Methodology development for volume reduction and safe storage and disposal of low and intermediate level radioactive wastes

低、中水平放射性废物减容、安全储存和处置的方法开发

• 批准号: 519797-2017
• 负责人: Wren, Jungsook
• 金额: $ 7.53万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=668928
• 关键词: Methodology; development; volume; reduction; safe

Canada relies on nuclear power to provide a significant proportion of its clean, non-carbon-emitting energy, and has an enviable record for safe operation of nuclear power plants and storage of the nuclear waste that they produce. Waste is currently stored at the sites where it is generated, but strategies for its long-term storage or disposal are being developed. For low and intermediate level wastes (L & ILW), which do not include spent nuclear fuel, Ontario Power Generation plans to use a Deep Geologic Repository (DGR) which will safely store the waste deep underground in impermeable rock. Existing L & ILW wastes will be stored in the repository, as well as new wastes generated from continuing power plant operations and decommissioning and refurbishment of reactors.**This project is designed to support the DGR operation by addressing two important aspects: the need to reduce the volumes of waste stored in the DGR, and the need to package the waste so that it can be safely and efficiently transported, and safely held in the DGR in the 60-100 years that it will operate before it is permanently sealed. The first part of the project will explore methods for decontaminating the surfaces of metallic wastes, so that the radioactive surface contaminants can be separated from the bulk metal. The second part of the project will investigate the use of geopolymers for the containment of certain types of wastes. Geopolymers are mechanically tough composites that can be produced from existing industrial waste materials, and are expected to contain the radioactive waste in a way that minimizes the leaching out of radioactive components, and the generation of gases that can cause the materials to swell or fracture. **This project will produce new scientific knowledge that will allow the volumes of wastes stored in the DGR to be reduced, and ensure certain types of waste are more safely contained. This research will therefore allow the costs of the DGR project to be minimized, and the short, medium, and long-term safety of the project to be augmented.******************

加拿大依靠核能提供其清洁、无碳排放能源的很大一部分，并在核电厂安全运行和储存其产生的核废料方面有着令人羡慕的记录。 目前，废物储存在产生废物的地点，但正在制定长期储存或处置废物的战略。对于不包括乏核燃料的低和中水平废物（L & ILW），安大略发电公司计划使用一个深层地质储存库（DGR），将废物安全地储存在地下深处的不透水岩石中。 现有的L & ILW废物将储存在处置库中，以及发电厂持续运行和反应堆退役和翻新产生的新废物。该项目旨在通过解决两个重要方面来支持DGR的运行：需要减少DGR中存储的废物量，以及需要包装废物，以便在永久密封之前，在DGR将运行的60-100年内安全地运输和保存。该项目的第一部分将探索金属废物表面去污的方法，以便将放射性表面污染物与散装金属分离。该项目的第二部分将调查使用地质聚合物来控制某些类型的废物。地质聚合物是机械上坚韧的复合材料，可以从现有的工业废料中生产，并有望以最大限度地减少放射性成分浸出的方式包含放射性废物，以及可能导致材料膨胀或破裂的气体的产生。** 该项目将产生新的科学知识，使DGR中储存的废物量减少，并确保某些类型的废物得到更安全的控制。因此，这项研究将使DGR项目的成本最小化，并增加项目的短期，中期和长期安全性。