Waste treated to impart long storability in ultra-deep underground, method and apparatus for making the same

摘要

A treated waste has been treated so as to prevent diffusion of a substance to be disposed, e.g., radionuclide "I", that tends to occur when the waste is disposed in reducing environment at an ultra-deep underground. The treated waste has a low-resolution compound containing "I", e.g., "AgI", and a high oxygen potential agent having a higher oxygen potential than the compound, e.g., "Fe2O3". Ionization of the substance to be disposed, attributable to reduction of the compound, can be suppressed over a long time.