高放玻璃固化体深地质处置过程中溶解机理分析与计算

RADIATION PROTECTION ›› 2016, Vol. 36 ›› Issue (1): 7-13.

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Mechanism analysis and calculation of vitrified HLW dissolution due to ground water erosion in the process of geological disposal

Li Honghui¹, Li Peng², Cui Zengqi³, Wan Yaping³, Jia Meilan¹, Liu Jianqin¹, Zhao Shuaiwei¹, Mao Liang¹, Liu Wei¹

1. China Institute for Radiation Protection, CNNC Key Laboratory on Geological Disposal of High-level Radioactive Waste, Taiyuan 030006;
2. Taiyuan University of Technology and Science, Taiyuan 030024;
3. University of South China, Hunan Henyang 421001

Received:2015-03-25 Online:2016-01-20 Published:2021-11-12

Abstract

Abstract: The mechanism of vitrified HLW dissolution due to ground water erosion in the process of geological disposal is analyzed. Through hydrolysis reaction kinetics, dissolution rate of vitrified HLW is calculated with different temperatures and pH values, which comes out that dissolution rate is about 0.35 g/a with 60 ℃ and pH 6, while dissolution rate is about 0.8 g/a with 120 ℃ and pH 8.5; and it can be concluded that there may be a trend for dissolution rate of vitrified HLW that increases with temperatures and acidity. Among the dimension of 1 million years, the maximum dissolution load of HLW vitrified waste is 80% with 120 ℃ and pH 8.5. When considering that the disposal temperature at 60 ℃ and the range of ground water pH is 6—10, the most conservative estimated dissolution load of vitrified HLW is less than 50% over the dimension of 1 million years.

Key words: vitrified HLW, deep geological disposal, dissolution mechanism

CLC Number:

X132

Li Honghui, Li Peng, Cui Zengqi, Wan Yaping, Jia Meilan, Liu Jianqin, Zhao Shuaiwei, Mao Liang, Liu Wei. Mechanism analysis and calculation of vitrified HLW dissolution due to ground water erosion in the process of geological disposal[J].RADIATION PROTECTION, 2016, 36(1): 7-13.

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Mechanism analysis and calculation of vitrified HLW dissolution due to ground water erosion in the process of geological disposal

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