A short review is presented of the results of long-standing research into the hot particles released into the environment after the Chemobyl accident, and their radiobiological significance.
Due to the lack of direct measurements of hot particles in the lung, a conceptual method has been developed to estimate integral lung intake from measurements of soil contamination.
The significance of the beta component of the radiation from hot particles has been reconsidered because this component may give rise to preconditions for oncogenic effects.
A modification factor F has been introduced, which is defined as the ratio of average risks for different conditions of irradiation.
It is shown that linear dose-effect models give the same results for uniform and point irradiation.
Over the dose range 0.1 to 2 Gy it was found that a hot particle gives a higher risk of oncogenic detriment than the corresponding uniform dose distribution (F>1).
The corresponding modification factor shows a maximum value of 5 at - 0.6 Gy.
Mots-clés Pascal : Accident, Centrale nucléaire, Homme, Effet biologique, Radiolésion, Particule, Inhalation, Pollution radioactive, Radiocontamination, Sol, Carcinogenèse, Irradiation bêta, Produit radioactif, Chernobyl, Epidémiologie, Cancérologie
Mots-clés Pascal anglais : Accident, Nuclear power plant, Human, Biological effect, Radiation injury, Particle, Inhalation, Radioactive pollution, Radioactive contamination, Soils, Carcinogenesis, Beta irradiation, Radioactive product, Epidemiology, Cancerology
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0412268
Code Inist : 002B30A02A. Création : 01/03/1996.