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- W32090727 abstract "The majority of research and test reactors around the world employ aluminum fuel element designs that contain dispersed powders of uranium compounds as fuel. Specifically, two compounds are used: (1) uranium oxide (U/sub 3/O/sub 8/) and (2) an uranium aluminide mixed phase composed of the intermetallic compounds UAl/sub 2/, UAl/sub 3/, and UAl/sub 4/, all made with highly enriched uranium (HEU), i.e., 93% /sup 235/U. The reduction of /sup 235/U enrichment to below 20%, to so-called low enriched uranium (LEU), requires the use of higher density fuels for those applications where increased fuel loading is not feasible. Fuel dispersant loading is, in practice, limited to approximately 45 vol %. Fuel development in the Reduced Envichment Research and Test Reactors (RERTR) program has focused on uranium silicides (U/sub 3/Si and U/sub 3/Si/sub 2/) as the most promising high-density fuels. The compounds of U/sub 6/Fe and U/sub 6/Mn as well as U/sub 3/Si containing Cu were tested as part of the search for stable very-high-density fuels. The problem of breakaway swelling in high-density fuel compounds is attributed to radiation-induced amorphization of these compounds. Alloy additions are a possible means by which the crystal structure of very-high-density compounds can be strengthened and preservedmore » to high irradiation doses. Tailoring metallurgical treatment during fabrication, to avoid thermodynamically weak compounds, appears promising for certain compound combinations. 5 refs., 2 figs« less" @default.
- W32090727 created "2016-06-24" @default.
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- W32090727 date "1987-10-01" @default.
- W32090727 modified "2023-09-27" @default.
- W32090727 title "Prospects of stable high-density dispersion fuels" @default.
- W32090727 hasPublicationYear "1987" @default.
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