The fate of Si and Fe while nuclear glass alters with steel and clay

Abstract The French concept developed to dispose high-level radioactive waste in geological repository relies on glassy waste forms, isolated from the claystone host rock by steel containers. Understanding interactions between glass and surrounding materials is key for assessing the performance of a...

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Autores principales:	C. Carriere, P. Dillmann, S. Gin, D. Neff, L. Gentaz, F. Bruguier, I. Monnet, E. Gardes, M. Saheb, E. Foy, N. Nuns, A. Delanoë, J. J. Dynes, N. Michau, C. Martin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/035c9f5eb29b48ca96b266d649e1658e
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spelling	oai:doaj.org-article:035c9f5eb29b48ca96b266d649e1658e2021-12-02T18:15:42ZThe fate of Si and Fe while nuclear glass alters with steel and clay10.1038/s41529-021-00160-x2397-2106https://doaj.org/article/035c9f5eb29b48ca96b266d649e1658e2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41529-021-00160-xhttps://doaj.org/toc/2397-2106Abstract The French concept developed to dispose high-level radioactive waste in geological repository relies on glassy waste forms, isolated from the claystone host rock by steel containers. Understanding interactions between glass and surrounding materials is key for assessing the performance of a such system. Here, isotopically tagged SON68 glass, steel and claystone were studied through an integrated mockup conducted at 50 °C for 2.5 years. Post-mortem analyses were performed from nanometric to millimetric scales using TEM, STXM, ToF-SIMS and SEM techniques. The glass alteration layer consisted of a crystallized Fe-rich smectite mineral, close to nontronite, supporting a dissolution/reprecipitation controlling mechanism for glass alteration. The mean glass dissolution rate ranged between 1.6 × 10−2 g m−2 d−1 to 3.0 × 10−2 g m−2 d−1, a value only 3–5 times lower than the initial dissolution rate. Thermodynamic calculations highlighted a competition between nontronite and protective gel, explaining why in the present conditions the formation of a protective layer is prevented.C. CarriereP. DillmannS. GinD. NeffL. GentazF. BruguierI. MonnetE. GardesM. SahebE. FoyN. NunsA. DelanoëJ. J. DynesN. MichauC. MartinNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ENnpj Materials Degradation, Vol 5, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 C. Carriere P. Dillmann S. Gin D. Neff L. Gentaz F. Bruguier I. Monnet E. Gardes M. Saheb E. Foy N. Nuns A. Delanoë J. J. Dynes N. Michau C. Martin The fate of Si and Fe while nuclear glass alters with steel and clay
description	Abstract The French concept developed to dispose high-level radioactive waste in geological repository relies on glassy waste forms, isolated from the claystone host rock by steel containers. Understanding interactions between glass and surrounding materials is key for assessing the performance of a such system. Here, isotopically tagged SON68 glass, steel and claystone were studied through an integrated mockup conducted at 50 °C for 2.5 years. Post-mortem analyses were performed from nanometric to millimetric scales using TEM, STXM, ToF-SIMS and SEM techniques. The glass alteration layer consisted of a crystallized Fe-rich smectite mineral, close to nontronite, supporting a dissolution/reprecipitation controlling mechanism for glass alteration. The mean glass dissolution rate ranged between 1.6 × 10−2 g m−2 d−1 to 3.0 × 10−2 g m−2 d−1, a value only 3–5 times lower than the initial dissolution rate. Thermodynamic calculations highlighted a competition between nontronite and protective gel, explaining why in the present conditions the formation of a protective layer is prevented.
format	article
author	C. Carriere P. Dillmann S. Gin D. Neff L. Gentaz F. Bruguier I. Monnet E. Gardes M. Saheb E. Foy N. Nuns A. Delanoë J. J. Dynes N. Michau C. Martin
author_facet	C. Carriere P. Dillmann S. Gin D. Neff L. Gentaz F. Bruguier I. Monnet E. Gardes M. Saheb E. Foy N. Nuns A. Delanoë J. J. Dynes N. Michau C. Martin
author_sort	C. Carriere
title	The fate of Si and Fe while nuclear glass alters with steel and clay
title_short	The fate of Si and Fe while nuclear glass alters with steel and clay
title_full	The fate of Si and Fe while nuclear glass alters with steel and clay
title_fullStr	The fate of Si and Fe while nuclear glass alters with steel and clay
title_full_unstemmed	The fate of Si and Fe while nuclear glass alters with steel and clay
title_sort	fate of si and fe while nuclear glass alters with steel and clay
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/035c9f5eb29b48ca96b266d649e1658e
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The fate of Si and Fe while nuclear glass alters with steel and clay

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