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Title: Effects of different parameters on the densities of uranium dioxide and uranium dioxide-gadolinium oxide fuels produced by the sol-gel technique

Effects of different parameters on the densities of uranium dioxide and uranium dioxide-gadolinium oxide fuels produced by the sol-gel technique Uranium dioxide-gadolinium oxide fuel was produced by the sol-gel technique. The effects of different parameters such as calcination and reduction temperature, compaction pressure, particle size of powder, type of binder, sintering temperature, sintering atmosphere, and duration of sintering on pore size distribution were investigated. The experiments were carried out on three different fuels, (a) pure urania, (b) urania-gadolinia (10%), and (c) urania-gadolinia (10%)-titania (0.1%) doped fuel. It was observed that compaction pressure as low as 200 MPa is sufficient to obtain high-density pellets, while the use of binder or grinding the powder below 400 mesh does not affect densities. Reduction of powder at 1,000 K always gives lower density fuels than the powder reduced at 873 K. Sintering at high temperature and the use of a wet atmosphere each independently increases the fuel density.
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Publication Date:
OSTI Identifier:OSTI ID: 89650
Resource Type:Journal Article
Resource Relation:Journal Name: Nuclear Technology; Journal Volume: 111; Journal Issue: 1; Other Information: PBD: Jul 1995
Country of Publication:United States
Language:English
Subject: 05 NUCLEAR FUELS; 36 MATERIALS SCIENCE; URANIUM DIOXIDE; SOL-GEL PROCESS; DENSITY; GADOLINIUM OXIDES; MIXED OXIDE FUELS; COMPACTING; PORE STRUCTURE; TITANIUM OXIDES; DOPED MATERIALS; NUCLEAR FUELS