Kinetics of and atmospheric effects on gallium removal from a CeO{sub 2} based mixed oxide surrogate
This paper describes preliminary experimental results on the kinetics of Ga removal from Ga{sub 2}O{sub 3}-doped CeO{sub 2{minus}x}, a surrogate for weapons grade PuO{sub 2{minus}x}. Ga is removed from the surrogate feedstock material using thermal techniques. An Ar-6% H{sub 2} gas was used in order to reduce the oxide to gaseous Ga{sub 2}O. Experiments were done in the temperature range of 600--1,200 C as a function of time, gas flow rate, and sample geometry. Samples were analyzed through measurements of weight change, scanning electron microscopy/energy dispersive spectroscopy, x-ray photoelectron spectroscopy, proton induced x-ray emission, and direct current plasma analysis. Gallium levels were reduced by as much as 98% (130 ppm Ga residue) of that in the starting material. Studies to date have shown CeO{sub 2{minus}x} is a very good surrogate for PuO{sub 2{minus}x}.
- Research Organization:
- Los Alamos National Lab., Materials Science and Technology Div., NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 307985
- Report Number(s):
- LA-UR-98-2735; CONF-980521-; ON: DE99001652; TRN: AHC29905%%163
- Resource Relation:
- Conference: 100. annual meeting of the American Ceramic Society, Cincinnati, OH (United States), 3-6 May 1998; Other Information: PBD: [1998]
- Country of Publication:
- United States
- Language:
- English
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