A simulation of radiolysis of chloride solutions containing ferrous ion

ABSTRACTTo investigate the effect of dissolved species from steels on the radiolysis processes of Cl−, radiolysis simulations of solutions containing both Cl− and Fe2+ were carried out. The results showed that the generation of radiolytic products (H2O2, O2 and H2) increased mainly by the addition of Fe2+, and the concentrations of H2O2 and O2 increased with increasing dose rate. Moreover, radiolysis of Fe2+ solutions also induced noticeable pH drop due to the hydrolysis of Fe3+. This pH drop enhanced the reactivity of Cl− with ∙OH, which induced additional generation of H2O2 and O2. These results show that low concentrations of Cl− (1 × 10−3 mol/dm3 = 35 mg/kg) in the presence of Fe2+ could influence the generation of H2O2 and O2 during water radiolysis. On the other hand, it is considered that these effects of Fe2+ and Cl− on water radiolysis are less important for corrosion of steels due to the low concentrations of H2O2 and O2 generated if the concentrations of these additives and dose rate are suffic...