Predictive and Inverse Modeling of a Radionuclide Diffusion Experiment in Crystalline Rock at ONKALO (Finland)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46356088%3A_____%2F23%3AN0000017" target="_blank" >RIV/46356088:_____/23:N0000017 - isvavai.cz</a>
Alternative codes found
RIV/46747885:24220/23:00012259 RIV/46747885:24620/23:00012259
Result on the web
<a href="https://www.tandfonline.com/doi/full/10.1080/00295450.2023.2209234" target="_blank" >https://www.tandfonline.com/doi/full/10.1080/00295450.2023.2209234</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1080/00295450.2023.2209234" target="_blank" >10.1080/00295450.2023.2209234</a>
Alternative languages
Result language
angličtina
Original language name
Predictive and Inverse Modeling of a Radionuclide Diffusion Experiment in Crystalline Rock at ONKALO (Finland)
Original language description
The REPRO-TDE test was performed at a depth of about 400 m in the ONKALO underground research facility in Finland. Synthetic groundwater containing radionuclide tracers [tritiated water tracer (HTO), Cl-36, Na-22, Ba-133, and Cs-134] was circulated for about 4 years in a packed-off interval of the injection borehole. Tracer activities were additionally monitored in two observation boreholes. The test was the subject of a modeling exercise by the SKB GroundWater Flow and Transport of Solutes Task Force. Eleven teams participated in the exercise, using different model concepts and approaches. Predictive model calculations were based on laboratory-based information concerning porosities, diffusion coefficients, and sorption partition coefficients. After the experimental results were made available, the teams were able to revise their models to reproduce the observations.General conclusions from these back-analysis calculations include the need for reduced effective diffusion coefficients for Cl-36 compared to those applicable to HTO (anion exclusion), the need to implement weaker sorption for Na-22 compared to results from laboratory batch sorption experiments, and the observation of large differences between the theoretical initial concentrations for the strongly sorbing Ba-133 and Cs-134, and the first measured values a few hours after tracer injection.Different teams applied different concepts, concerning mainly the implementation of isotropic versus anisotropic diffusion, or the possible existence of borehole disturbed zones around the different boreholes. The role of microstructure was also addressed in two of the models.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20305 - Nuclear related engineering; (nuclear physics to be 1.3);
Result continuities
Project
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Continuities
V - Vyzkumna aktivita podporovana z jinych verejnych zdroju
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nuclear Technology
ISSN
0029-5450
e-ISSN
1943-7471
Volume of the periodical
209
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
1765-1784
UT code for WoS article
001004445200001
EID of the result in the Scopus database
2-s2.0-85163083960