我国岩洞型低中放废物处置核素迁移计算库室模型研究

RESEARCH ON NUCLIDE TRANSPORT COMPARTMENT MODEL FOR LOW AND INTERMEDIATE LEVEL WASTE DISPOSAL IN ROCK CAVERN TYPE

关闭后核素经由处置设施释出并在环境中的迁移计算是放射性废物处置安全评价的核心内容,目前国际常用的评价方法为库室模型方法。我国低中放废物岩洞型处置尚处于选址与初步可行性研究的初期阶段,在此背景下,结合已有的岩洞型处置初步概念设计、工程屏障材料性能与预选场址地下水流动特性,开展核素迁移计算库室模型研究十分必要,研究成果弥补了我国岩洞型处置核素迁移评价的空白,为后续安全评价与工程设计迭代优化的开展奠定了良好基础。

Transport calculation of nuclides from disposal facilities into surrounding environment after closure is the core part of disposal safety assessment,and the compartment model is a widely accepted method to deal with this requirement nowadays. In China,the Low and Intermediate Level Waste（LILW） rock cavern disposal is still in the early stage of sitting and preliminary feasibility study,which can provide conditions for research on nuclide transport compartment model. An assessment model was set up based on preliminary conceptual design,engineering barrier materials and groundwater conditions in pre-selected site. The established model made up the gap in this area in China and also laid a stable foundation for iteration between safety assessment and engineering design.