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Title: Process for producing an aggregate suitable for inclusion into a radiation shielding product

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 C. and about C. The stable depleted uranium silicide is included as an aggregate in a radiation shielding product, such as a concrete product.
 [1];  [1]
  1. (Idaho Falls, ID)
Issue Date:
OSTI Identifier:
Bechtel BWXT Idaho, LLC (Idaho Falls, ID) INEEL
Patent Number(s):
US 6120706
Contract Number:
Research Org:
Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID
Country of Publication:
United States
process; producing; aggregate; suitable; inclusion; radiation; shielding; product; directed; methods; converting; depleted; uranium; hexafluoride; stable; silicide; one-step; reaction; provides; material; added; concrete; increase; density; consequently; shield; gamma; term; defined; compound; generically; formula; represents; molecules; represent; silicon; accordance; converted; contacting; silicon-containing; temperature; range; 1450; degree; 1750; included; uranium silicide; aggregate material; radiation shielding; depleted uranium; radiation shield; gamma radiation; uranium hexafluoride; concrete product; containing material; step reaction; /252/423/