Diffusion of uranium in compacted bentonites in the reducing condition with corrosion products of iron

摘要: In the vicinity of a high-level waste repository, corrosion carbon steel overpacks will create reducing environment. Reducing conditions are expected to retard migration redox-sensitive radionuclides such as technetium. The apparent diffusion coefficients technetium were measured in compacted bentonites (Kunigel VI® and Kunipia F®, JAPAN) contact with its products under or without oxidizing for comparison. 10-12 10-13 m2/s conditions. There significant effects redox condition, dry density (0.2 2.3 g / cm3) montmorillonite content (50% Kunigel VI 100% F) on coefficients. Montmorillonite could be good index explain dependence both