Process for producing an aggregate suitable for inclusion into a

Details Process for producing an aggregate suitable for inclusion into a Process for producing an aggregate suitable for inclusion into a

1998-02-27

2000-09-19

Tucker, Philip

Compositions

X-ray or neutron shield

423 3, 423 19, A62D 3100, C01G 5600

Patent

active

061207063

ABSTRACT:
The present invention is directed to methods for converting depleted uranium hexafluoride to a stable depleted uranium silicide in a one-step reaction. Uranium silicide provides a stable aggregate material that can be added to concrete to increase the density of the concrete and, consequently, shield gamma radiation. As used herein, the term "uranium silicide" is defined as a compound generically having the formula U.sub.x Si.sub.y, wherein the x represents the molecules of uranium and the y represent the molecules of silicon. In accordance with the present invention, uranium hexafluoride is converted to a uranium silicide by contacting the uranium hexafluoride with a silicon-containing material at a temperature in a range between about 1450.degree. C. and about 1750.degree. C. The stable depleted uranium silicide is included as an aggregate in a radiation shielding product, such as a concrete product.

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