The Effect of Composition on Short- and Long-term Durability of UK HLW Glass
The Effect of Composition on Short- and Long-term Durability of UK HLW Glass
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成分对英国 HLW 玻璃短期和长期耐久性的影响
DOI：
10.1016/j.mspro.2014.10.025
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Harrison
中科院分区：
文献类型：
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作者：
M. Harrison
了解玻璃的水耐久性对于确定地质处置设施中玻璃化核废料在短期和长期内的溶解和释放至关重要。决定玻璃在水溶液中溶解速率的因素有很多，其中温度和pH等环境因素会很重要。然而，就玻璃性能而言，其成分对水耐久性影响最大。世界范围内大多数高放废物（HLW）均使用硼硅酸盐玻璃进行固定，尽管在该系列中，不同国家之间存在显着的成分差异，具体取决于玻璃化废物的成分。例如，法国 R7T7 HLW 玻璃含有钙，而英国生产的 Magnox 废玻璃含有大量镁，从而导致不同的溶解行为。本文总结了英国玻璃化 HLW 的主要成分变化，并确定了影响玻璃在水溶液中短期和长期耐久性的成分的关键异同。讨论了许多关键元素的影响以及对它们如何影响玻璃溶解机制的当前最新技术的理解。
An understanding of the aqueous durability of glass is essential for determining the dissolution and release of radionuclides from vitrified nuclear waste in a geological disposal facility over short and long timescales. There are many factors that determine the rate of glass dissolution in aqueous solution, and environmental factors such as temperature and pH will be significant. However, in terms of glass properties, the composition has the biggest influence on aqueous durability.The majority of High Level Waste (HLW) worldwide has been immobilised using borosilicate glass, although within this family there are significant compositional variations between different countries depending on the composition of the waste being vitrified. For example, the French R7T7 HLW glass contains calcium, while the Magnox waste glass produced in the UK contains significant quantities of magnesium, which results in different dissolution behavior.This paper summarizes the main compositional variations in UK vitrified HLW and identifies the key similarities and differences in composition that affect short- and long-term glass durability in aqueous solution. The effect of a number of key elements is discussed along with the current state of the art understanding of how they impact on the glass dissolution mechanisms.