Modeling the Interaction Between Compacted Bentonite Clay and Hyperalkaline Solution

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

Abstract

Spent nuclear fuel is planned to be disposed of in deep underground repositories in many countries, including Finland. An essential part of the Finnish final repository concept is a compacted bentonite buffer. Unfortunately, experimental work is only of limited use when predicting the long-term stability of bentonite in repository conditions, and therefore complementary modeling tools and method development are needed to gain confidence in the safety of the disposal. This work involves the modeling of the chemical interaction between inflowing hyperalkaline solution—envisaged to constitute a risk to the long-term chemical stability of the buffer—and bentonite clay in a column filled with crushed rock and compacted bentonite. The main interest was in the cation-exchange equilibria and mineral alterations in bentonite. TOUGHREACT was found to be a useful modeling tool in stability studies of the bentonite. Especially good results were gained for the cation-exchanger composition.
Original languageEnglish
Title of host publicationProceedings of the TOUGH Symposium 2009
Subtitle of host publicationSeptember 14—16, 2009
Place of PublicationBerkeley
Pages277-282
Publication statusPublished - 2009
MoE publication typeA4 Article in a conference publication
EventTOUGH Symposium 2009 - Berkeley, United States
Duration: 14 Sep 200916 Sep 2009

Conference

ConferenceTOUGH Symposium 2009
CountryUnited States
CityBerkeley
Period14/09/0916/09/09

Fingerprint

bentonite
clay
repository
modeling
mineral alteration
ion exchange
cation
safety
rock

Keywords

  • THC
  • bentonite
  • modelling
  • cement

Cite this

Tanhua-Tyrkkö, M., Olin, M., & Lehikoinen, J. (2009). Modeling the Interaction Between Compacted Bentonite Clay and Hyperalkaline Solution. In Proceedings of the TOUGH Symposium 2009: September 14—16, 2009 (pp. 277-282). Berkeley.
Tanhua-Tyrkkö, Merja ; Olin, Markus ; Lehikoinen, Jarmo. / Modeling the Interaction Between Compacted Bentonite Clay and Hyperalkaline Solution. Proceedings of the TOUGH Symposium 2009: September 14—16, 2009. Berkeley, 2009. pp. 277-282
@inproceedings{010f18924d784f3bb80a33980d0c7ced,
title = "Modeling the Interaction Between Compacted Bentonite Clay and Hyperalkaline Solution",
abstract = "Spent nuclear fuel is planned to be disposed of in deep underground repositories in many countries, including Finland. An essential part of the Finnish final repository concept is a compacted bentonite buffer. Unfortunately, experimental work is only of limited use when predicting the long-term stability of bentonite in repository conditions, and therefore complementary modeling tools and method development are needed to gain confidence in the safety of the disposal. This work involves the modeling of the chemical interaction between inflowing hyperalkaline solution—envisaged to constitute a risk to the long-term chemical stability of the buffer—and bentonite clay in a column filled with crushed rock and compacted bentonite. The main interest was in the cation-exchange equilibria and mineral alterations in bentonite. TOUGHREACT was found to be a useful modeling tool in stability studies of the bentonite. Especially good results were gained for the cation-exchanger composition.",
keywords = "THC, bentonite, modelling, cement",
author = "Merja Tanhua-Tyrkk{\"o} and Markus Olin and Jarmo Lehikoinen",
year = "2009",
language = "English",
pages = "277--282",
booktitle = "Proceedings of the TOUGH Symposium 2009",

}

Tanhua-Tyrkkö, M, Olin, M & Lehikoinen, J 2009, Modeling the Interaction Between Compacted Bentonite Clay and Hyperalkaline Solution. in Proceedings of the TOUGH Symposium 2009: September 14—16, 2009. Berkeley, pp. 277-282, TOUGH Symposium 2009, Berkeley, United States, 14/09/09.

Modeling the Interaction Between Compacted Bentonite Clay and Hyperalkaline Solution. / Tanhua-Tyrkkö, Merja; Olin, Markus; Lehikoinen, Jarmo.

Proceedings of the TOUGH Symposium 2009: September 14—16, 2009. Berkeley, 2009. p. 277-282.

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

TY - GEN

T1 - Modeling the Interaction Between Compacted Bentonite Clay and Hyperalkaline Solution

AU - Tanhua-Tyrkkö, Merja

AU - Olin, Markus

AU - Lehikoinen, Jarmo

PY - 2009

Y1 - 2009

N2 - Spent nuclear fuel is planned to be disposed of in deep underground repositories in many countries, including Finland. An essential part of the Finnish final repository concept is a compacted bentonite buffer. Unfortunately, experimental work is only of limited use when predicting the long-term stability of bentonite in repository conditions, and therefore complementary modeling tools and method development are needed to gain confidence in the safety of the disposal. This work involves the modeling of the chemical interaction between inflowing hyperalkaline solution—envisaged to constitute a risk to the long-term chemical stability of the buffer—and bentonite clay in a column filled with crushed rock and compacted bentonite. The main interest was in the cation-exchange equilibria and mineral alterations in bentonite. TOUGHREACT was found to be a useful modeling tool in stability studies of the bentonite. Especially good results were gained for the cation-exchanger composition.

AB - Spent nuclear fuel is planned to be disposed of in deep underground repositories in many countries, including Finland. An essential part of the Finnish final repository concept is a compacted bentonite buffer. Unfortunately, experimental work is only of limited use when predicting the long-term stability of bentonite in repository conditions, and therefore complementary modeling tools and method development are needed to gain confidence in the safety of the disposal. This work involves the modeling of the chemical interaction between inflowing hyperalkaline solution—envisaged to constitute a risk to the long-term chemical stability of the buffer—and bentonite clay in a column filled with crushed rock and compacted bentonite. The main interest was in the cation-exchange equilibria and mineral alterations in bentonite. TOUGHREACT was found to be a useful modeling tool in stability studies of the bentonite. Especially good results were gained for the cation-exchanger composition.

KW - THC

KW - bentonite

KW - modelling

KW - cement

M3 - Conference article in proceedings

SP - 277

EP - 282

BT - Proceedings of the TOUGH Symposium 2009

CY - Berkeley

ER -

Tanhua-Tyrkkö M, Olin M, Lehikoinen J. Modeling the Interaction Between Compacted Bentonite Clay and Hyperalkaline Solution. In Proceedings of the TOUGH Symposium 2009: September 14—16, 2009. Berkeley. 2009. p. 277-282