Gel comprising colloidal solution, useful for radioactive decontamination of a surface, particularly of a nuclear installation, comprises inorganic vicosifying agent, surfactant, inorganic acid/base, oxidizing agent and water

摘要

Gel comprising colloidal solution, comprises an inorganic vicosifying agent (5-25 wt.%), surfactant (0.01-7 wt.%), inorganic acid/base (0.5-7 mol/l), optionally an oxidizing agent (0.05-1 mol/l) having a normal redox potential higher than 1.4V in strong acid medium, or the reduced form of the oxidizing agent and water. INDEPENDENT CLAIM are included for: (1) decontamination of a surface comprising a cycle i.e. application of the gel on the surface to be decontaminated, maintenance of the gel on the surface at 20-30[deg]C and a relative humidity of 20-70% for 2-72 hours, to form dry and solid residues on the surface and elimination of the dry and solid residues to make the surface being decontaminated; and (2) the decontamination of a surface of an installation, comprising de-dusting of the surface followed by decontamination of the vacuum-cleaned installation.