Application of Recycled Concrete Material for the Immobilization of Radioactive Waste

再生混凝土材料在放射性废物固定化中的应用

• 批准号: 2740408
• 金额: --
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2740408
• 关键词: Application; Recycled; Concrete; Material; Immobilization

Decommissioning activities of nuclear facilities usually result in a large quantity of Recycled Concrete Material (RCM). To date, 30 Magnox reactors on 11 sites have been closed down in the UK, 8 AGR on 4 sites are due to be closed down within 5 years, and remaining 6 AGR on 3 sites by 2030. If RCM could be repurposed rather than disposed as radioactive waste, for example for cementation of ILW and/or LLW, it would allow for offsetting some of the virgin cement consumption and the associated carbon footprint, as well as contributing to the reduction the RCM stockpiles to manage at SLCs. This project investigates the feasibility of using Recycled Concrete Material (RCM) generated in the decommissioning activities for nuclear waste encapsulation in order to minimise the use of Blast Furnace Slag (BFS) and Pulverised Fuel Ash (PFA) in cementation. The utilisation of RCM is meaningful particularly under the constraints on current and future supply of the supplemental cementitious materials such as BFS and PFA, due to their reducing availability in the future. Once established, RCM could offer an alternative and secure source of materials for the future management (cementation) of radioactive waste with minimal constraints on the supply of raw materials caused by the external industrial situation.

核设施退役过程中会产生大量的混凝土材料。到目前为止，英国已经关闭了11个地点的30个Magnox反应堆，4个地点的8个AGR将在5年内关闭，到2030年将关闭3个地点的6个AGR。如果RCM可以重新利用，而不是作为放射性废物处置，例如用于ILW和/或LLW的水泥化，则可以抵消一些原始水泥消耗和相关的碳足迹，并有助于减少SLC管理的RCM库存。本项目研究了使用退役活动中产生的混凝土材料（RCM）进行核废料封装的可行性，以尽量减少在胶结过程中使用高炉矿渣（BFS）和粉煤灰（PFA）。RCM的使用是有意义的，特别是在目前和未来的补充胶凝材料，如BFS和PFA的供应限制，由于他们在未来的可用性减少。一旦建立，区域协调机制可为放射性废物的未来管理（水泥化）提供一种替代和安全的材料来源，同时将外部工业形势对原材料供应的限制降到最低。