The influence of metal structures corrosion products of the repository on the sorption behavior of long-lived radionuclides in the environment of the host crystalline rocks should be taken into account during predictive modeling to confirm the safety of deep disposal of radioactive waste (RW). In this work the influence of iron (II/III) on the sorption and spatial distribution of Np, Pu and Am on the minerals of the fractured rock sample of the Yeniseisky site of the Nizhnekansky massif (Krasnoyarsk region) was investigated. Kinetic dependences and quantitative parameters of actinide sorption in the presence of iron in model solutions, including the solution after contact with steel ST3, were obtained. It is shown that the presence of iron in the form of hydroxide increases the sorption/precipitation of actinides, while iron in ionic form practically does not affect the sorption of actinides by rocks. The preferential actinide retention phase, which was formed by iron (III) precipitation on the calcite surface, was determined by digital radiography. It was determined by Raman spectroscopy that this phase corresponds with the iron-bearing mineral lepidocrocite.
A.A. Rodionova (Wed,) studied this question.