RESUMO
The average activity of xenon-133 within and at approximately 100 kilometers from Albany, New York, from April to July 1975 was 2.6 picocuries per cubic meter of air. The source was gaseous effluents from boiling water reactors located in the northeastern United States. Its 5.29-day half-life makes xenon-133 an appropriate isotope to observe for the study of regional and hemispheric dispersion of pollutants.
Assuntos
Radioisótopos do Iodo/análise , Poluentes Radioativos/análise , Poluentes Radioativos do Ar/análise , Animais , Contaminação Radioativa de Alimentos/análise , Germânio , Leite/análise , Poluentes Radioativos do Solo/análise , Análise Espectral , Poluentes Radioativos da Água/análise , Raios XRESUMO
International and US radiation protection standards are based upon risk assessment and risk management processes. The assessment of radiation risk is derived from the linear no-threshold (LNT) model. Risk management is based on more subjective value judgements. If the radiation dose-response was found to be hormetic, considerable quantitative data would be needed before current radiation protection standards would change. There would be added complexity, and consideration might have to be given to the additive effects of an individual's exposures to medical radiation and other potential carcinogens.