Determination of dissolution rates in vitrified high and medium level waste in a cementitious environment

Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

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Determination of dissolution rates in vitrified high and medium level waste in a cementitious environment. / Ferrand, Karine; Lemmens, Karel; Gielen, Ben; Vercauter, Regina; Druyts, Frank (Peer reviewer).

Cementitious materials in safety cases for geological repositories for radioactive waste: role, evolution and interaction. Paris, France, 2012. p. 205-208 (NEA/RWM report; No. NEA/RWM/R(2012)3).

Research output: Contribution to report/book/conference proceedingsIn-proceedings paper

Harvard

Ferrand, K, Lemmens, K, Gielen, B, Vercauter, R & Druyts, F 2012, Determination of dissolution rates in vitrified high and medium level waste in a cementitious environment. in Cementitious materials in safety cases for geological repositories for radioactive waste: role, evolution and interaction. NEA/RWM report, no. NEA/RWM/R(2012)3, Paris, France, pp. 205-208, Cementitious Materials in Safety Cases for Geological Repositories for Radioactive Waste: Role, Evolution and Interactions, Brussels, Belgium, 2009-11-17.

APA

Ferrand, K., Lemmens, K., Gielen, B., Vercauter, R., & Druyts, F. (2012). Determination of dissolution rates in vitrified high and medium level waste in a cementitious environment. In Cementitious materials in safety cases for geological repositories for radioactive waste: role, evolution and interaction (pp. 205-208). (NEA/RWM report; No. NEA/RWM/R(2012)3). Paris, France.

Vancouver

Ferrand K, Lemmens K, Gielen B, Vercauter R, Druyts F. Determination of dissolution rates in vitrified high and medium level waste in a cementitious environment. In Cementitious materials in safety cases for geological repositories for radioactive waste: role, evolution and interaction. Paris, France. 2012. p. 205-208. (NEA/RWM report; NEA/RWM/R(2012)3).

Author

Ferrand, Karine ; Lemmens, Karel ; Gielen, Ben ; Vercauter, Regina ; Druyts, Frank. / Determination of dissolution rates in vitrified high and medium level waste in a cementitious environment. Cementitious materials in safety cases for geological repositories for radioactive waste: role, evolution and interaction. Paris, France, 2012. pp. 205-208 (NEA/RWM report; NEA/RWM/R(2012)3).

Bibtex - Download

@inproceedings{f2e7ea189d4c4feeaf61970a67ab4338,
title = "Determination of dissolution rates in vitrified high and medium level waste in a cementitious environment",
abstract = "Glass leaching tests were performed at 30°C in cementitious water at pH 13.5 with or without cement. These experiments have allowed to propose a pessimistic range of dissolution rates of 0.025-0.082 g.m-2.d-1 for the SON68 glass and 0.2-0.3 g.m-2.d-1 for the SM539 glass. These rates can be used as preliminary values in performance assessment calculations. Tthe presence of cement maintains the dissolution rate at the high initial rate,because it acts as a sink for Si and Al. The mechanism responsible for the fixation of Si and Al on the cement seems to depend on the glass composition. For SM539, there is ample evidence for secondary phase formation. For SON68, there is no such evidence, and the fixation mechanisms is not clear . Because the pH, and Si, Ca and Al concentrations were stable in the tests with cement, the dissolution rate may remain constant for a long time. So there is no clear evidence for the existence of a lower long term rate, although this can be expected at sufficient reaction progress. The proposed dissolution rates are considerably higher than the long term rate observed in neutral pH conditions, which are expected to be lower than 10-4 g.m-2.d-1.",
keywords = "concrete, cement, vitrified waste, disposal, Supercontainer",
author = "Karine Ferrand and Karel Lemmens and Ben Gielen and Regina Vercauter and Frank Druyts",
note = "Score = 3",
year = "2012",
month = "3",
language = "English",
series = "NEA/RWM report",
number = "NEA/RWM/R(2012)3",
pages = "205--208",
booktitle = "Cementitious materials in safety cases for geological repositories for radioactive waste: role, evolution and interaction",

}

RIS - Download

TY - GEN

T1 - Determination of dissolution rates in vitrified high and medium level waste in a cementitious environment

AU - Ferrand, Karine

AU - Lemmens, Karel

AU - Gielen, Ben

AU - Vercauter, Regina

A2 - Druyts, Frank

N1 - Score = 3

PY - 2012/3

Y1 - 2012/3

N2 - Glass leaching tests were performed at 30°C in cementitious water at pH 13.5 with or without cement. These experiments have allowed to propose a pessimistic range of dissolution rates of 0.025-0.082 g.m-2.d-1 for the SON68 glass and 0.2-0.3 g.m-2.d-1 for the SM539 glass. These rates can be used as preliminary values in performance assessment calculations. Tthe presence of cement maintains the dissolution rate at the high initial rate,because it acts as a sink for Si and Al. The mechanism responsible for the fixation of Si and Al on the cement seems to depend on the glass composition. For SM539, there is ample evidence for secondary phase formation. For SON68, there is no such evidence, and the fixation mechanisms is not clear . Because the pH, and Si, Ca and Al concentrations were stable in the tests with cement, the dissolution rate may remain constant for a long time. So there is no clear evidence for the existence of a lower long term rate, although this can be expected at sufficient reaction progress. The proposed dissolution rates are considerably higher than the long term rate observed in neutral pH conditions, which are expected to be lower than 10-4 g.m-2.d-1.

AB - Glass leaching tests were performed at 30°C in cementitious water at pH 13.5 with or without cement. These experiments have allowed to propose a pessimistic range of dissolution rates of 0.025-0.082 g.m-2.d-1 for the SON68 glass and 0.2-0.3 g.m-2.d-1 for the SM539 glass. These rates can be used as preliminary values in performance assessment calculations. Tthe presence of cement maintains the dissolution rate at the high initial rate,because it acts as a sink for Si and Al. The mechanism responsible for the fixation of Si and Al on the cement seems to depend on the glass composition. For SM539, there is ample evidence for secondary phase formation. For SON68, there is no such evidence, and the fixation mechanisms is not clear . Because the pH, and Si, Ca and Al concentrations were stable in the tests with cement, the dissolution rate may remain constant for a long time. So there is no clear evidence for the existence of a lower long term rate, although this can be expected at sufficient reaction progress. The proposed dissolution rates are considerably higher than the long term rate observed in neutral pH conditions, which are expected to be lower than 10-4 g.m-2.d-1.

KW - concrete

KW - cement

KW - vitrified waste

KW - disposal

KW - Supercontainer

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_120890

UR - http://knowledgecentre.sckcen.be/so2/bibref/9036

M3 - In-proceedings paper

T3 - NEA/RWM report

SP - 205

EP - 208

BT - Cementitious materials in safety cases for geological repositories for radioactive waste: role, evolution and interaction

CY - Paris, France

ER -

ID: 165427