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HAO Shao-chang, ZHOU Xiang-wen, ZHAO Xing-yu, MA Jing-tao, WANG Yang, DENG Chang-sheng, TANG Ya-ping. U3O8 Acid-Deficient Dissolution Process for Preparation of UO2 Kernels by Sol-Gel Method[J]. Atomic Energy Science and Technology, 2013, 47(1): 34-37. DOI: 10.7538/yzk.2013.47.01.0034
Citation: HAO Shao-chang, ZHOU Xiang-wen, ZHAO Xing-yu, MA Jing-tao, WANG Yang, DENG Chang-sheng, TANG Ya-ping. U3O8 Acid-Deficient Dissolution Process for Preparation of UO2 Kernels by Sol-Gel Method[J]. Atomic Energy Science and Technology, 2013, 47(1): 34-37. DOI: 10.7538/yzk.2013.47.01.0034
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U3O8 Acid-Deficient Dissolution Process for Preparation of UO2 Kernels by Sol-Gel Method

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  • Uranyl nitrate solution with high uranium concentration and hypostoichiometric c(NO3-)/c(U) ratio (the stoichiometric ratio of c(NO3-)/c(U) is 2 in standard uranyl nitrate solution) is crucial for preparation of qualified UO2 kernels for high temperature gas-cooled reactor. An acid-deficient dissolution process was developed for the preparation of uranyl nitrate solution. In the process the raw materials U3O8 was added stepwise and the heating for the process was controlled in stages. Uranyl nitrate solutions with c(U)＝2.1-2.5 mol/L, c (NO3-)/c(U)＝1.6-1.8 and pH>1.4 could be prepared. A relationship between solution density and uranium concentration was summarized.
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