Beyond-design-basis regimes of uranium stripping and of carbonate regeneration of the solvent View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2017-11

AUTHORS

E. A. Puzikov, N. D. Goletskii, B. Ya. Zilberman, A. S. Kudinov, A. A. Naumov, D. N. Kukharev, M. S. Agafonova-Moroz, D. V. Ryabkov, O. V. Shmidt

ABSTRACT

Beyond-design-basis regimes of centrifugal contactors for U stripping and of mixer–settlers for carbonate regeneration of the solvent, 30% TBP in Isopar M, were studied from the viewpoint of the influence of incomplete uranium stripping on the phase stability of the extraction system in the step of the carbonate scrubbing of the solvent. Dynamic relationship between these two operations was determined. A mathematical model of uranium stripping at stepwise–20% deviation from the nominal value was developed and verified; it was shown that the beyond-design-basis regime develops in such apparatuses within 4 h at the total trial time longer than 8 h. The mathematical relationships obtained were used in the development of software for calculating transient processes that occur when the stream parameters in the course of carbonate regeneration of the solvent change. The beyond-design-basis regime of the solvent regeneration was found to have two regions: region of stoichiometric excess of carbonate ions over uranyl ions with the risk of precipitation and region of excess of uranyl ions over carbonate ions with acidification of the unit and uranium breakthrough with the recycled solvent. The conditions of the tests performed correspond to the second region. More... »

PAGES

587-595

Journal

TITLE

Radiochemistry

ISSUE

6

VOLUME

59

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1066362217060066

DOI

http://dx.doi.org/10.1134/s1066362217060066

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1099694943


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