On radiation threshold in standardization of hazard factors

The concepts of threshold and nonthreshold irradiation are discussed. Instead of the concept ''ideal threshold'' in normalization suggested is the term ''conditional threshold'' being determined by a conditional threshold dose, on exposure to which the product of probability of test-effect manifestation by the number of the given group of objects equals one. The suggested definition of the threshold makes it possible to substantiate a spontaneously formed tendency for differentiating the standards depending on the number of groups under consideration; it has been long existent in the field of the radiation factor. The concept ''conditional threshold'' is in conformity with the approach to standardization on the basis of nonadmission of risk realization