Comparison between in situ and laboratory diffusion studies of HTO and halides in Opalinus Clay from the Mont Terri
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| 024 | 7 | 0 | |a 10.1524/ract.92.9.781.54989 |2 doi |
| 035 | |a (NATIONALLICENCE)gruyter-10.1524/ract.92.9.781.54989 | ||
| 245 | 0 | 0 | |a Comparison between in situ and laboratory diffusion studies of HTO and halides in Opalinus Clay from the Mont Terri |h [Elektronische Daten] |c [Etienne Tevissen, J. M. Soler, P. Montarnal, A. Gautschi, Luc R. Van Loon] |
| 520 | 3 | |a A long-term single-borehole diffusion experiment (DI) using tritiated water (HTO) and stable iodide (127I-) was carried out In the Opalinus Clay of the Mont Terri Underground Rock Laboratory (URL). Diffusion coefficients DL and accessible porosity for HTO, 36Cl- and 125I- were also measured on centimetric Opalinus clay samples using the through diffusion technique. The evolution of tritium and iodide concentration in the injection system over time and in situ profiles were interpreted with a 3-D numerical simulation. A detailed analysis of the results pointed out the effect of a disturbed zone around the borehole with higher diffusion coefficients. The best estimate values for HTO and iodide in the undisturbed rock are DL = 5×10-11m2/s and DL = 1.5×10-11m2/s respectively. For the laboratory tests, DL values for HTO are in the range of 5×10-11m2/s to 8.5×10-11m2/s. For 125I- and 36Cl- the measured values are DL=νmber1.4×10-11 and DL=1.6×10-11m2/s respectively. All HTO results obtained with a through diffusion technique are within the same range as those obtained in the in situ tests. The DL values obtained in diffusion cells with 125I- and 36Cl- and the value drawn from the interpretation of stable 127I- concentration profiles from the in situ tests are very close. In fact, some significant uncertainties could be identified (i.e. a likely chemical retention of iodide on argillites, effect of the disturbed zone). | |
| 540 | |a © 2004 Oldenbourg Wissenschaftsverlag GmbH | ||
| 690 | 7 | |a Laboratory techniques, experiments |2 nationallicence | |
| 690 | 7 | |a Analytical chemistry |2 nationallicence | |
| 690 | 7 | |a Inorganic chemistry |2 nationallicence | |
| 700 | 1 | |a Tevissen |D Etienne |4 aut | |
| 700 | 1 | |a Soler |D J. M. |4 aut | |
| 700 | 1 | |a Montarnal |D P. |4 aut | |
| 700 | 1 | |a Gautschi |D A. |4 aut | |
| 700 | 1 | |a Van Loon |D Luc R. |4 aut | |
| 773 | 0 | |t Radiochimica Acta/International journal for chemical aspects of nuclear science and technology |d Oldenbourg Wissenschaftsverlag GmbH |g 92/9-11/2004(2004-11-01), 781-786 |x 0033-8230 |q 92:9-11/2004<781 |1 2004 |2 92 |o ract | |
| 856 | 4 | 0 | |u https://doi.org/10.1524/ract.92.9.781.54989 |q text/html |z Onlinezugriff via DOI |
| 908 | |D 1 |a research article |2 jats | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1524/ract.92.9.781.54989 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Tevissen |D Etienne |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Soler |D J. M. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Montarnal |D P. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Gautschi |D A. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Van Loon |D Luc R. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Radiochimica Acta/International journal for chemical aspects of nuclear science and technology |d Oldenbourg Wissenschaftsverlag GmbH |g 92/9-11/2004(2004-11-01), 781-786 |x 0033-8230 |q 92:9-11/2004<781 |1 2004 |2 92 |o ract | ||
| 900 | 7 | |b CC0 |u http://creativecommons.org/publicdomain/zero/1.0 |2 nationallicence | |
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| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-gruyter | ||