Leaching and migration of Np, Pu, and Am from α-doped SON68 HLW glass in contact with dense clay

Elie Valcke; Mireille Gysemans; Hugo Moors; Pierre Van Iseghem; Nicole Godon; Patrick Jollivet

doi:10.1557/proc-932-9.1

Leaching and migration of Np, Pu, and Am from α-doped SON68 HLW glass in contact with dense clay

Elie Valcke, Mireille Gysemans, Hugo Moors, Pierre Van Iseghem, Nicole Godon, Patrick Jollivet

Research output › peer-review

Abstract

In the frame of an integrated in situ test on the alteration of the SON68 reference glass in realistic disposal conditions, the leaching of Np, Pu, and Am from α-doped SON68 glass samples and their migration in three clay-based backfill materials at high density was measured. The addition of powdered glass frit to a Ca-bentonite decreased the glass alteration by two orders of magnitude, and resulted in a concomitant decrease of the radionuclide leaching in comparison with dried Boom Clay, which is the more agressive backfill. All actinides were selectively retained in the alteration layer, but the retention degree was lower for Np than for Pu and Am. All backfill materials proved to be efficient barriers against radionuclide migration. For nearly all radionuclides and backfill materials, the migration profile showed a contribution of colloidal transport.

Original language	English
Title of host publication	29th International Symposium on the Scientific Basis for Nuclear Waste Management XXIX
Place of Publication	Warrendale, United States
Publisher	Materials Research Society
Pages	999-1006
Number of pages	8
ISBN (Print)	1558998896, 9781558998896
DOIs	https://doi.org/10.1557/proc-932-9.1
State	Published - 2006
Event	2005 - MRS : 29th International Symposium on the Scientific Basis for Nuclear Waste Management - Gent Duration: 12 Sep 2005 → 16 Sep 2005

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	932
ISSN (Print)	0272-9172

Conference

Conference	2005 - MRS
Abbreviated title	MRS2005
Country/Territory	Belgium
City	Gent
Period	2005-09-12 → 2005-09-16

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1557/proc-932-9.1License: Unspecified

Cite this

Valcke, E., Gysemans, M., Moors, H., Van Iseghem, P., Godon, N., & Jollivet, P. (2006). Leaching and migration of Np, Pu, and Am from α-doped SON68 HLW glass in contact with dense clay. In 29th International Symposium on the Scientific Basis for Nuclear Waste Management XXIX (pp. 999-1006). (Materials Research Society Symposium Proceedings; Vol. 932). Materials Research Society. https://doi.org/10.1557/proc-932-9.1

Valcke, Elie ; Gysemans, Mireille ; Moors, Hugo et al. / Leaching and migration of Np, Pu, and Am from α-doped SON68 HLW glass in contact with dense clay. 29th International Symposium on the Scientific Basis for Nuclear Waste Management XXIX. Warrendale, United States : Materials Research Society, 2006. pp. 999-1006 (Materials Research Society Symposium Proceedings).

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title = "Leaching and migration of Np, Pu, and Am from α-doped SON68 HLW glass in contact with dense clay",

abstract = "In the frame of an integrated in situ test on the alteration of the SON68 reference glass in realistic disposal conditions, the leaching of Np, Pu, and Am from α-doped SON68 glass samples and their migration in three clay-based backfill materials at high density was measured. The addition of powdered glass frit to a Ca-bentonite decreased the glass alteration by two orders of magnitude, and resulted in a concomitant decrease of the radionuclide leaching in comparison with dried Boom Clay, which is the more agressive backfill. All actinides were selectively retained in the alteration layer, but the retention degree was lower for Np than for Pu and Am. All backfill materials proved to be efficient barriers against radionuclide migration. For nearly all radionuclides and backfill materials, the migration profile showed a contribution of colloidal transport.",

keywords = "Radionuclide migration, In-situ tests, HLW, Glass corrosion, Radionuclide leaching, Diffusion, Boom Clay, Waste disposal",

author = "Elie Valcke and Mireille Gysemans and Hugo Moors and {Van Iseghem}, Pierre and Nicole Godon and Patrick Jollivet",

note = "Score = 1; 2005 - MRS : 29th International Symposium on the Scientific Basis for Nuclear Waste Management, MRS2005 ; Conference date: 12-09-2005 Through 16-09-2005",

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Valcke, E , Gysemans, M , Moors, H, Van Iseghem, P, Godon, N & Jollivet, P 2006, Leaching and migration of Np, Pu, and Am from α-doped SON68 HLW glass in contact with dense clay. in 29th International Symposium on the Scientific Basis for Nuclear Waste Management XXIX. Materials Research Society Symposium Proceedings, vol. 932, Materials Research Society, Warrendale, United States, pp. 999-1006, 2005 - MRS , Gent, Belgium, 2005-09-12. https://doi.org/10.1557/proc-932-9.1

Leaching and migration of Np, Pu, and Am from α-doped SON68 HLW glass in contact with dense clay. / Valcke, Elie ; Gysemans, Mireille ; Moors, Hugo et al.
29th International Symposium on the Scientific Basis for Nuclear Waste Management XXIX. Warrendale, United States: Materials Research Society, 2006. p. 999-1006 (Materials Research Society Symposium Proceedings; Vol. 932).

Research output › peer-review

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AU - Valcke, Elie

AU - Gysemans, Mireille

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AU - Godon, Nicole

AU - Jollivet, Patrick

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AB - In the frame of an integrated in situ test on the alteration of the SON68 reference glass in realistic disposal conditions, the leaching of Np, Pu, and Am from α-doped SON68 glass samples and their migration in three clay-based backfill materials at high density was measured. The addition of powdered glass frit to a Ca-bentonite decreased the glass alteration by two orders of magnitude, and resulted in a concomitant decrease of the radionuclide leaching in comparison with dried Boom Clay, which is the more agressive backfill. All actinides were selectively retained in the alteration layer, but the retention degree was lower for Np than for Pu and Am. All backfill materials proved to be efficient barriers against radionuclide migration. For nearly all radionuclides and backfill materials, the migration profile showed a contribution of colloidal transport.

KW - Radionuclide migration

KW - In-situ tests

KW - HLW

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KW - Radionuclide leaching

KW - Diffusion

KW - Boom Clay

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BT - 29th International Symposium on the Scientific Basis for Nuclear Waste Management XXIX

PB - Materials Research Society

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ER -

Valcke E , Gysemans M , Moors H, Van Iseghem P, Godon N, Jollivet P. Leaching and migration of Np, Pu, and Am from α-doped SON68 HLW glass in contact with dense clay. In 29th International Symposium on the Scientific Basis for Nuclear Waste Management XXIX. Warrendale, United States: Materials Research Society. 2006. p. 999-1006. (Materials Research Society Symposium Proceedings). doi: 10.1557/proc-932-9.1