Modeling reactivity insertion experiments of TRISO particles in NSRR using BISON

Schappel, Danny; Brown, Nicholas R.; Terrani, Kurt A.

doi:10.1016/j.jnucmat.2019.151965

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Modeling reactivity insertion experiments of TRISO particles in NSRR using BISON

Schappel, Danny·Brown, Nicholas R.·Terrani, Kurt A.

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Abstract

This research presents BISON simulations of stress, temperature, and failure probability of tristructural isotropic (TRISO) fuel particles subjected to transient power pulse conditions in the Nuclear Safety Research Reactor (NSRR). We report that by modifying the default elastic properties of the PyC and the UO 2 coefficient of thermal expansion correlation, BISON was found to produce suitable agreement with the observed and independently simulated results when appropriate shape and scale Weibull parameters for SiC failure were chosen. The Weibull parameter effects were also explored within the range of SiC failure and were applied using experimental data from hemispherical crush testing.

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11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS BISON Fracture NSRR Reactivity Silicon carbide TRISO

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Schappel, Danny, Brown, Nicholas R., Terrani, Kurt A.. 2019-12-20. Modeling reactivity insertion experiments of TRISO particles in NSRR using BISON. https://doi.org/10.1016/j.jnucmat.2019.151965

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