Development of stress analysis software to guide waste package design for use in Deep Borehole Disposal of high-level nuclear waste.

开发应力分析软件，指导用于高放核废料深钻孔处置的废物包装设计。

• 批准号: 2598011
• 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: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2598011
• 关键词: Development; stress; analysis; software; guide

Deep Borehole Disposal (DBD), a potentially transformative disposal concept largely pioneered at the University of Sheffield, has gained global attention as a potentially safer, more secure and cost-effective solution to the disposal of HLW and spent fuel. In DBD, the waste containers are stacked vertically within the waste deployment zone of the borehole (lowest 1-2 km). It is important when considering the post-operational safety case to ensure that the containers (and any overpacks) are able to withstand both the vertical load stresses and a large hydrostatic pressure without compromising the mechanical integrity of the packages.The PhD student would focus on the stress analysis for the canister design where the aim is to guide the thickness of the canisters or overpack walls such that they withstand the downhole pressure and the load of containers in a vertical columned stack. The finite element method (FEM) will primarily be used. Detailed nonlinear models will be developed to achieve an eventual series of nuclear waste filled canisters while at the same time considering the interaction of the surrounding environment (e.g. soil/rocks). This approach would then be implemented into a tailored software package for this application that would allow engineers to quickly and easily find the minimum thickness and number of canisters for a given disposal scenario (waste type, hole diameter, etc).

深钻孔处置（DBD）是一种潜在的变革性处置概念，主要由谢菲尔德大学首创，作为处置高放废物和乏燃料的一种潜在的更安全、更可靠和更具成本效益的解决方案，已获得全球关注。在DBD中，废物容器垂直堆放在钻孔的废物部署区内（最低1-2 km）。在考虑操作后安全情况时，重要的是确保容器（和任何外包装）能够承受垂直载荷应力和大的静水压力，而不会影响包装的机械完整性。博士生将专注于罐设计的应力分析，其目的是指导罐或外包装壁的厚度，使其能够承受井下压力。压力和负载的容器在一个垂直的柱状堆栈。将主要使用有限元法（FEM）。将开发详细的非线性模型，以实现最终的一系列核废料填充罐，同时考虑周围环境（如土壤/岩石）的相互作用。这种方法将被实施到一个专门针对这一应用的软件包中，使工程师能够快速、轻松地找到给定处置方案（废物类型、孔径等）的最小厚度和罐的数量。