Página 373 - irpa

373 ST 4.3 – Gestión de residuos radiactivos
COMPARISON BETWEEN RADIOACTIVE WASTE MANAGEMENT AND
THE EXPOSURE OF WORKERS
Guimarães, M. I. C. C.1 *; Pena, G. P.2; Santos, J. S.1; Gonzalez, J. A.1 ;
Pássaro, B. M.1; Videira, H. S.1; Lopes, A. B.1 ; Buchpiguel, C. A.1
1 Nuclear Medicine Service of InRad Hospital das Clínicas da Faculdade de Medicina da
Universidade de São Paulo (NMC InRad HCFMSUP). Brazil
2 Pontifícia Universidade Católica de São Paulo (PUC-SP). Brazil
* Autor responsable, email: micguima@usp.br
Depending on how the radioactive waste is managed it can become an additional source of
exposure to the worker. In order to minimize this exposure the amount of radioactive waste
generated by a nuclear medicine center was analyzed, quantified, qualified and compared with
the doses obtained by personal dosimetry in the Nuclear Medicine Service of InRad HCFMUSP.
The greatest quantity of radioactive waste produced was of Tc-99m. Approximately 90% of the
solid waste was non-compactable, such as needles and others, and the remaining 10% were of
compactable waste (gauze, gloves and other). Among the years there has been a significant
variation in the amount of waste, which is directly connected with the quantity of exams
performed. The medium dose value observed was of 0.6 mSv per month for all the workers,
including radiopharmacists, nurses and physicists (dosimeters positioned in thorax) and 1.6
mSv in wrist dosimeters. We observed that months with greater amount of waste coincided with
months of higher doses. However, this increase was not significant and was not proportional
due to optimization in handling the waste.