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首页> 外文会议>International Conference on Polymers in Aggressive and Corrosive Environments >ENCAPSULATION OF RADIOACTIVE WASTES IN POLYMERIC MATERIALS
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ENCAPSULATION OF RADIOACTIVE WASTES IN POLYMERIC MATERIALS

机译：在聚合物材料中封装放射性废物

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The use of polymeric materials for the encapsulation of radioactive wastes is not an area extensively researched or utilised in the UK. However, under certain circumstances and for a few specific wastestreams, they potentially offer advantages over other materials but with this come specific issues which Nirex have started to investigate. The use of polymers for the encapsulation and disposal of radioactive wastes exposes them to a unique and challenging environment. This in turn raises a number of areas that need to be investigated to demonstrate that the behaviour of polymer encapsulants is both understood and has no significant detrimental effect on waste management. Amongst the key issues are: 1. engineering of the properties of polymeric materials to provide the desired characteristics; 2. understanding the stability of polymers over an extended timescale under the chemical conditions and radiation fields expected during the storage and disposal of the wastes; 3. prediction of the degradation products of polymers under the relevant conditions and timescales, noting that degradation processes may be slow; 4. understanding the chemistry of potential degradation products, including aqueous species, non-aqueous species and gases; 5. developing suitable means of assessing the impact of degradation products on the overall performance of waste management systems. Initial simple treatments have adopted a conservative but unrealistic approach to the consideration of processes such as degradation. However, this can give rise to unsatisfactory outcomes and can be seen as indicating an incomplete understanding of the behaviour of the materials. Consequently, continuing research is directed towards developing a more realistic treatment of the potential effects of the use of polymer encapsulants, based on improving understanding. This paper presents further details of the issues that arise from the use of polymers and summarises current research.
机译：用于封装放射性废物的聚合物材料不是在英国广泛研究或使用的区域。然而，在某些情况下和一些特定的Wasteasts的情况下，他们可能提供优于其他材料的优势，但是这种情况来到了德克斯已经开始调查的具体问题。用于封装和处置放射性废物的聚合物的使用使其暴露于独特而挑战性的环境。这反过来提高了许多需要研究的区域，以证明聚合物密封剂的行为都被理解，对废物管理没有显着不利影响。在关键问题中是：1。聚合物材料的工程提供所需特性; 2.了解在储存和处理废物期间预期的化学条件和辐射领域的延长时间尺度聚合物的稳定性; 3.在相关条件和时间尺度下预测聚合物的降解产物，注意到降解过程可能很慢; 4.了解潜在的降解产物的化学，包括水性水性，非水物质和气体; 5.制定合适的方法来评估降解产品对废物管理系统的整体性能的影响。最初的简单治疗采用了保守而不切实际的方法，以审议降级等进程。然而，这可能会产生不令人满意的结果，并且可以看出，表明对材料行为的不完全理解。因此，持续研究旨在基于提高理解，旨在开发更现实的治疗聚合物密封剂的潜在效果。本文介绍了使用聚合物的出现问题的进一步细节，并总结了当前研究。

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