1. Dosimetric assessment from 212Pb inhalation at a thorium purification plant.
- Author
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Campos MP and Pecequilo BR
- Subjects
- Administration, Inhalation, Air Pollutants, Radioactive analysis, Air Pollutants, Radioactive pharmacokinetics, Body Burden, Brazil epidemiology, Humans, Lead Radioisotopes administration & dosage, Radiation Dosage, Relative Biological Effectiveness, Risk Factors, Thorium administration & dosage, Thorium analysis, Thorium isolation & purification, Thorium pharmacokinetics, Lead Radioisotopes analysis, Lead Radioisotopes pharmacokinetics, Lung metabolism, Occupational Exposure analysis, Radiation Protection methods, Radiometry methods, Risk Assessment methods
- Abstract
At the Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao 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.
- Published
- 2004
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