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Human exposure to high natural background radiation: what can it teach us about radiation risks?

2009; IOP Publishing; Volume: 29; Issue: 2A Linguagem: Inglês

10.1088/0952-4746/29/2a/s03

1361-6498

J.H. Hendry, Steven L. Simon, Andrzej Wójcik, Mehdi Sohrabi, W. Burkart, Elisabeth Cardis, Dominique Laurier, M. Tirmarche, Isamu Hayata,

Radioactive contamination and transfer

Natural radiation is the major source of human exposure to ionising radiation, and its largest contributing component to effective dose arises from inhalation of 222Rn and its radioactive progeny. However, despite extensive knowledge of radiation risks gained through epidemiologic investigations and mechanistic considerations, the health effects of chronic low-level radiation exposure are still poorly understood. The present paper reviews the possible contribution of studies of populations living in high natural background radiation (HNBR) areas (Guarapari, Brazil; Kerala, India; Ramsar, Iran; Yangjiang, China), including radon-prone areas, to low dose risk estimation.