A STUDY OF THE ATTACK OF URANIUM OXIDES AND ALLOYS IN GAS PHASE. ITS APPLICATION TO THE CASE OF IRRADIATED NUCLEAR FUEL ELEMENTS (in French)
This study concerns uranium recovery as hexafluoride from nuclear fuels, in particular from sintered U--Mo and UO/sub 2/ alloys. The attack of U--Mo is carried out in two stages: the first one is the conversion, either into an oxide through the action of HCl-O/sub 2/ mixtures at temperatures above 300 deg C, or into oxifluorides through the action of HF--O/sub 2/ mixtures at temperatures higher than 220 deg C; then these intermediate compounds are attacked by fluorine. Sintered UO/sub 2/ is directiy attacked by fluorine. The process has the advantage of operating in gas phase, with appreciable reaction rates and negligible uranium losses. Another advartage, the majority of the molybdenum is removed from U-Mo alloys. (auth)
- Research Organization:
- Commissariat a l'Energie Atomique, Paris
- NSA Number:
- NSA-17-018198
- OSTI ID:
- 4713055
- Journal Information:
- Energie Nucl., Journal Name: Energie Nucl. Vol. Vol: 5
- Country of Publication:
- Country unknown/Code not available
- Language:
- French
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