Method of sealing refractory vessel containing radioactive wastes

Claim 1

A METHOD FOR SEALING A REFRACTORY VESSEL CONTAINING A SOLID FIXATION MIXTURE OF A RADIOACTIVE COMPONENT AND NON-RADIOACTIVE FIXATION COMPONENTS WHICH MIXTURE HAS BEEN FED THROUGH AN ENTRANCE PORT OF THE VESSEL WHICH COMPRISES: SEALING THE ENTRANCE PORT OF THE VESSEL, SUBMERGING THE SEALED VESSEL IN A SEALANT MIXTURE CONTAINED IN A SECOND LARGER CONTAINER, SAID SEALANT MIXTURE CONTAINING A METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF OXIDES OF CHROMIUM, COBALT AND IRON AND AN ELEMENTAL METAL SELECTED FROM THE GROUP CONSISTING OF OF ALUMINUM, BORON, ZIRCONIUM, AND SILICON, APPLYING HEAT TO THE OUTER SURFACE OR THE SECOND CONTAINER TO RAISE THE SEALANT MIXTURE TO ITS IGNITION TEMPERATURE AND ALLOWING THE HEAT GENERATED BY THE SEALANT MIXTURE TO CHEMICALLY REACT SAID SOLID FIXATION MIXTURE, TO CHEMICALLY REACT THE SEALANT MIXTURE AND TO PROVIDE A PROTECTIVE BARRIER AROUND SAID VESSEL WHICH IS RESISTANT TO CORROSION, EROSION AND DEGRADATION.

Claim 2

A METHOD FOR SEALING A REFRACTORY VESSEL CONTAINING A SOLID FIXATION MIXTURE OF A RADIOACTIVE COMPONENT AND NON-RADIOACTIVE FIXATION COMPONENTS WHICH MIXTURE HAS BEEN FED THROUGH AN ENTRANCE PORT OF THE VESSEL WHICH COMPRISES: SEALING THE ENTRANCE PORT OF THE VESSEL, SUBMERGING THE SEALED VESSEL IN A SEALANT MIXTURE CONTAINED IN A SECOND LARGER CONTAINER, SAID SEALANT MIXTURE CONTAINING A METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF OXIDES OF CHROMIUM, COBALT AND IRON AND AN ELEMENTAL METAL SELECTED FROM THE GROUP CONSISTING OF OF ALUMINUM, BORON, ZIRCONIUM, AND SILICON, APPLYING HEAT TO THE OUTER SURFACE OR THE SECOND CONTAINER TO RAISE THE SEALANT MIXTURE TO ITS IGNITION TEMPERATURE AND ALLOWING THE HEAT GENERATED BY THE SEALANT MIXTURE TO CHEMICALLY REACT SAID SOLID FIXATION MIXTURE, TO CHEMICALLY REACT THE SEALANT MIXTURE AND TO PROVIDE A PROTECTIVE BARRIER AROUND SAID VESSEL WHICH IS RESISTANT TO CORROSION, EROSION AND DEGRADATION.