2014
DOI: 10.1016/j.jnucmat.2014.08.005
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In-pile test results of U-silicide or U-nitride coated U-7Mo particle dispersion fuel in Al

Abstract: U-silicide or U-nitride coated U-Mo particle dispersion fuel in Al (U-Mo/Al) was in-pile tested to examine the effectiveness of the coating as a diffusion barrier between the U-7Mo fuel kernels and Al matrix. This paper reports the PIE data and analyses focusing on the effectiveness of the coating in terms of interaction layer (IL) growth and general fuel performance. The U-silicide coating showed considerable success, but it also provided evidence for additional improvement for coating process. The U-nitride … Show more

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Cited by 16 publications
(5 citation statements)
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“…Recrystallization has been found to start at existing grain boundaries [3,4]. Hence increasing the grain size and reducing the grain boundary area by the thermal treatment of U-Mo alloy can effectively delay the recrystallization [5]. In addition to increasing the grain size, heating at high temperature is expected to anneal the defects introduced during powder production, further delaying the recrystallization.…”
Section: Introductionmentioning
confidence: 99%
“…Recrystallization has been found to start at existing grain boundaries [3,4]. Hence increasing the grain size and reducing the grain boundary area by the thermal treatment of U-Mo alloy can effectively delay the recrystallization [5]. In addition to increasing the grain size, heating at high temperature is expected to anneal the defects introduced during powder production, further delaying the recrystallization.…”
Section: Introductionmentioning
confidence: 99%
“…This behavior is attributed to a recrystallization mechanism of the fuel which induces both U(Mo) grain refinement and precipitation of large (micrometer sized) fission gas bubbles [2]. A way to delay this recrystallization and, thus, the associated swelling under irradiation, could consist in modifying the U(Mo) particle microstructure (which is an "as-solidified" microstructure, in powders produced by an atomization process), using homogenization thermal treatments, as pointed out in the frame of the KOMO-5 experiment [3].…”
Section: Introductionmentioning
confidence: 99%
“…Subsequently, the front of the recrystallized grain moves into the center of the grain and eventually consumes the entire grain. Increasing the grain size and reducing the grain boundary area in U-Mo fuels by heat treatment may lead to delayed recrystallization process and reduced fuel swelling [5,6].…”
Section: Introductionmentioning
confidence: 99%