Consumable anode, electrodissolution process applied to the decontamination of slightly radioactive liquid effluents and apparatus for performing the process
AssigneeCampagnie Generale des Matieres Nucleaires
InventorsVeronique Federici, Eric Tronche, Germain Lacoste
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Abstract
According to the invention, a consumable anode constituted by a metal alloy incorporates between 20 and 70 wt. % iron, between 20 and 40 wt. % cobalt and between 5 and 30 wt. % aluminium. To these basic constituents can optionally be added elements such as nickel and/or titanium and/or copper and/or niobium. The decontamination process involves an electrodissolution of said anode.
Claims15
A process for decontamination of radioactive liquid effluents, comprising the steps of placing a consumable anode and a cathode in the liquid effluent in a reactor, bringing the pH of the effluent to a value equal to or above 1, and establishing a direct current between the electrodes while maintaining the potential of the anode at a value equal to or above 2 V/NHE until the consumed electricity quantity is equal to or above 8 coulombs/milliliter, wherein said consumable anode is constituted by a metal alloy comprising between 20 and 70 wt. % iron, between 20 and 40 wt. % cobalt and between 5 and 30 wt. % aluminum, the total sum of the weight percentages of these three elements being equal to or below 100.
A process for decontamination of radioactive liquid effluents, containing antimony, or ruthenium, or strontium, or cesium or actinides, comprising the steps of placing a consumable anode and a cathode in the liquid effluent in a reactor, bringing the pH of the effluent to a value equal to or above 1, and establishing a direct current between the electrodes while maintaining the potential of the anode at a value equal to or above 2 V/NHE, wherein said consumable anode is constituted by a metal alloy comprising between 20 and 70 wt. % iron, between 20 and 40 wt. % cobalt and between 5 and 30 wt. % aluminum, the total sum of the weight percentages of these three elements being equal to or below 100.
Dependencies are inferred from the claim text.