世界核地质科学2025，Vol.42Issue(3)：471-484,14.DOI:10.3969/j.issn.1672-0636.2025.03.001
高放废物处置库新场预选地段及南部下游地区地下水循环特征研究
Groundwater circulation characteristics of Xinchang preselected site and the southern periphery in Beishan area for high-level radioactive waste disposal repository
摘要
Abstract
Hydrogeological conditions are crucial for the site selection and long-term safety assessment of high-level radioactive waste(HLW)disposal repositories.This study focuses on the groundwater circulation characteristics of Xinchang preselected site and its southern periphery of the Beishan area for HLW disposal.A comprehensive approach employing multiple environmental isotopes,hydrodynamics,and numerical modelling was used to investigate groundwater circulation within the study area.Results indicated that groundwater in shallow loose sediments exhibited relatively rapid renewal rates,with an average age generally less than 30 years.The apparent 14C age of deep bedrock groundwater generally exceeding 10 ka within the underground research laboratory(URL)site.There was no evidence of contributions from deep crustal or mantle sources to groundwater within the region.Within the Xinchang site,the groundwater head shows pronounced vertical stratification,with a higher hydraulic head in shallow zones than in deeper ones.Groundwater in boreholes distant from the gully shows weak hydraulic connectivity with precipitation,and the groundwater level often exhibits periodic fluctuations.The groundwater flow systems can be categorized into three types:regional,intermediate,and local.The local flow system was the most active,accounting for over 80%of the total flux.These characteristics showed that the hydrogeological conditions in the study area were favorable for the geological disposal of HLW.关键词
地下水循环/环境同位素/地下水动态/数值模拟/高放废物处置Key words
groundwater circulation/environmental isotope/groundwater dynamics/numerical simulation/high level radioactive waste disposal分类
地质学引用本文复制引用
李杰彪,周志超,赵敬波,张明,季瑞利,吉子健,直越昊,田震..高放废物处置库新场预选地段及南部下游地区地下水循环特征研究[J].世界核地质科学,2025,42(3):471-484,14.基金项目
中核集团研发平台稳定支持科研项目(编号:中核科发[2024]468号)资助 Supported by Stable Support Program for Scientific Research Projects of the China National Nuclear Corporation R&D Platform(No.CNNC-STD[2024]468) （编号:中核科发[2024]468号）
