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Stress corrosion cracking susceptibility of P285NH and API 5L X65 steel grades in the high-level radioactive waste repository cell concept
RISE Research Institutes of Sweden, Materials and Production, Corrosion. (Institut de la Corrosion)ORCID iD: 0000-0001-9243-4508
Andra, France.
Andra, France.
RISE Research Institutes of Sweden, Materials and Production, Corrosion. Exacorr, France. (Institut de la Corrosion)
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2021 (English)In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, no 1-2, p. 154-165Article in journal (Refereed) Published
Abstract [en]

Since 2014, the concept developed for the disposal of high-level radioactive waste in the French deep geological repository project Cigéo includes a cement-based grout material. This cement-based grout material will be injected between the casing and the claystone to neutralize the potential acidity resulting from the claystone oxidation induced by the drilling process of the disposal cell. In these conditions of pH (around 10.5) and temperature (90°C, maximum expected during the disposal), the metallic materials could be sensitive to stress corrosion cracking (SCC). In this project, different environments (aerated or deaerated, at room temperature or at 90°C) and synthetic solutions are considered to reproduce the different periods expected during the long life repository. The project is based on electrochemical measurements (polarization curves to define the SCC critical domain of potentials), slow strain rate tensile tests, and long-term immersion for crack initiation and propagation tests.

Place, publisher, year, edition, pages
Wiley-VCH Verlag , 2021. no 1-2, p. 154-165
Keywords [en]
geological repository, radioactive waste, stress corrosion cracking, Cements, Cracks, Geological repositories, Grouting, Mortar, Radioactive waste disposal, Radioactive waste storage, Radioactive wastes, Radioactivity, Residual stresses, Steel corrosion, Strain rate, Tensile testing, Crack initiation and propagation, Deep geological repository, Electrochemical measurements, High level radioactive waste repositories, High level radioactive wastes, Long-term immersions, Slow strain rate tensile test, Stress corrosion cracking susceptibility
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Natural Sciences
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URN: urn:nbn:se:ri:diva-50118DOI: 10.1002/maco.202011842Scopus ID: 2-s2.0-85091488389OAI: oai:DiVA.org:ri-50118DiVA, id: diva2:1497174
Available from: 2020-11-04 Created: 2020-11-04 Last updated: 2023-05-26Bibliographically approved

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Bulidon, NicolasMendibide, Christophe

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