首页|Modeling high burnup structure in oxide fuels for application to fuel performance codes. Part II: Porosity evolution
Modeling high burnup structure in oxide fuels for application to fuel performance codes. Part II: Porosity evolution
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NSTL
Elsevier
We propose a model describing the high burnup structure inter-granular porosity evolution under irradi-ation. The evolution of the porosity collecting the gas diffusing from the grains is modeled by exploiting a second-order Fokker-Planck expansion of the cluster-dynamics master equations governing the prob-lem, considering nucleation of pores, gas absorption due to the diffusional flow from the grains, size-dependent re-solution of gas from pores due to interaction with fission fragments, vacancy absorption, and pore coalescence. Model predictions on xenon local retention, matrix fuel swelling, and porosity evo-lution are compared to experimental data and to models available in fuel performance codes.(c) 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license( http://creativecommons.org/licenses/by/4.0/ )
High burnup structurePorosityOxide fuelFission gas behaviourFuel performance codesFISSION-GAS BEHAVIORIRRADIATION-INDUCED RECRYSTALLIZATIONEQUATION-OF-STATEUO2 FUELRIM STRUCTUREUP STRUCTURERE-SOLUTIONRELEASEDIFFUSIONFRAGMENTATION
Barani, Tommaso、Pizzocri, Davide、Cappia, Fabiola、Pastore, Giovanni、Luzzi, Lelio、Van Uffelen, Paul
NSTL
Elsevier
