Radiolytic Gas Formation in Aqueous Alkali-Nitrate and Alkali_nitrate-Aluminate Solutions Simulating Liquid Intermediate-Level Wastes

摘要

Radiolytic gas formation was measured in aqueous alkali-nitrate and alkali-nitrate and alkali-nitrate-aluminate solutions simulating liquid intermediate-level wastes. The radiation-chemical yields of the gas mixture and its individual components depending on solution composition and irradiation temperature (up to 60 ℃) were determined. It was noted that oxygen was formed in comparatively high yields (up to ～0.4 and ～0.6 molecule/100 eV in alkali-nitrate-aluminate solutions at 30 and 60 ℃, respectively). This fact was explained by the decomposition of hydrogen peroxide, which is formed as a primary product of water radiolysis and in the combination of O~- radical ions, and by the catalytic effect of aluminate ions.