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

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1 Citation (Scopus)

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 languageEnglish
Pages (from-to)1081-1089
Number of pages9
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume316
Issue number3
DOIs
Publication statusPublished - 2018 Jun 1

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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