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Uranium carbide dissolution in nitric solution: Sonication vs. silent conditions

Matthieu Virota, Stéphanie Szenknect

2013enuranium carbidedissolutionsonicationnitric acidnuclear fuel

Abstract

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The dissolution of uranium carbide (UC) in nitric acid media is studied under two different conditions: power ultrasound sonication and magnetic stirring. The objective is to evaluate the efficiency of UC dissolution by comparing these methods. The methodology involves observing the induction period required for UC dissolution in a 3 M nitric acid solution. Results show that sonication significantly shortens this induction period at low acidity, while at higher acidity, magnetic stirring facilitates faster dissolution kinetics. Despite the advantages of sonication, it leads to passivation after approximately 60% dissolution, which remains incomplete across varying acidity levels. This is corroborated by analyses using ICP–AES, LECO, and SEM–EDX. The kinetics of UC dissolution is correlated to in situ nitrous acid generation, which occurs more rapidly under ultrasound in low-acidity conditions due to nitric acid sonolysis. Additionally, the carbon balance is influenced by the chosen dissolution method and nitric acid concentration. These findings highlight the complexities in the dissolution process, underscoring the need for effective UC reprocessing strategies in nuclear fuel development.

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Cite This Work

@article{1f05e352-85a0-4627-84b7-0f2a7513646d,
  title={Uranium carbide dissolution in nitric solution: Sonication vs. silent conditions},
  author={Matthieu Virota and Stéphanie Szenknect},
  year={2013},
  language={en}
}
TY  - JOUR
TI  - Uranium carbide dissolution in nitric solution: Sonication vs. silent conditions
AU  - Matthieu Virota
AU  - Stéphanie Szenknect
PY  - 2013
LA  - en
ER  -

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