Overview of anaerobic corrosion of carbon steel radioactive waste packages in alkaline media in support of the Belgian supercontainer concept

Research output: Contribution to journalArticle

Authors

Institutes & Expert groups

  • Jacobs
  • CanmetMATERIALS
  • University of California - Berkeley Etcheverry Hall
  • NIRAS/ONDRAF

Documents & links

DOI

Abstract

The so‐called supercontainer concept is currently being considered as the reference design for the final disposal of vitrified high‐level radioactive waste and spent fuel in Belgium. It comprises a prefabricated Portland cement‐based buffer that completely surrounds a carbon steel overpack. In this highly alkaline environment (pH ~13.6), and under normal conditions (i.e., without the ingress of aggressive species), the carbon steel overpack will be protected by a passive oxide film, which is expected to result in very low uniform corrosion rates. Considering the long timescales applicable to waste disposal, determining accurate and reliable estimates of the uniform corrosion rate under anoxic conditions forms a very important part of the safety and feasibility strategy. It is also crucial to demonstrate that no other form of corrosion apart from uniform corrosion takes place. This paper presents the progress of the research that has been made since the LTC2016 Workshop (Toronto, Canada) on uniform corrosion, pitting corrosion and stress corrosion cracking behaviour of P355 QL2 grade carbon steel exposed to an artificial concrete pore water solution.

Details

Original languageEnglish
Pages (from-to)32-51
Number of pages20
JournalMaterials and Corrosion
Volume72
DOIs
Publication statusPublished - 1 Jan 2021
Event2019 - LTC: 7th International Workshop on Long-term Prediction of Corrosion Damage in Nuclear Waste Systems - Mercure Nancy Centre Gare Hotel, Nancy, France
Duration: 19 Nov 201921 Nov 2019
https://www.cefracor.org/fr/manifestations/7th-international-workshop-long-term-prediction-corrosion-damage-nuclear-waste

Keywords

  • Alkaline, Anaerobic, Carbon steel, Chloride, Concrete, Pitting corrosion, Stress corrosion cracking, Sulpide, Thiosulphate, Uniform corrosion

ID: 7138763