Patent Number: 
Section: claims

1. A method of lowering the electrochemical corrosion potential of metal alloy cooling tubes in a water-cooled nuclear reactor, said tubes having a surface exposed to an aqueous liquid containing hydrogen peroxide, comprising the step of injecting matter into said liquid, wherein said matter is selected from the group consisting of elemental manganese, elemental copper, elemental cadmium, oxides thereof, and mixtures thereof. 2. The method as claimed in  claim 1  wherein said metal alloy is selected from the group consisting of carbon steel, alloy steel, zirconium stainless steel, nickel-based alloys, cobalt-based alloys and mixtures thereof. claim 1 3. The method as claimed in  claim 1  wherein said matter is capable of adsorbing said hydrogen peroxide. claim 1 4. The method as claimed in  claim 3 , wherein said metal alloy is a zirconium alloy and said matter is selected from the group consisting of elemental manganese, oxides thereof, and mixtures thereof. claim 3