Modelling of the oxide film growth and layer restructuring on stainless steels in LWRs

Iva Betova, Martin Bojinov, Petri Kinnunen, Timo Saario, Klas Lundgren

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

The ultimate goal of this work is to develop a deterministic model for corrosion and activity incorporation in oxides on construction materials in nuclear power plant coolant circuits. The proposed model is based on fundamental physico-chemical mechanisms.
As a result of the calculation procedure developed on the basis of the model, the kinetic and transport parameters of the growth and restructuring of the oxides on austenitic stainless steels and nickel based alloys in Light Water Reactors (LWRs) were determined from fittings of the Mixed-Conduction Model for oxide films to in-situ impedance data as well as ex-situ analytical results on the thickness and composition of such layers.
Subsequently, the determination of the kinetic and transport parameters for the incorporation of Zn in the bulk of the inner layer oxides on stainless steels was performed on the fitting of experimental depth profiles of this element to the diffusion-migration equations for the non-steady state transport of minor species.
The calculational results are discussed in terms of the influence of incorporation of solution-originating species on the kinetics of film growth and layer restructuring
Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition, MS and T'07 - "Exploring Structure, Processing, and Applications Across Multiple Materials Systems". Detroit, Michigan, USA, 16 - 20 Sept. 2008
Pages952-964
Volume2
Publication statusPublished - 2007
MoE publication typeA4 Article in a conference publication
EventMaterials Science & Technology Conference and Exhibition, MS and T 07. Exploring Structure, Processing, and Applications Across Multiple Materials Systems - Detroit, Michigan, United States
Duration: 16 Sep 200720 Sep 2007

Conference

ConferenceMaterials Science & Technology Conference and Exhibition, MS and T 07. Exploring Structure, Processing, and Applications Across Multiple Materials Systems
Abbreviated titleMS and T '07
CountryUnited States
CityDetroit, Michigan
Period16/09/0720/09/07

Keywords

  • stainless steel
  • nickel-based alloys
  • high-temperature water
  • oxide growth
  • kinetic model

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    Betova, I., Bojinov, M., Kinnunen, P., Saario, T., & Lundgren, K. (2007). Modelling of the oxide film growth and layer restructuring on stainless steels in LWRs. In Materials Science and Technology Conference and Exhibition, MS and T'07 - "Exploring Structure, Processing, and Applications Across Multiple Materials Systems". Detroit, Michigan, USA, 16 - 20 Sept. 2008 (Vol. 2, pp. 952-964)