Corrosion of Carbon Steel Inside Used Nuclear Fuel Containers - 19492
- The University of Western Ontario, London, Ontario (Canada)
- Nuclear Waste Management Organization, Toronto, Ontario (Canada)
This paper presents an overview of the carbon steel (CS) corrosion research being conducted by the Radiation Assisted Materials Performance Science (RAMPS) group at Western University, in collaboration with the Canadian Nuclear Waste Management Organization (NWMO) and Canada Natural Science and Engineering Research Council (NSERC). The objective of our studies is to develop a high-fidelity CS corrosion dynamic model that can be used to assess the integrity of the current Canadian used fuel container (UFC) design with confidence. Our key findings, the implications of the findings on corrosion science in general, and the potential consequences of these results on the predictions for long-term UFC integrity are described. Results are presented on the following five themes: chemical kinetics of γ-radiolysis of liquid water and humid air, aqueous corrosion of CS under γ-radiation, corrosion of CS under small water volumes and water filled gaps, Liesegang ring formation in a gel medium, and radiation-induced iron oxide nanoparticle formation from dissolved metal ions. These studies together represent a detailed and integrated examination of the whole CS corrosion system, and in particular, its behaviour under γ-radiation. The key finding of this research is that under certain conditions, the CS corrosion system can exhibit non-linear dynamic behaviours - which can be seen in periodic precipitation patterns and oscillations in measurable system properties such as corrosion potential. This throws into question existing corrosion models that do not account for these types of behaviours. We describe the preliminary steps we have taken in integrating these new understandings into a CS corrosion dynamic model that will be able to make long-term predictions of CS corrosion in the UFC environment. (authors)
- Research Organization:
- WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (United States)
- OSTI ID:
- 23005366
- Report Number(s):
- INIS-US--21-WM-19492
- Country of Publication:
- United States
- Language:
- English
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