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Title: Diffusion of Radionuclides in Concrete and Soil

Abstract

One of the methods being considered for safely disposing of Category 3 low-level radioactive wastes is to encase the waste in concrete. Such concrete encasement would contain and isolate the waste packages from the hydrologic environment and would act as an intrusion barrier. Any failure of concrete encasement may result in water intrusion and consequent mobilization of radionuclides from the waste packages. The mobilized radionuclides may escape from the encased concrete by mass flow and/or diffusion and move into the surrounding subsurface environment. Therefore, it is necessary to assess the performance of the concrete encasement structure and the ability of the surrounding soil to retard radionuclide migration. The objective of our study was to measure the diffusivity of Re, Tc and I in concrete containment and the surrounding vadose zone soil. Effects of carbonation, presence of metallic iron, and fracturing of concrete and the varying moisture contents in soil on the diffusivities of Tc and I were evaluated.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1081418
Report Number(s):
PNNL-SA-82762
830403000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Book
Resource Relation:
Related Information: Radioactive Waste, 331-350
Country of Publication:
United States
Language:
English

Citation Formats

Mattigod, Shas V., Wellman, Dawn M., Bovaird, Chase C., Parker, Kent E., Recknagle, Kurtis P., Clayton, Libby N., and Wood, Marcus I. Diffusion of Radionuclides in Concrete and Soil. United States: N. p., 2012. Web.
Mattigod, Shas V., Wellman, Dawn M., Bovaird, Chase C., Parker, Kent E., Recknagle, Kurtis P., Clayton, Libby N., & Wood, Marcus I. Diffusion of Radionuclides in Concrete and Soil. United States.
Mattigod, Shas V., Wellman, Dawn M., Bovaird, Chase C., Parker, Kent E., Recknagle, Kurtis P., Clayton, Libby N., and Wood, Marcus I. Wed . "Diffusion of Radionuclides in Concrete and Soil". United States.
@article{osti_1081418,
title = {Diffusion of Radionuclides in Concrete and Soil},
author = {Mattigod, Shas V. and Wellman, Dawn M. and Bovaird, Chase C. and Parker, Kent E. and Recknagle, Kurtis P. and Clayton, Libby N. and Wood, Marcus I.},
abstractNote = {One of the methods being considered for safely disposing of Category 3 low-level radioactive wastes is to encase the waste in concrete. Such concrete encasement would contain and isolate the waste packages from the hydrologic environment and would act as an intrusion barrier. Any failure of concrete encasement may result in water intrusion and consequent mobilization of radionuclides from the waste packages. The mobilized radionuclides may escape from the encased concrete by mass flow and/or diffusion and move into the surrounding subsurface environment. Therefore, it is necessary to assess the performance of the concrete encasement structure and the ability of the surrounding soil to retard radionuclide migration. The objective of our study was to measure the diffusivity of Re, Tc and I in concrete containment and the surrounding vadose zone soil. Effects of carbonation, presence of metallic iron, and fracturing of concrete and the varying moisture contents in soil on the diffusivities of Tc and I were evaluated.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Apr 25 00:00:00 EDT 2012},
month = {Wed Apr 25 00:00:00 EDT 2012}
}

Book:
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