摘要
我国首个高水平放射性废物地质处置地下实验室已经开工建设。结合工程研发过程,借助现场试验等手段,建立我国高放废物处置库多重屏障系统模型是地下实验室研究的重要任务之一。开展核心处置单元温度场演化过程模拟分析是验证和优化多重屏障系统设计方案的重要手段。结合瑞典和日本的研究经验,根据我国地下实验室场址岩体的导热性能和赋存条件,开展了核心处置单元温度场数值模拟研究,获得温度场演化规律。研究表明:(1)北山地下实验室场址花岗岩具有良好的导热性和赋存条件,可有效包容和传导高放废物产生的热量,是良好的天然屏障;(2)根据温度场演化模拟结果,可通过缩小处置坑间距,优化处置库单元的设计参数。研究成果为我国处置库概念设计提供参考依据。
The first underground research laboratory for the geological disposal of high-level radioactive waste in China has entered the construction stage.Based on the engineering and research process,one of the important purposes is to establish a multi-barrier system model of China’s repository for high-level radioactive waste with means of field tests.Carrying out the simulation analysis of the temperature field evolution process for the disposal unit is an important way to verify and optimize the design scheme of the multi-barrier system.Based on the research experience of Sweden and Japan,and combined with the thermal conductivity and occurrence conditions of the rock mass of the underground laboratory site in China,a numerical simulation study of the temperature field of the disposal unit is carried out.The evolution law of the temperature field is obtained in this paper,and the analysis results show that:(1)The granite at the Beishan underground laboratory site is a good natural barriers.It has good thermal conductivity and occurrence condition,which can effectively contain and conduct heat generated by high-level radioactive waste;(2)According to the simulation results of temperature field evolution,the design parameters of the disposal unit can be optimized by reducing the spacing between disposal pits.The research provides a reference for the conceptual design of China’s repository..
作者
郑益武
张海洋
张奇
刘健
赵星光
Zheng Yiwu;Zhang Haiyang;Zhang Qi;Liu Jian;Zhao Xingguang(Beijing Research Institute of Uranium Geology,Beijing 100029,P.R.China;CAEA Innovation Center on Geological Disposal of High-level Radioactive Waste,Beijing 100029,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2022年第S02期1049-1055,1062,共8页
Chinese Journal of Underground Space and Engineering
基金
核设施退役治理专项资助科研项目(科工二司〔2020〕194号)
国家自然科学基金(11972149)
关键词
高放废物地质处置
处置单元
围岩热参数
温度场演化
high-level radioactive waste geological disposal
disposal unit
thermal parameters of the surrounding rocks
temperature field evolution
