Immobilisation Science Laboratory, Department of Materials Science & Engineering, The University of Sheffield, Sheffield, S1 3JD, United Kingdom.
Immobilisation Science Laboratory, Department of Materials Science & Engineering, The University of Sheffield, Sheffield, S1 3JD, United Kingdom.
J Hazard Mater. 2021 Jan 5;401:123764. doi: 10.1016/j.jhazmat.2020.123764. Epub 2020 Aug 28.
Materials from GeoMelt® In-Container Vitrification (ICV)™ of simulant UK nuclear wastes were characterised to understand the partitioning of elements, including inactive surrogates for radionuclide species of interest, within the heterogeneous products. Aqueous durability analysis was performed to assess the potential disposability of the resulting wasteforms. The vitrification trial aimed to immobilise a variety of simulant legacy waste streams representative of decommissioning operations in the UK, including plutonium contaminated material, Magnox sludges and ion-exchange materials, which were vitrified upon the addition of glass forming additives. Two trials with different wastes were characterised, with the resultant vitreous wasteforms comprising olivine and pyroxene crystalline minerals within glassy matrices. Plutonium surrogate elements were immobilised within the glassy fraction rather than partitioning into crystalline phases. All vitrified products exhibited comparable or improved durability to existing UK high level waste vitrified nuclear wasteforms over a 28 day period.
采用 GeoMelt® 容器内玻璃体固化（ICV）技术对模拟英国核废物进行了处理，以了解元素的分配情况，包括感兴趣的放射性核素种类的非活性示踪剂，在非均相产物中的分配情况。进行了水浸耐久性分析，以评估所得废物形式的潜在处置能力。玻璃化试验旨在固定各种模拟的英国退役作业遗留废物流，包括钚污染材料、镁诺克斯污泥和离子交换材料，这些废物在添加玻璃形成添加剂后进行了玻璃化处理。对两种不同废物的试验进行了表征，所得玻璃体废物由橄榄石和辉石晶状矿物组成，位于玻璃基质中。钚示踪元素被固定在玻璃相中，而不是分配到晶相中。所有的玻璃化产品在 28 天的时间内表现出与英国现有高水平废物玻璃化核废物形式相当或更好的耐久性。
