The swelling of Eurobitum by water uptake and its geo-mechanical consequences - Status 2010

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The swelling of Eurobitum by water uptake and its geo-mechanical consequences - Status 2010. / Mariën, An; Bleyen, Nele; Valcke, Elie.

0 ed. SCK CEN, 2013. 256 p. (SCK•CEN Reports; No. ER-218).

Research output: Report/bookER - External reportpeer-review

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@book{0dd519c2e0ff4eafb7aa9cba546d6b99,
title = "The swelling of Eurobitum by water uptake and its geo-mechanical consequences - Status 2010",
abstract = "ONDRAF/NIRAS proposes the direct underground disposal of Eurobitum bituminized radioactive waste in a geologically stable clay formation as the preferred long-term solution for this waste. Compatibility studies are ongoing at the SCK•CEN to investigate the geo-mechanical and geo-chemical perturbation of the Boom Clay as a consequence of the osmosis-induced uptake by the large amounts of dehydrated and hygroscopic salts that are embedded in an efficient semi-permeable bitumen membrane. In this report we discuss the results of (i) theoretical calculations, (ii) laboratory water uptake experiments, and (iii) the development of a chemo-hydro-mechanical (CHM) formulation for Eurobitum to evaluate the geo-mechanical perturbation of the Boom Clay by swelling Eurobitum. The theoretical calculations demonstrated that from a mechanical point of view the 'direct' geological disposal of Eurobitum seems to be possible as long as the number of drums per gallery cross section is limited. The water uptake experiments yielded a comprehensive understanding of the phenomenology of the water uptake by Eurobitum in restricted swelling conditions. The CHM formulation for Eurobitum can reproduce successfully the key features of the results of the water uptake tests with inactive 'reference' Eurobitum, at least for a period in which the samples are only partially hydrated.",
keywords = "Eurobitum, bituminized radioactive waste, NaNO3, osmosis, water uptake, swelling, pressure increase, geo-mechanical perturbation, theoretical calculations, water uptake tests, chemo-hydro-mechanical formulation",
author = "An Mari{\"e}n and Nele Bleyen and Elie Valcke",
note = "RN - ER-218 Score = 2",
year = "2013",
month = feb,
language = "English",
series = "SCK•CEN Reports",
publisher = "SCK CEN",
number = "ER-218",
address = "Belgium",
edition = "0",

}

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TY - BOOK

T1 - The swelling of Eurobitum by water uptake and its geo-mechanical consequences - Status 2010

AU - Mariën, An

AU - Bleyen, Nele

AU - Valcke, Elie

N1 - RN - ER-218 Score = 2

PY - 2013/2

Y1 - 2013/2

N2 - ONDRAF/NIRAS proposes the direct underground disposal of Eurobitum bituminized radioactive waste in a geologically stable clay formation as the preferred long-term solution for this waste. Compatibility studies are ongoing at the SCK•CEN to investigate the geo-mechanical and geo-chemical perturbation of the Boom Clay as a consequence of the osmosis-induced uptake by the large amounts of dehydrated and hygroscopic salts that are embedded in an efficient semi-permeable bitumen membrane. In this report we discuss the results of (i) theoretical calculations, (ii) laboratory water uptake experiments, and (iii) the development of a chemo-hydro-mechanical (CHM) formulation for Eurobitum to evaluate the geo-mechanical perturbation of the Boom Clay by swelling Eurobitum. The theoretical calculations demonstrated that from a mechanical point of view the 'direct' geological disposal of Eurobitum seems to be possible as long as the number of drums per gallery cross section is limited. The water uptake experiments yielded a comprehensive understanding of the phenomenology of the water uptake by Eurobitum in restricted swelling conditions. The CHM formulation for Eurobitum can reproduce successfully the key features of the results of the water uptake tests with inactive 'reference' Eurobitum, at least for a period in which the samples are only partially hydrated.

AB - ONDRAF/NIRAS proposes the direct underground disposal of Eurobitum bituminized radioactive waste in a geologically stable clay formation as the preferred long-term solution for this waste. Compatibility studies are ongoing at the SCK•CEN to investigate the geo-mechanical and geo-chemical perturbation of the Boom Clay as a consequence of the osmosis-induced uptake by the large amounts of dehydrated and hygroscopic salts that are embedded in an efficient semi-permeable bitumen membrane. In this report we discuss the results of (i) theoretical calculations, (ii) laboratory water uptake experiments, and (iii) the development of a chemo-hydro-mechanical (CHM) formulation for Eurobitum to evaluate the geo-mechanical perturbation of the Boom Clay by swelling Eurobitum. The theoretical calculations demonstrated that from a mechanical point of view the 'direct' geological disposal of Eurobitum seems to be possible as long as the number of drums per gallery cross section is limited. The water uptake experiments yielded a comprehensive understanding of the phenomenology of the water uptake by Eurobitum in restricted swelling conditions. The CHM formulation for Eurobitum can reproduce successfully the key features of the results of the water uptake tests with inactive 'reference' Eurobitum, at least for a period in which the samples are only partially hydrated.

KW - Eurobitum

KW - bituminized radioactive waste

KW - NaNO3

KW - osmosis

KW - water uptake

KW - swelling

KW - pressure increase

KW - geo-mechanical perturbation

KW - theoretical calculations

KW - water uptake tests

KW - chemo-hydro-mechanical formulation

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_123508

UR - http://knowledgecentre.sckcen.be/so2/bibref/10065

M3 - ER - External report

T3 - SCK•CEN Reports

BT - The swelling of Eurobitum by water uptake and its geo-mechanical consequences - Status 2010

PB - SCK CEN

ER -

ID: 322713