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ST 6.2 –
Protección radiológica de Trabajadores II (orientada a la medicina)
INTERNAL DOSE ASSESSMENT IN THE RADIOPHARMACEUTICAL
PRODUCTION PLANT AT IPEN
Todo, Alberto*; Gerulis, Eduardo;
Cardoso, Joaquin; Rodrigues Jr., Orlando
IPEN. Brasil.
* Autor responsable, email:
astodo@ipen.br
The radiopharmaceutical production is among the major activities in the Institute of Nuclear
Energy and Research - IPEN. To ensure the output, there are qualified professionals performing
activities in the installation such as production, maintenance and projects. During their tasks
some workers handle open sources or execute activities in areas with high risk to an internal
contamination by inhalation or ingestion. These workers are included in an internal monitoring
program to certify if they are adequately protected from radionuclide intakes. The internal
contamination detection is performed at the In Vivo Monitoring Laboratory of the IPEN. The
objective of this study is to take the whole body and thyroid monitoring results recorded from
2005 to 2014 and make a correlation among the assessed values of internal dose with the
improvement carried out in the radiopharmaceutical production plant within this period. The
study were based in a research called “Search of Variables” for the operations carried out in the
restricted areas of radiopharmaceutical production plant, taking into account the dose
distribution data for all the tasks recorded by the radioprotection service. This methodology aims
to identify and determine the key variables that impact on the worker's dose. The results were
presented for the following variables: Individual occupationally exposed - IOE, operation
variable, Area/Cell, Type of Task and Duration of Operation, which depend on the variable
Dose. In spite of growth rate in the production of radiopharmaceutical, this study has shown that
the improvements in the plant have contributed to a positive impact in the dose reduction of the
workers.