Vertical distribution of H14CO_3 transport parameters in Boom Clay in the Mol-1 borehole (Mol, Belgium)

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Vertical distribution of H14CO_3 transport parameters in Boom Clay in the Mol-1 borehole (Mol, Belgium). / Aertsens, Marc; Van Gompel, Marc; De Cannière, Pierre; Maes, Norbert; Dierckx, A.

In: Physics and Chemistry of the Earth, Vol. 33, Supplement 1, 10.2008, p. S61-S66.

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@article{8e0c0e02320c4c079b43934152940360,
title = "Vertical distribution of H14CO_3 transport parameters in Boom Clay in the Mol-1 borehole (Mol, Belgium)",
abstract = "An important question for the performance assessment of a potential geological waste disposal site for radioactive waste in Boom Clay is: can the Boom Clay be considered as a homogeneous clay layer from the point of view of its migration properties? Therefore, the hydraulic conductivity and the transport parameters of tritiated water (HTO) and two critical radionuclides (129I- and H14CO3-) in Boom Clay and the upper lying sands of Eigenbilzen or Voort have been determined on cores taken from different depths in the Mol-1 borehole. In the range from 191 m to 281 m depth, the Boom Clay Formation can be considered as homogeneous with respect to the hydraulic conductivity and the transport parameters of H14CO3-. The value of the vertical hydraulic conductivity is around 2.5 - 3 10-12 m/s. The average apparent diffusion coefficient Dapp of H14CO3- in the direction perpendicular to the bedding plane is (6  3) 10-11 m2/s. The product R of the diffusion accessible porosity  and the retardation factor R of H14CO3- is 0.26  0.03, lying between the value of iodide (R = 0.16) and of HTO (R = 0.37). Due to anion exclusion, iodide has a lower porosity than HTO.",
keywords = "bicarbonate, diffusion accessible porosity, apparent diffusion coefficient, dispersion coefficient, boom clay, hydrualic conductivity",
author = "Marc Aertsens and {Van Gompel}, Marc and {De Canni{\`e}re}, Pierre and Norbert Maes and A. Dierckx",
note = "Score = 10; Clays in natural and engineered barriers for radioactive waste confinement ; Conference date: 17-09-2007 Through 20-09-2007",
year = "2008",
month = oct,
doi = "10.1016/j.pce.2008.10.060",
language = "English",
volume = "33, Supplement 1",
pages = "S61--S66",
journal = "Physics and Chemistry of the Earth",
issn = "1474-7065",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Vertical distribution of H14CO_3 transport parameters in Boom Clay in the Mol-1 borehole (Mol, Belgium)

AU - Aertsens, Marc

AU - Van Gompel, Marc

AU - De Cannière, Pierre

AU - Maes, Norbert

AU - Dierckx, A.

N1 - Score = 10

PY - 2008/10

Y1 - 2008/10

N2 - An important question for the performance assessment of a potential geological waste disposal site for radioactive waste in Boom Clay is: can the Boom Clay be considered as a homogeneous clay layer from the point of view of its migration properties? Therefore, the hydraulic conductivity and the transport parameters of tritiated water (HTO) and two critical radionuclides (129I- and H14CO3-) in Boom Clay and the upper lying sands of Eigenbilzen or Voort have been determined on cores taken from different depths in the Mol-1 borehole. In the range from 191 m to 281 m depth, the Boom Clay Formation can be considered as homogeneous with respect to the hydraulic conductivity and the transport parameters of H14CO3-. The value of the vertical hydraulic conductivity is around 2.5 - 3 10-12 m/s. The average apparent diffusion coefficient Dapp of H14CO3- in the direction perpendicular to the bedding plane is (6  3) 10-11 m2/s. The product R of the diffusion accessible porosity  and the retardation factor R of H14CO3- is 0.26  0.03, lying between the value of iodide (R = 0.16) and of HTO (R = 0.37). Due to anion exclusion, iodide has a lower porosity than HTO.

AB - An important question for the performance assessment of a potential geological waste disposal site for radioactive waste in Boom Clay is: can the Boom Clay be considered as a homogeneous clay layer from the point of view of its migration properties? Therefore, the hydraulic conductivity and the transport parameters of tritiated water (HTO) and two critical radionuclides (129I- and H14CO3-) in Boom Clay and the upper lying sands of Eigenbilzen or Voort have been determined on cores taken from different depths in the Mol-1 borehole. In the range from 191 m to 281 m depth, the Boom Clay Formation can be considered as homogeneous with respect to the hydraulic conductivity and the transport parameters of H14CO3-. The value of the vertical hydraulic conductivity is around 2.5 - 3 10-12 m/s. The average apparent diffusion coefficient Dapp of H14CO3- in the direction perpendicular to the bedding plane is (6  3) 10-11 m2/s. The product R of the diffusion accessible porosity  and the retardation factor R of H14CO3- is 0.26  0.03, lying between the value of iodide (R = 0.16) and of HTO (R = 0.37). Due to anion exclusion, iodide has a lower porosity than HTO.

KW - bicarbonate

KW - diffusion accessible porosity

KW - apparent diffusion coefficient

KW - dispersion coefficient

KW - boom clay

KW - hydrualic conductivity

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_94897

UR - http://knowledgecentre.sckcen.be/so2/bibref/5594

U2 - 10.1016/j.pce.2008.10.060

DO - 10.1016/j.pce.2008.10.060

M3 - Article

VL - 33, Supplement 1

SP - S61-S66

JO - Physics and Chemistry of the Earth

JF - Physics and Chemistry of the Earth

SN - 1474-7065

T2 - Clays in natural and engineered barriers for radioactive waste confinement

Y2 - 17 September 2007 through 20 September 2007

ER -

ID: 107376