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<p>Nuclide migration parameters are crucial for conducting safety assessments and advancing site selection for disposal of high-level radioactive waste (HLW). To quickly and accurately determine diffusion properties of nuclides in Tamusu mudstone, the updated electromigration setup and advection–dispersion model have been used to test and interpret effective diffusion coefficients (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({D}_{m}^{e}\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>D</mi> <mrow> <mi>m</mi> </mrow> <mi>e</mi> </msubsup> </math></EquationSource> </InlineEquation>) of Sr(II). Results show that the <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\({D}_{m}^{e}\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>D</mi> <mrow> <mi>m</mi> </mrow> <mi>e</mi> </msubsup> </math></EquationSource> </InlineEquation> of Sr(II) are determined as 3.9 × 10<sup>−13</sup>m<sup>2</sup>/s-2.6 × 10<sup>−12</sup>m<sup>2</sup>/s, confirming the almost non-adsorptive of Sr(II) on Tamusu mudstone. Contents and features of analcime and carbonate in Tamusu mudstone may make contributions to the <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\({D}_{m}^{e}\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>D</mi> <mrow> <mi>m</mi> </mrow> <mi>e</mi> </msubsup> </math></EquationSource> </InlineEquation> values. The updated setup and advection–dispersion model could be suitable for quickly and accurately obtaining nuclide migration parameters. This work would give insights to safety assessment for argillaceous-based site selection in China.</p>

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Rapid determination of strontium diffusion parameters in Tamusu mudstone by updated electromigration

  • 期刊论文

  • 发表日期：

    2026年4月2日

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  • Long Xiang,
  • Xiaodong Liu,
  • Zheng Rao,
  • Pinghui Liu

摘要

Nuclide migration parameters are crucial for conducting safety assessments and advancing site selection for disposal of high-level radioactive waste (HLW). To quickly and accurately determine diffusion properties of nuclides in Tamusu mudstone, the updated electromigration setup and advection–dispersion model have been used to test and interpret effective diffusion coefficients ( \({D}_{m}^{e}\) D m e ) of Sr(II). Results show that the \({D}_{m}^{e}\) D m e of Sr(II) are determined as 3.9 × 10−13m2/s-2.6 × 10−12m2/s, confirming the almost non-adsorptive of Sr(II) on Tamusu mudstone. Contents and features of analcime and carbonate in Tamusu mudstone may make contributions to the \({D}_{m}^{e}\) D m e values. The updated setup and advection–dispersion model could be suitable for quickly and accurately obtaining nuclide migration parameters. This work would give insights to safety assessment for argillaceous-based site selection in China.