Dr. Denison de Souza Santos is working for the Brazilian National Commission for Nuclear Energy (CNEN) for the last 25 years. He is former head of the Dosimetry Division of the Institute for Radiation Protection and Dosimetry (IRD/CNEN) and member of IRD graduate education program. He supervises students in Master of Sciences and Doctorate programs in the fields of Monte Carlo simulations, radiation protection and radiation dosimetry.
Dr. de Souza Santos graduated in Physics (1987), followed by a Master of Sciences in Physics (1991) and Doctorate in Physics (1997) all from Pontifícia Universidade Católica do Rio de Janeiro, Brazil. His thesis was dealing with the subject of position sensitive detectors for high energy physics experiments.
Dr. de Souza Santos acted as an expert for the International Atomic Energy Agency and for UNSCEAR since 2011. He is member of ICRP Committee 2 on Doses from Radiation Exposures.
Dr. de Souza Santos has been alternate representative of Brazil to UNSCEAR since the sixty-fourth session in 2017 and representative since the seventy-second session in 2025.
Dr. Simone Kodlulovich Renha is working in the Medical Physics Department at IRD, where she supervises Master's and Doctorate students in diagnostic radiology and radiation protection. She led the Diagnostic Radiology Division at the Instituto de Radioproteção e Dosimetria (IRD/CNEN. Additionally, Dr. Kodlulovich serves as an associate editor and reviewer for the journal Radiation Protection and Dosimetry. She is also a reviewer for Applied Radiation and Isotopes, as well as the Brazilian Journal of Radiation Sciences.
Dr. Simone Kodlulovich Renha graduated with a degree in Physics and obtained her master’s and PhD degrees in Nuclear Technology, specializing in medical physics, from the Instituto de Pesquisas Energéticas e Nucleares. She also completed a postdoctoral fellowship at the Universidade do Estado do Rio de Janeiro in Brazil. With over 27 years of experience in the field, Dr. Kodlulovich has been a researcher at Brazil's National Commission of Nuclear Energy since 1999.
Since 2001, she has been an expert for the International Atomic Energy Agency (IAEA). She was president of the Latin America Association of Medical Physics and Federation of Radioprotection of Latin America and the Caribbean. She chaired IOMP committees and was a member of the International medical physics certification board (IMPCB). Additionally, she was the secretariat of the ABNT CE 26:020.04 Study Commission. She was awarded Fellow of the International Organization for Medical Physics (FIOMP) in 2017 and Fellow of the International Union for Physical and Engineering Sciences in Medicine (IUPESM) in 2022.
Dr. Kodlulovich has been the alternate representative of Brazil to UNSCEAR since the 72nd session in 2025. She is also the national contact person for the Committee’s global survey on medical exposure.
