Migration behavior of materials in clay buffer materials in geological disposal of high-level radioactive waste and migration-controlled corrosion of iron

为了对地质处置进行安全评价，有必要了解铁在膨润土缓冲材料中的腐蚀行为，找出影响腐蚀的重要参数。本文研究了电场梯度作用下压实膨润土中铁的腐蚀和离子的迁移。此外，通过对沉积岩样进行渗透系数测量和X-射线显微CT观察，研究了沉积岩样的水力特性。此外，还对Fe(II)-蒙脱石的渗透系数进行了测量，以了解膨润土的改性对其作为缓冲材料的性能的影响。

For the safety assessment of the geological disposal, it is necessary to understand the corrosion behavior of iron in bentonite buffer material and identify important parameters to affect the corrosion. In this study, corrosion of iron and migration of ions in compacted bentonite under electrical gradient were studied. In addition, hydraulic property of sedimentary rock sample was studied by conducting hydraulic conductivity measurement and X-ray micro CT observation of the rock sample. Hydraulic conductivity measurements were also made for Fe(II)-montmorillonite to understand the effect of the alteration of bentonite on the performance as the buffer material.