U3Si2 behavior in H2O: Part I, flowing steam and the effect of hydrogen

E. Sooby Wood; J. T. White; C. J. Grote; A. T. Nelson

doi:10.1016/j.jnucmat.2018.01.002

U₃Si₂ behavior in H₂O: Part I, flowing steam and the effect of hydrogen

E. Sooby Wood, J. T. White, C. J. Grote, A. T. Nelson

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70 Scopus citations

Abstract

Recent interest in U₃Si₂ as an advanced light water reactor fuel has driven assessment of numerous properties, but characterization of its response to H₂O environments is absent from the literature. The behavior of U₃Si₂ in H₂O containing atmospheres is investigated and presented in a two-part series of articles aimed to understand the degradation mechanism of U₃Si₂ in H₂O. Reported here are thermogravimetric data for U₃Si₂ exposed to flowing steam at 250–470 °C. Additionally the response of U₃Si₂ to flowing Ar-6% H₂ from 350 to 400 °C is presented. Microstructural degradation is observed following hours of exposure at 350 °C in steam. U₃Si₂ undergoes pulverization on the timescale of minutes when temperatures are increased above 400 °C. This mechanism is accelerated in flowing Ar-H₂ at the same temperatures.

Original language	English
Pages (from-to)	404-412
Number of pages	9
Journal	Journal of Nuclear Materials
Volume	501
DOIs	https://doi.org/10.1016/j.jnucmat.2018.01.002
State	Published - Apr 1 2018
Externally published	Yes

Funding

This work was conducted at Los Alamos National Laboratory under the National Nuclear Security Administration contract DE-AC52-06NA25396 and supported by the U.S. Department of Energy, Office of Nuclear Energy Nuclear Technology Research and Development program . Appendix A

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abstract = "Recent interest in U3Si2 as an advanced light water reactor fuel has driven assessment of numerous properties, but characterization of its response to H2O environments is absent from the literature. The behavior of U3Si2 in H2O containing atmospheres is investigated and presented in a two-part series of articles aimed to understand the degradation mechanism of U3Si2 in H2O. Reported here are thermogravimetric data for U3Si2 exposed to flowing steam at 250–470 °C. Additionally the response of U3Si2 to flowing Ar-6% H2 from 350 to 400 °C is presented. Microstructural degradation is observed following hours of exposure at 350 °C in steam. U3Si2 undergoes pulverization on the timescale of minutes when temperatures are increased above 400 °C. This mechanism is accelerated in flowing Ar-H2 at the same temperatures.",

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AU - Wood, E. Sooby

AU - White, J. T.

AU - Grote, C. J.

AU - Nelson, A. T.

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AB - Recent interest in U3Si2 as an advanced light water reactor fuel has driven assessment of numerous properties, but characterization of its response to H2O environments is absent from the literature. The behavior of U3Si2 in H2O containing atmospheres is investigated and presented in a two-part series of articles aimed to understand the degradation mechanism of U3Si2 in H2O. Reported here are thermogravimetric data for U3Si2 exposed to flowing steam at 250–470 °C. Additionally the response of U3Si2 to flowing Ar-6% H2 from 350 to 400 °C is presented. Microstructural degradation is observed following hours of exposure at 350 °C in steam. U3Si2 undergoes pulverization on the timescale of minutes when temperatures are increased above 400 °C. This mechanism is accelerated in flowing Ar-H2 at the same temperatures.

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U₃Si₂ behavior in H₂O: Part I, flowing steam and the effect of hydrogen

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