Airborne Release Fraction of Dissolved Materials During the Combustion of Liquids Representative of Nuclear Waste Treatment Process - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Nuclear Technology Année : 2023

Airborne Release Fraction of Dissolved Materials During the Combustion of Liquids Representative of Nuclear Waste Treatment Process

Résumé

Experimental results are reported on the airborne release, under fire conditions, of hazardous materials dissolved in mixture of organic solvents (tributylphosphate TBP and hydrogenated tetrapropylene HTP) representatives of the nuclear fuel recycling process. Cerium and ruthenium have been considered respectively as stable and volatile fission products and which could be eventually released as airborne particles during thermal degradation of contaminated and inflammable liquids. Airborne release fractions (ARF) and their experimental uncertainties have been determined. Considering fire involving contaminated organic solvents, higher ARF are reported for ruthenium Ru(+III) (0.99 +/-1.20 %) in comparison with cerium (0.22 +/-0.31 % and 0.20 +/-0.28 % for Ce(+III) and Ce(+IV), respectively). This discrepancy is partially due to the volatility of ruthenium formed under these conditions. Considering configurations involving an aqueous nitric acid phase placed below contaminated solvents, boiling of this phase enhances the release of contaminant materials, 1.78 +/-1.06 % and 1.01 +/-1.31 % for Ce(+III) and Ce(+IV), respectively and 12.41 +/-29.45 % for Ru(+III). Analysis of size distribution, morphology and chemical composition of released particles and droplets emitted during HTP/TBP bubble collapse are reported, highlighting the contribution of bubble bursting at the solvent surface to airborne release.
Fichier principal
Vignette du fichier
NT21-178_Proof.pdf (1.73 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03966723 , version 1 (31-01-2023)

Licence

Paternité - Pas d'utilisation commerciale

Identifiants

Citer

F.-X. Ouf, M. de Mendonca Andrade, H. Feuchter, S. Duval, C. Volkringer, et al.. Airborne Release Fraction of Dissolved Materials During the Combustion of Liquids Representative of Nuclear Waste Treatment Process. Nuclear Technology, 2023, 209 (2), pp.169-192. ⟨10.1080/00295450.2022.2129274⟩. ⟨hal-03966723⟩
28 Consultations
15 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More