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Radionuclide Transport in Fractured Rock : Numerical Assessment for High Level Waste Repository
Joint Authors
Rivero Oliva, Jose de Jesus
Alvim, Antonio Carlos Marques
Silveira, Claudia Siqueira da
Source
Science and Technology of Nuclear Installations
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-12-19
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
Deep and stable geological formations with low permeability have been considered for high level waste definitive repository.
A common problem is the modeling of radionuclide migration in a fractured medium.
Initially, we considered a system consisting of a rock matrix with a single planar fracture in water saturated porous rock.
Transport in the fracture is assumed to obey an advection-diffusion equation, while molecular diffusion is considered the dominant mechanism of transport in porous matrix.
The partial differential equations describing the movement of radionuclides were discretized by finite difference methods, namely, fully explicit, fully implicit, and Crank-Nicolson schemes.
The convective term was discretized by the following numerical schemes: backward differences, centered differences, and forward differences.
The model was validated using an analytical solution found in the literature.
Finally, we carried out a simulation with relevant spent fuel nuclide data with a system consisting of a horizontal fracture and a vertical fracture for assessing the performance of a hypothetical repository inserted into the host rock.
We have analysed the bentonite expanded performance at the beginning of fracture, the quantified radionuclide released from a borehole, and an estimated effective dose to an adult, obtained from ingestion of well water during one year.
American Psychological Association (APA)
Silveira, Claudia Siqueira da& Alvim, Antonio Carlos Marques& Rivero Oliva, Jose de Jesus. 2013. Radionuclide Transport in Fractured Rock : Numerical Assessment for High Level Waste Repository. Science and Technology of Nuclear Installations،Vol. 2013, no. 2013, pp.1-17.
https://search.emarefa.net/detail/BIM-501378
Modern Language Association (MLA)
Silveira, Claudia Siqueira da…[et al.]. Radionuclide Transport in Fractured Rock : Numerical Assessment for High Level Waste Repository. Science and Technology of Nuclear Installations No. 2013 (2013), pp.1-17.
https://search.emarefa.net/detail/BIM-501378
American Medical Association (AMA)
Silveira, Claudia Siqueira da& Alvim, Antonio Carlos Marques& Rivero Oliva, Jose de Jesus. Radionuclide Transport in Fractured Rock : Numerical Assessment for High Level Waste Repository. Science and Technology of Nuclear Installations. 2013. Vol. 2013, no. 2013, pp.1-17.
https://search.emarefa.net/detail/BIM-501378
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-501378