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<p>An analysis of sintered uranium dioxide has been conducted using a hyperspectral camera sensitive to short-wave infrared wavelengths in the range 949–2472&#xa0;nm. Three groups of sintered UO<sub>2</sub> nuclear fuel pellets were prepared and analysed, with stable sub-group surrogates introduced at the preparation stage to emulate the presence of fission product elements. Results show a clear, consistent, and reproducible spectral response across the pellet groups for pure UO<sub>2</sub>. Furthermore, the addition of fission product elements is observed to affect the shortwave infrared response, causing an overall flattening of the spectra. We have shown that this spectral change is correlated significantly with the presence of lanthanides in the fuel matrix. This result could have important potential in post-irradiation examination for quantifying nuclear fuel burn-up and radiotoxicity at discharge, as the hyperspectral imaging setup allows multiple (&gt; 20) samples to be analysed in a single image, captured in under 30&#xa0;s.</p>

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Hyperspectral imaging suggests potential for rapid quantification of fission products in spent nuclear fuel

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年2月13日

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  • R. David Dunphy,
  • Andrew J. Parker,
  • Manuel Bandala,
  • Stuart Bennet,
  • Colin Boxall,
  • Patrick Chard,
  • Neil Cockbain,
  • David Eaves,
  • Dave Goddard,
  • Xiandong Ma,
  • C. James Taylor,
  • Richard Wilbraham,
  • Jaime Zabalza,
  • Paul Murray,
  • Malcolm J. Joyce

摘要

An analysis of sintered uranium dioxide has been conducted using a hyperspectral camera sensitive to short-wave infrared wavelengths in the range 949–2472 nm. Three groups of sintered UO2 nuclear fuel pellets were prepared and analysed, with stable sub-group surrogates introduced at the preparation stage to emulate the presence of fission product elements. Results show a clear, consistent, and reproducible spectral response across the pellet groups for pure UO2. Furthermore, the addition of fission product elements is observed to affect the shortwave infrared response, causing an overall flattening of the spectra. We have shown that this spectral change is correlated significantly with the presence of lanthanides in the fuel matrix. This result could have important potential in post-irradiation examination for quantifying nuclear fuel burn-up and radiotoxicity at discharge, as the hyperspectral imaging setup allows multiple (> 20) samples to be analysed in a single image, captured in under 30 s.