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Radiation Protection Dosimetry Advance Access originally published online on July 20, 2004
Radiation Protection Dosimetry 2004 111(3):323-326; doi:10.1093/rpd/nch347
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Radiation Protection Dosimetry Vol. 111, No. 3 © Oxford University Press 2004; all rights reserved

Technical Note

Dosimetric assessment from 212Pb inhalation at a thorium purification plant

M. P. Campos* and B. R. S. Pecequilo

Instituto de Pesquisas Energéticas e Nucleares, Divisão de Radiometria Ambiental, Av. Prof. Lineu Prestes, 2242, Cidade Universitária 05508-900, São Paulo, SP, Brazil

* Corresponding author: mpcampos{at}ipen.br

At the Instituto de Pesquisas Energéticas e Nucleares (IPEN), São Paulo, Brazil, there is a facility (thorium purification plant) where materials with high thorium concentrations are manipulated. In order to estimate afterwards the lung cancer risk for the workers, the thoron daughter (212Pb) levels were assessed and the committed effective and lung committed equivalent doses for workers in place. A total of 28 air filter samples were measured by total alpha counting through the modified Kusnetz method, to determine the 212Pb concentraion. The committed effective dose and lung committed equivalent dose due to 212Pb inhalation were derived from compartmental analysis following the ICRP 66 lung compartmental model, and ICRP 67 lead metabolic model.


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