Formation factor measurements in granite in the laboratory - Comparison of through diffusion and electromigration techniques

机译：实验室中花岗岩的形成因子测量-通过扩散和电迁移技术的比较

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Traditionally the effective diffusivity in and the formation factor of intrusive igneous rock have been measured in the laboratory by through diffusion (TD) experiments, which are very time consuming in larger samples with low porosity. In previous work alternating current (AC) has been used to measure the formation factor directly in large samples. In this paper direct current is used to actually transport the tracers through the rock sample in so called through electromigration (TEM) experiments. In these experiments electoosmosis has to be corrected for. The experimental time is reduced substantially when adding an electromigratory flux to the diffusive flux. TD, TEM and AC experiments were performed on a 15 mm thick unweathered granite sample from Laxemar, Sweden. The tracers uranin and iodide were used. The formation factor measured with the three methods varied between 1.2·10~(-4) - 2.87·10~(-4).

机译：传统上，侵入式火成岩的有效扩散率和形成因子是在实验室中通过扩散（TD）实验来测量的，在低孔隙度较大的样品中这非常耗时。在以前的工作中，交流电（AC）已用于直接测量大型样品中的形成因子。在本文中，通过电迁移（TEM）实验，使用直流电将示踪剂实际传输通过岩石样品。在这些实验中，电渗必须进行校正。当将电迁移通量添加到扩散通量中时，实验时间大大减少。 TD，TEM和AC实验是在瑞典Laxemar的15毫米厚未风化花岗岩样品上进行的。使用了示踪剂尿素和碘化物。三种方法测得的形成因子在1.2·10〜（-4）-2.87·10〜（-4）之间变化。

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《The 26th Symposium on Scientific Basis for Nuclear Waste Management XXVI Dec 2-5, 2002 Boston, Massachusetts, U.S.A.》|2002年|p.529-534|共6页
会议地点 Boston MA(US);Boston MA(US)
作者
Martin Loefgren; Ivars Neretnieks;
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Chemical Engineering and Technology, Royal Institute of Technology, Teknikringen 26, 100 44 Stockholm, Sweden;

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原文格式 PDF
正文语种 eng
中图分类原子能技术;
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Formation factor measurements in granite in the laboratory - Comparison of through diffusion and electromigration techniques

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