Affiliation:
1. CanmetMATERIALS, Natural Resources Canada Hamilton Ontario Canada
2. Nuclear Waste Management Organization Toronto Ontario Canada
3. National Cooperative for the Disposal of Radioactive Waste Wettingen Switzerland
4. Swedish Nuclear Fuel and Waste Management Co. Solna Sweden
Abstract
AbstractCopper has been proposed as a corrosion barrier for used fuel containers due to its thermodynamic stability under the anoxic conditions relevant to a deep geological repository. Laboratory simulations of anticipated repository conditions have demonstrated the production of small quantities of hydrogen gas, which have been interpreted as being indicative of an oxidation (corrosion) process. This work reports new corrosion results for repository‐relevant materials: electrodeposited copper, cold spray copper and junction material under Canadian and Swiss simulated ground waters. The attribution of the recorded hydrogen suggests corrosion is limited to the outermost atomic layers of copper cladding. However, the origins of the hydrogen have not been conclusively determined. Three thermal desorption methods have been used to investigate the outgassing of hydrogen from electrodeposited copper which may permit a more accurate interpretation of the hydrogen evolution profile from corrosion cells.
Funder
Svensk Kärnbränslehantering
Nuclear Waste Management Organization
Subject
Materials Chemistry,Metals and Alloys,Surfaces, Coatings and Films,Mechanical Engineering,Mechanics of Materials,Environmental Chemistry,Materials Chemistry,Metals and Alloys,Surfaces, Coatings and Films,Mechanical Engineering,Mechanics of Materials,Environmental Chemistry,Materials Chemistry,Metals and Alloys,Surfaces, Coatings and Films,Mechanical Engineering,Mechanics of Materials,Environmental Chemistry
Reference15 articles.
1. Technical Report NWMO‐TR‐2022‐01 inTechnical Program for Long‐Term Management of Canada's Used Nuclear Fuel ‒ Annual Report 2021(Eds: S. Briggs) NWMO Toronto Canada2022.
2. Technical Report NTB 21‐01E inWaste Management Programme 2021 of the Waste Producers Nagra Wettingen Switzerland2021.
3. Technical Report SKB TR‐21‐01 inPost‐closure safety for the final repository for spent nuclear fuel at Forsmark SKB Solna Sweden2021.
4. Communication—A Method to Measure Extremely Low Corrosion Rates of Copper Metal in Anoxic Aqueous Media
5. The anoxic corrosion behaviour of copper in the presence of chloride and sulphide