| 添加剂对放射性废物处置场中U及~(90)Sr的分配系数研究 |
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| 引用本文： | 于静,吴勇,孙晋玉.添加剂对放射性废物处置场中U及~(90)Sr的分配系数研究[J].矿物岩石,2009,29(2). |
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| 作者姓名： | 于静 吴勇 孙晋玉 |
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| 作者单位： | 成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川,成都,610059 |
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| 摘 要： | 通过滞留实验评价放射性废物处置场盖层不同基础物料与添加剂对放射性U与^90Sr的屏障效果，以确定不同基础物料及添加荆配合条件下U与^90Sr的分配系数Ka。滞留实验成果表明天然深褐色含腐殖质含角砾砂质亚粘土对U与^90Sr的Kd分别为1838．13和36．16，为良好的基础物料，添加Na2S和Na2CO3后可增大对^90Sr的滞留，添加碳质砂岩粉可增加对U的滞留。在还原条件下，洪积物及泥石流堆积物以及残积成因含角砾粉砂土基础物料在添加Na2S后，^90Sr的Kd为3069．30～3494．28；添加Na2CO3后，^90Sr的Kd为81．22～22203．6。洪积物及泥石流堆积物的泥、砂和砾石混合物、变质碳质粉砂岩风化物、残积成因砂质亚粘土和坡积物砂质亚粘土等4类基础物料添加FeS2、腐殖土后对U和^90Sr的滞留效果总体较差；净水剂、磷灰岩和粉煤灰3类添加剂对U和Sr的屏障效果以负面影响为主，不宜用作屏障添加剂。实验结果表明U与Sr的迁移-固定性能相反，在放射性元素迁移途径上宜分别建造U，Sr屏障，且优先处置U放射性元素。
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| 关 键 词： | 地球化学屏障 添加剂 U和^90Sr 滞留实验 分配系数 |
A ROLE OF GEOCHEMICAL BARRIER OF ADDITIVE MATERIELS FOR U AND ~(90)SR IN A RADIOACTIVITY WASTES DISPOSAL SITE |
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| YU Jing,WU Yong,SUN Jin-yu.A ROLE OF GEOCHEMICAL BARRIER OF ADDITIVE MATERIELS FOR U AND ~(90)SR IN A RADIOACTIVITY WASTES DISPOSAL SITE[J].Journal of Mineralogy and Petrology,2009,29(2). |
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| Authors: | YU Jing WU Yong SUN Jin-yu |
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| Institution: | YU Jing,WU Yong,SUN Jin-yu State Key Laboratory of Geological Hazard Prevention , Geological Environment Protection,Chengdu University of Technology,Chengdu 610059,China |
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| Abstract: | Effects of basic and additive materials on selection of radioactivity wastes disposal cover in site on retardation of U and 90Sr are evaluated.The distribution coefficients(Kd)of U and 90Sr are made under different conditions.Kd of U and 90Sr for brown arenaceous clay with humus is 1 838.13 and 36.16,respectively.Kd of 90Sr increases and Kd of U decreases when Na2S or Na2CO3 is added into the clay.Kd of U increases when carbonaceous sandstone powder is added into the clay.Kd of 90Sr varies from 3 069.30 to ... |
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| Keywords: | geochemical barrier additive U & 90Sr retardation experiment distribution coefficient |
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