September 1999:
International symposium on technologically enhanced natural radiation (TENR-2)
      Rio de Janeiro
September 2012:
Social and tourist visit
      Sao Paolo, Belo Horizonte, Ilheus, Goiania, Ouro Preto, Patos de Minas, Ipiau
October 2014:
National symposium on minerals and radioactivity: managing NORM - radiation protection
      Rio de Janeiro
October 2016:
Naturally Occurring Radioactive Material (NORM-VIII) symposum
      Rio de Janeiro