华南某预选低-中放射性废物处置场地下水流模拟

Modelling of the Regional Groundwater Flow of in a Potential Disposal Site of Low and Intermediate Level Radioactive Waste in South China

放射性废物的处置已成为制约核能可持续发展的关键因素。地下水流场的研究对低、中放射性废物处置场的场址选择、环境影响评价、工艺方案、工程建设和运营维护等都有很强的指导意义。采用数值方法,建立低、中放射性废物处置场地下水数值模型,利用地下水长期观测资料对模型进行识别、校正,并利用校正后的模型分析处置场场平后的地下水流场。计算结果表明,场平单元覆盖后,沟谷被填埋,地下水流主方向逐渐以由东向西为主,同时水力坡度发生较大变化,场平单元覆盖后的流场总体水力坡度变缓。

The disposal of the radioactive wastes are the key factor for sustainable development of nuclear energy. The research of groundwater flow field in the has an immediate guidance in the selection of Low and Intermediate Level Radio Active Waste （LILW） disposal site, environmental impact assessment, site arrangement, engineering construction cost and schedule, opera- tion as well as maintenance, etc.. The numerical model was established to simulate the groundwater flow in the potential LILW disposal site. The model verification and calibration were achieved by the analysis of the long term groundwater observation da- ta at the site. The calibrated model was used to groundwater flow field of the site after the filling operation. The results indi- cate that, after the site earthwork, the low valley areas were filled. The prevailing groundwater flow direction gradually turns from the east to the west with time. The groundwater gradient generally decreases after the earthwork.