Heat Transfer in Nuclear Waste Glasses: Measurements and Modeling of Thermal Radiation Properties

Ferkl, Pavel; Marcial, José; Rigby, Jessica C.; George, Jaime L.; Anand, Khyati; Pezl, Radek; Kloužek, Jaroslav; Scrimshire, Alex; Prokhorenko, Oleg A.; Hrma, Pavel; Kruger, Albert A.; Pokorný, Richard

Heat Transfer in Nuclear Waste Glasses: Measurements and Modeling of Thermal Radiation Properties

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FERKL, Pavel, MARCIAL, José, RIGBY, Jessica C., GEORGE, Jaime L., ANAND, Khyati, PEZL, Radek, KLOUŽEK, Jaroslav, SCRIMSHIRE, Alex, PROKHORENKO, Oleg A., HRMA, Pavel, KRUGER, Albert A. and POKORNÝ, Richard (2026). Heat Transfer in Nuclear Waste Glasses: Measurements and Modeling of Thermal Radiation Properties. Journal of the American Ceramic Society, 109 (3): e70647. [Article]

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Abstract

We measured and modeled near‐infrared extinction of nuclear waste glasses from 300°C to 1150°C to enable predictive radiation heat transfer and thermal conductivity estimates. A composition‐ and redox‐informed model resolved contributions from key chromophores (Fe+2‐O‐Fe+3, V+4, free and bonded ≡Si‐OH groups) and, when present, spinel particles that can cause strong scattering. The model reproduced measured absorption from room temperature up to 1150°C, with minor discrepancies near 1 µm (likely due to possible trace impurities) and 2.5 µm (linked to uncertainty in hydroxy groups). Spectra showed silicate melts were semitransparent mainly in the 0.5–4.0 µm window, responsible for radiation thermal conductivity that generally increases with increasing temperature. We quantified the dependence of effective thermal conductivity on dissolved water and provided distributions across >100 LAW/HLW/DFHLW melts at 1150°C, supporting improved melter heat transfer modeling.

More Information

Official URL:

https://ceramics.onlinelibrary.wiley.com/doi/10.11...

Open Access URL:

https://ceramics.onlinelibrary.wiley.com/doi/epdf/...

Open Access Version:

Published version

Additional Information:

** Article version: VoR ** From Wiley via Jisc Publications Router ** History: received 10-10-2025; rev-recd 22-01-2026; ppub 01-03-2026; accepted 04-03-2026; epub 13-03-2026. ** Licence for VoR version of this article: http://creativecommons.org/licenses/by-nc/4.0/

Uncontrolled Keywords:

nuclear waste, scattering, radiation thermal conductivity, heat transfer by radiation, boron‐silicate glass

Identifiers

Identification Number:

10.1111/jace.70647

ORCID for Alex Scrimshire: