某地下核设施场址地下水化学特征及其对水循环的指示意义
李杰彪 , 梁修雨 , 周志超 , 赵敬波 , 潘跃龙 , 郭永海
地球科学 ›› 2024, Vol. 49 ›› Issue (03) : 965 -977.
某地下核设施场址地下水化学特征及其对水循环的指示意义
Hydrochemical Characteristics and Its Significance to Groundwater Flow System at an Underground Nuclear Facility Site
,
在核设施场址筛选和长期性能安全评价中, 地下水化学特征是最重要的因素之一. 本文采用数理统计、离子比例法、同位素分析法以及水文地球化学模拟等方法, 对沿海某核设施场址水化学特征及主要控制因素、地下水补给来源与年龄等进行了分析, 并构建了该场址地下水循环演化模式. 研究表明: 场址地下水中TDS较低, pH值多呈弱酸性; 地下水化学类型主要为HCO3-Na·Ca型和HCO3-Ca·Na型; 水化学组分主要受硅酸盐岩风化作用的控制; 地下水主径流路径上以钠长石、钙长石的风化溶解为主; 地下水来源于当地大气降水入渗补给, 硐室深度范围内地下水14C表观年龄为2.08~3.60 ka. 该场址地下水化学特征及水循环交替条件对于保障该核设施的安全性是有利的.
水化学 / 离子来源 / 水文地球化学模拟 / 同位素 / 核设施场址 / 地下水
hydrochemistry / ion source / hydrogeochemical modelling / isotope / nuclear facility site / groundwater
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国防科工局核设施退役及放射性废物治理项目([2019]1496)
深圳市自然科学基金项目(JCYJ20190809142203633)
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