Impact of variable porosity models on the safety of high temperature pebble bed gas-cooled reactors. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 8, n. 3A (Suppl.), 2021. DOI: 10.15392/bjrs.v8i3A.1542. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/1542.. Acesso em: 3 jul. 2024.