高放玻璃固化体化学耐久性评估方法研究进展

Research Progress on Evaluation Method of Chemical Durability of HLW Glass

高放玻璃固化体在地质处置过程中,地下水对玻璃体的侵蚀是放射性核素进入生态圈的主要方式。化学耐久性用于评价玻璃固化体的抗侵蚀性能。由于侵蚀机理复杂,在长期的研究过程中,使用了大量的化学耐久性评价方法。MCC、PCT等标准方法用于区分玻璃固化体的抗浸出性能。为深入研究侵蚀反应机理,SPFT(单通道流通法)、MCFT(微通道流通法)等方法被设计出来。29Si及D等同位素的使用,为研究玻璃化学耐久性提供了新的方法。我国需要加快在玻璃化学耐久性评价方法的研究。

In the process of geological disposal,the HLW glass corrosion by groundwater is the main way of radionuclides entering the ecology circle. Chemical durability is used to evaluate the corrosion resistance of glass. Due to complex corrosion mechanism,a large number of chemical durability evaluation methods have been used in the research. MCC,PCT methods and other standard methods used to distinguish differences in the leaching behavior of candidate glasses. In order to study the mechanism of corrosion behavior,SPFT（ single pass flow through method）,MCFT（ micro channel flow through method） are designed. The use of 29 Si and D isotopes provides a new approach to the study of glass chemical durability. China needs to accelerate the study of glass chemical durability evaluation methods.