Dissolvers
Mathematical analysis
Nitrates
Nitric acid
Reprocessing
Solubility
Uranium
title Batch Crystallization of Uranyl Nitrate
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