Abstract
The optimisation of high density metallic U–Mo/Al(Si) nuclear fuels, developed for use in high neutron flux research reactor without proliferation issues, requires an excellent control of the manufacturing conditions for getting a full benefit of Si powder additions. Eleven full size plates (from the IRIS and E-FUTURE experimental programs) have been analysed by diffraction using synchrotron high energy X-rays. For the first time, both the levels of the γU–Mo phase destabilisation in the U–Mo particle and characteristics (size and composition) of the Si rich protective layers around these particles have been quantified at a macroscopic scale. These results enable to evaluate the influence of the different parameters implied in the manufacturing process and could also provide solutions for producing enhanced fuels.
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