d="p0010">Fission gas release in nuclear fuels was studied in the framework of percolation theory.
dd><dt class="label">•dt><dd>d="p0015">The nuclear fuel cross-section microstructure was modeled through grain boundary networks.
dd><dt class="label">•dt><dd>d="p0020">The grain boundaries were classified randomly or according to its crystallography.
dd><dt class="label">•dt><dd>d="p0025">Differences in topology and percolation behavior for both kinds networks were determined.
dd>dl>