Wet Oxidation Process for High Dose Resin

Wet Oxidation Process

The wet oxidation process is used to mineralize and reduce the volume of high-dose ion exchange resins (high-dose resins) containing radioactive materials by decomposing organic materials into water and carbon dioxide gas in an aqueous solution. Hydrogen peroxide is supplied in the presence of a catalyst (Fe, Cu, etc.) to decompose high-dose resins at 100°C under normal pressure.

Pilot Test Facility
Pilot test facility


  • High-dose resins can be reduced in volume and mineralized
  • Mild operating conditions (Normal pressure, 100℃)
  • Simple equipment configuration and easy maintenance
  • Compact exhaust gas facility compared to high-temperature treatment systems
  • Almost no transfer of radioactive materials into the gaseous phase
  • After treatment, the decomposed liquid can be transferred through piping.


The wet oxidation process is suitable for the decomposition of the following organic materials generated at nuclear facilities

  • High-dose resins (Granular resins, Powdered resins)
  • Filter sludge
  • Chelating agents


  • Demonstration tests of actual waste decomposition at domestic nuclear power plants
  • Chelating agent-containing wastewater treatment facilities for U.S. electric power facilities