초록 ▼

Method and apparatus for conditioning weakly to medium-active wastes through fused vitrification by means of electric electrodes for generating the melting heat. The wastes optionally with additive materials are filled into a cup-shaped melting crucible which contains at least two electrodes. The me

Method and apparatus for conditioning weakly to medium-active wastes through fused vitrification by means of electric electrodes for generating the melting heat. The wastes optionally with additive materials are filled into a cup-shaped melting crucible which contains at least two electrodes. The melting crucible is closed off at the top by a furnace hood which has current leads. Voltage is applied to the electrodes via the current leads until the melting crucible containing material to be melted has melted. The current leads are separated from the electrodes. The furnace hood is removed, and after the cooling down, the melting crucible is filled with inactive cement paste to produce a cover layer.

대표청구항 ▼

Method for conditioning radioactive wastes in a crucible for melting the radioactive wastes and which crucible also serves as the final storage container for the wastes vitrified therein, which comprises disposing at least two spaced electrodes to project into the radioactive wastes introduced as fe

Method for conditioning radioactive wastes in a crucible for melting the radioactive wastes and which crucible also serves as the final storage container for the wastes vitrified therein, which comprises disposing at least two spaced electrodes to project into the radioactive wastes introduced as feed into the melting crucible, tightly fitting a furnace-hood over the melting crucible, said hood having current leads through the hood connected to an electric source of power, supplying heat for melting the feed wastes in the melting crucible by resistance heating of the wastes by passing the electric current through the electrodes while maintaining reduced pressure in the interior of the furnace hood, adding additional feed to the melt in the crucible while applying electric current to the eletrodes until the crucible is almost completely filled, removing the furnace-hood together with the current leads from the crucible, retaining the electrodes permanently in the vitrified leach-resistant body of wastes in the crucible, cooling the melting crucible and filling the cooled crucible with an inactive cement paste.