高放废物处置库新疆雅满苏和天湖预选地段地下水同位素特征及其指示意义

发布时间：2018-01-28 17:34

  本文关键词： 高放废物处置库 水文地质 同位素 地下水 雅满苏和天湖地段　出处：《地质学报》2016年02期 　论文类型：期刊论文

【摘要】：高放废物地质处置是将高放废物与人类环境安全隔离的有效途径。高放废物处置库的围岩通常为低渗透的岩体,其安全性在很大程度上取决于围岩对核废物的屏障功能和作为核素迁移载体的裂隙水运动特征。因此,开展处置库场址水文地质评价工作尤为重要。新疆雅满苏和天湖预选地段是我国高放废物处置库预选地段之一。花岗岩是选定的围岩。在过去的3年里,为了认识该地段地下水的形成机制和更新能力,提供该区处置库场址筛选和评价的依据,在该区开展了区域水文地质调查和地下水样品采集。根据调查结果和样品测试数据,本文主要讨论了该地段地下水同位素特征及其水文地质意义,结果表明,地下水δ~2H值主要分布在10.6‰至-82.5‰之间,平均值-46.1‰;δ~(18)O值主要分布在10.2‰至-9.8‰‰之间,平均值-2.06‰;地下水氚含量在1TU~46.1TU之间。地下水δ~2H和δ~(18)O散点图显示,二者主要落在大气降水线的附近和下方,表明区内地下水主要源自当地现代降水的补给,并经受了强烈的蒸发作用,且深部地下水交替能力明显弱于浅部地下水。这一认识为该区处置库选址和场址评价提供了重要水文地质依据。
[Abstract]:Geological disposal of high-level radioactive waste is an effective way to isolate high-level radioactive waste from human environment safely. The surrounding rock mass of high-level radioactive waste repository is usually low permeability rock mass. Its safety depends to a great extent on the barrier function of surrounding rock to nuclear waste and the characteristics of fissured water movement as a carrier of nuclide migration. It is very important to carry out the hydrogeological evaluation of the disposal depot site. The Tianhu pre-selected area of Yamen Su He in Xinjiang is one of the pre-selected sites in China's high-level radioactive waste disposal depot. Granite is the selected surrounding rock. In the past three years. In order to understand the formation mechanism and renewal ability of groundwater in this area, it provides the basis for site selection and evaluation of the disposal bank in this area. Regional hydrogeological survey and groundwater sample collection have been carried out in this area. Based on the investigation results and sample test data, this paper mainly discusses the isotopic characteristics of groundwater and its hydrogeological significance in this area, the results show that. The 未 ~ (2) H values of groundwater are mainly between 10.6 鈥，

本文编号：1471122