Experimental and numerical investigations of 99TcO4        − diffusion in compacted SPV 200 bentonite

Yu Hung Shih; I. Hsien Lee; Chuen Fa Ni; Tsuey Lin Tsai; Liang Cheng Chen; Chuan Pin Lee; Shih Chin Tsai; Te Yen Su

doi:10.1007/s10967-018-5800-x

Experimental and numerical investigations of ⁹⁹TcO₄ ⁻ diffusion in compacted SPV 200 bentonite

Yu Hung Shih, I. Hsien Lee, Chuen Fa Ni, Tsuey Lin Tsai, Liang Cheng Chen, Chuan Pin Lee, Shih Chin Tsai, Te Yen Su

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Diffusion characteristics in bentonite are essential to quantify the transport of radionuclides through buffer/backfill materials in waste repositories. This study employs through-diffusion techniques to investigate the diffusion behavior of ⁹⁹TcO₄ ⁻ through SPV bentonite with various densities. The apparent diffusion coefficients for bentonite densities are estimated using Marquardt–Levenberg optimization algorithm in the HYDRUS-1D model. Based on the experimental and calculation results, ⁹⁹Tc could be considered as non-sorbing radionuclides. The data obtained in this study provide a valuable reference for the safety assessment of waste repositories.

Original language	English
Pages (from-to)	1081-1089
Number of pages	9
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume	316
Issue number	3
DOIs	https://doi.org/10.1007/s10967-018-5800-x
State	Published - 1 Jun 2018

Keywords

Apparent diffusion coefficient (D)
Distribution coefficient (K)
SPV bentonite
Through diffusion

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10.1007/s10967-018-5800-x

Cite this

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title = "Experimental and numerical investigations of 99TcO4 − diffusion in compacted SPV 200 bentonite",

abstract = "Diffusion characteristics in bentonite are essential to quantify the transport of radionuclides through buffer/backfill materials in waste repositories. This study employs through-diffusion techniques to investigate the diffusion behavior of 99TcO4 − through SPV bentonite with various densities. The apparent diffusion coefficients for bentonite densities are estimated using Marquardt–Levenberg optimization algorithm in the HYDRUS-1D model. Based on the experimental and calculation results, 99Tc could be considered as non-sorbing radionuclides. The data obtained in this study provide a valuable reference for the safety assessment of waste repositories.",

keywords = "Apparent diffusion coefficient (D), Distribution coefficient (K), SPV bentonite, Through diffusion",

author = "Shih, {Yu Hung} and Lee, {I. Hsien} and Ni, {Chuen Fa} and Tsai, {Tsuey Lin} and Chen, {Liang Cheng} and Lee, {Chuan Pin} and Tsai, {Shih Chin} and Su, {Te Yen}",

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T1 - Experimental and numerical investigations of 99TcO4 − diffusion in compacted SPV 200 bentonite

AU - Shih, Yu Hung

AU - Lee, I. Hsien

AU - Ni, Chuen Fa

AU - Tsai, Tsuey Lin

AU - Chen, Liang Cheng

AU - Lee, Chuan Pin

AU - Tsai, Shih Chin

AU - Su, Te Yen

PY - 2018/6/1

Y1 - 2018/6/1

N2 - Diffusion characteristics in bentonite are essential to quantify the transport of radionuclides through buffer/backfill materials in waste repositories. This study employs through-diffusion techniques to investigate the diffusion behavior of 99TcO4 − through SPV bentonite with various densities. The apparent diffusion coefficients for bentonite densities are estimated using Marquardt–Levenberg optimization algorithm in the HYDRUS-1D model. Based on the experimental and calculation results, 99Tc could be considered as non-sorbing radionuclides. The data obtained in this study provide a valuable reference for the safety assessment of waste repositories.

AB - Diffusion characteristics in bentonite are essential to quantify the transport of radionuclides through buffer/backfill materials in waste repositories. This study employs through-diffusion techniques to investigate the diffusion behavior of 99TcO4 − through SPV bentonite with various densities. The apparent diffusion coefficients for bentonite densities are estimated using Marquardt–Levenberg optimization algorithm in the HYDRUS-1D model. Based on the experimental and calculation results, 99Tc could be considered as non-sorbing radionuclides. The data obtained in this study provide a valuable reference for the safety assessment of waste repositories.

KW - Apparent diffusion coefficient (D)

KW - Distribution coefficient (K)

KW - SPV bentonite

KW - Through diffusion

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U2 - 10.1007/s10967-018-5800-x

DO - 10.1007/s10967-018-5800-x

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