4. PWR fuel fabrication
4.1 Enriched UO2 powder
Uranium is generally made available to the manufacturer by the electricity customer; it arrives in the form of enriched hexafluoride (UF6), in cylindrical containers containing around 2.2 tonnes of UF6 .
To go from hexafluoride (solid up to around 60°C) to uranium oxide powder (UO2) two routes are possible, the chemical route and the so-called dry route, with several variants for each.
• ADU process (ammonium diuranate)
UF6 + 2H2O → UO2F2 + 4HF
2UO2F2 + 14NH4OH + 8HF → (NH4)2U2O7 + 12NH4F + 11H2O...
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PWR fuel fabrication
Manufacturing organization
References
- (1) - BAILLY (H.), MENESSIER (D.), PRUNIER (C.) - Le combustible nucléaire des réacteurs à eau sous pression et des réacteurs à neutrons rapides – conception et comportement. - Eyrolles (1996).
- (2) - Fission Gas Behaviour in Water Reactor Fuels. - OECD/NEA Seminar Proceedings, Cadarache, France, sept. 2000. ...
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