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May 28, 2026Radiochemistry0 citations

Britholite Matrices with Actinide Surrogates, Prepared by Cold Crucible Induction Melting

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SYS. V. YudintsevMKM. Yu. KalenovaIMI. M. Melnikova

Key Points

  • The study aims to create and analyze britholite matrices for the containment of nuclear waste containing actinides and rare earth elements.
  • Samples based on Ca–REE silicate were produced using cold crucible induction melting.
  • The stabilization of britholite in aqueous solutions was assessed through Nd distribution analysis.
  • Leach rates of Nd in glass-ceramics were measured under controlled thermal conditions.
  • Britholite matrices exhibited a 6–13 times higher bias for Nd distribution compared to other phases.
  • Normalized Nd leach rates in water and brine were observed to be between 10–7 and 10–9 g/(cm2 day) at 200–250°C.
  • The britholite phase demonstrated stability against leaching, indicating its potential for nuclear waste applications.

Abstract

Samples based on Ca–REE silicate with an apatite–britholite structure were produced using cold crucible induction melting. These samples serve as candidate matrices for the REE–actinide fraction of nuclear fuel reprocessing waste. Britholite has a simple composition and high capacity for REEs and actinides; the phase is stable in aqueous solutions. The distribution of Nd (surrogate of REE–actinide fraction) in glass-ceramics is biased toward britholite with a factor of 6–13. The normalized Nd leach rates with water and brine at 200–250°C are 10–7–10–9 g/(cm2 day).

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Yudintsev et al. (2026) studied this question.

synapsesocial.com/papers/6a17dd4e3fad632b0f9da17chttps://doi.org/10.1134/s1066362226020074
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