High temperature mechanical properties of fluorite crystal structured materials (CeO2, ThO2, and UO2) and advanced accident tolerant fuels (U3Si2, UN, and UB2)

Frazer, David Michael; Maiorov, Boris Alfredo; Carvajal-Nunez, U.; Evans, Jordan; Dunwoody, John Tyler; Kardoulaki, Erofili; Saleh, Tarik A.; White, Joshua Taylor

doi:10.1016/j.jnucmat.2021.153035

High temperature mechanical properties of fluorite crystal structured materials (CeO₂, ThO₂, and UO₂) and advanced accident tolerant fuels (U₃Si₂, UN, and UB₂)

Journal Article · Wed May 05 00:00:00 EDT 2021 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2021.153035· OSTI ID:1783541

^[1]; ^[2]; Carvajal-Nunez, U. ^[2]; Evans, Jordan ^[1]; Dunwoody, John Tyler ^[2]; ^[2]; ^[2]; ^[2]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Idaho National Lab. (INL), Idaho Falls, ID (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The mechanical interaction between the fuel and cladding that occurs during operation of a nuclear reactor is important to understand as it can lead to cladding failures and release of radioactive material into the coolant. Additionally, in order to develop better models of the pellet-clad mechanical interactions, the mechanical properties of the fuel at relevant operating temperatures, like the elastic moduli, are needed for current and advanced accident tolerant fuels (ATFs). In this work, elevated temperature nanoindentation and resonant ultrasound spectroscopy were used to measure the moduli and hardness of several fluorite materials (CeO₂, ThO₂, UO₂) and several ATF candidates (ATF) (U₃Si₂, UN, UB₂). In addition, a comparison of the two techniques was performed in this study to independently validate the mechanical properties.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: 89233218CNA000001; SC0001089

OSTI ID:: 1783541

Alternate ID(s):: OSTI ID: 1842220
OSTI ID: 1785558

Report Number(s):: LA-UR--21-20899

Journal Information:: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Vol. 554; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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References (57)

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