Modelling of a moving bed furnace for the production of uranium tetrafluoride. Part 2: Application of the model
| Autor: | Fabrice Patisson, B. Dussoubs, J.-L. Houzelot, D. Ablitzer, J. Jourde |
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| Rok vydání: | 2003 |
| Předmět: |
Computer simulation
Nuclear fuel Applied Mathematics General Chemical Engineering Nuclear engineering Thermodynamics General Chemistry Uranium tetrafluoride Industrial and Manufacturing Engineering Reaction rate chemistry.chemical_compound chemistry Uranium trioxide Mass transfer Moving bed Reduction (mathematics) |
| Zdroj: | Chemical Engineering Science. 58:2629-2642 |
| ISSN: | 0009-2509 |
| DOI: | 10.1016/s0009-2509(03)00121-0 |
| Popis: | The French nuclear fuel making route uses, prior to enrichment, uranium tetrafluoride UF 4 obtained from the reduction, followed by hydrofluorination of uranium trioxide UO 3 . These two steps are carried out in a specific reactor known as a moving bed furnace. We developed a steady-state numerical model of the moving bed furnace, described in Part 1. In the Part 2, calculation results for a reference set of operating parameters of the furnace are presented in term of temperature, reaction rates, solid and gas compositions. Results analysis enlightens the detail of the furnace behaviour in its different zones. Unknown features have been revealed, such as thermodynamic limitation of the hydrofluorination reaction in the hot core of the moving bed. A sensibility study of various operating parameters shows how some can influence the UF 4 quality and underlines the strong coupling between the different zones of the furnace. Finally, the model is applied to define an optimal temperature progression in the furnace and suggests geometrical modifications. Besides, the validity of using the law of additive reaction times for calculating the reaction rates in such a reactor model has been checked for the first time against a numerical grain model. |
| Databáze: | OpenAIRE |
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