Patent ID: 8796500

Claim:
A method of disposing of radioactive metal waste using melting decontamination, comprising: 1) sorting radioactive metal waste generated in nuclear fuel processing or production facilities by predetermined sorting criteria and charging the sorted metal waste into a melting furnace so that the metal waste is melted; 2) adding a impurity remover to a melt of the melting furnace and removing generated slag; 3) pouring the melt having no slag into at least one mold thus producing an ingot; 4) subjecting the ingot to gamma spectroscopy using a gamma spectrometer to measure gamma rays of U-235 (185.72 key, 57.2%) among uranium isotopes, performing detector calibration using a certified reference material (CRM) and self-absorption correction depending on a density of a medium using a MCNP (Monte Carlo N-Particle) computer code, and calculating total radioactivity of the ingot from quantified radioactivity and mass of U-235; and 5) determining whether the ingot subjected to radioactivity measurement satisfies a clearance limit.