Progress update on lower length scale research and development on U3Si2 fuel and FeCrAl cladding
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
This report summarizes the lower length scale model development and studies in regards to two accident tolerant (ATF) concepts, U3Si2 and FeCrAl. U3Si2 is proposed to replace UO2 fuel for its high thermal conductivity and higher uranium density. FeCrAl alloys are proposed to replace Zr based cladding for their high mechanical strength and good corrosion resistance. Before applying them in reactors, sufficient data are needed to establish their predictable in-pile performance, but largely missing, and they are costly and time consuming to obtain by experimental approaches. Under the NEAMS ATF high-impact-problem (HIP), multiscale modeling and simulations are used to develop atomistic and mesoscale tools, obtain fundamental material properties, and assess the behaviors of these two ATF concepts. The accomplishments in FY17 are briefly introduced in this report including the development of interatomic potentials, assessment of swelling in U3Si2, and Cr precipitation in FeCrAl alloys.
- Research Organization:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE)
- DOE Contract Number:
- AC07-05ID14517
- OSTI ID:
- 1472101
- Report Number(s):
- INL/EXT-17-43255-Rev000
- Country of Publication:
- United States
- Language:
- English
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