Fabrication of nuclear fuel pellets

Details Fabrication of nuclear fuel pellets Fabrication of nuclear fuel pellets

G - Physics

21

C

31/88

G21C 3/62 (2006.01) C04B 35/51 (2006.01)

Patent

CA 1254378

ABSTRACT Title: Fabrication of Nuclear Fuel Pellets Uranium dioxide powder produced by a gas phase process in which uranium hexafluoride is reacted with dry steam and then with steam and/or hydrogen at a higher temperature is subjected to mechanical treatment, e.g. milling, to break down its structure and increase its packing density. Other powders may be included with the uranium dioxide. The treated powder is mixed with a limited quantity (e.g. 0.5% by weight) of binder, preferably a high strength adhesive, to produce a free flowing powder and formed into pellets by pressing. The pellets are then sintered. Optionally the free flowing powder is spheroidised by tumbling prior to pressing into pellets.

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