Evaluation of the waste profile from (medical) health services of Belo Horizonte concerned to the presence of radioactive wastes in the disposal system / Avaliação do perfil dos resíduos de serviços de saúde de Belo Horizonte quanto à presença de rejeitos radioativos na destinação final
AUTOR(ES)
Adirson Monteiro de Castro
DATA DE PUBLICAÇÃO
2005
RESUMO
The medical procedures of diagnosis and treatment that use radiopharmaceuticals generate radioactive wastes that can, after reaching the release limit, follow the conventional ways of collection and disposal of the urban solid wastes. This research aims to detect radiometrically the presence of radioactive wastes in the health-care wastes at the final disposal. It is pointed out that the legal limit for the release of solid wastes established by Brazilian National Commission of Nuclear Energy (CNEN) is 7,5x104 Bq/kg (2 Ci/kg). Measurements in the material of the garbage trucks that make the special collect from Health Service installations are performed, at Belo Horizonte sanitary landfill, using a NaI scintillation counter. Values above the established limit were found in 60% of the cases. The spectral analysis of 6 samples showed the presence of 99mTc in 5 of them and 131I in one. These radionuclides are the most common radionuclides used in Nuclear Medicine. In conclusion there are radioactive wastes released together with the health service wastes, due to the disregard of the decay time until the legal limit is achieved.
ASSUNTO(S)
radioisótopos belo horizonte nuclear medicine belo horizonte medicina nuclear estabelecimentos médicos radioisotopes disposição final de rejeitos radioativos radiofármacos radioactive waste disposal radiopharmaceuticals medical establishments residuos radioativos
