Assessment of radiation risk coefficients of solid cancer incidence for the male personnel of Rosatom state corporation from the past radiation exposure allowing for dose uncertainty

Estimates of radiation risk coefficients of solid cancer incidence for the male personnel of the Rosatom State Corporation in dependence on the attained age and the previous duration of works with sources of ionizing radiation (duration of exposure period) are received. It is shown that for the given attained age, risk coefficients rise with increase in duration of previous exposure period. Allowing for dose uncertainty, dependence of the 95% upper confidential borders of risk coefficients becomes not monotonous. For a conservative assessment of radiation risk of solid cancer incidence in the studied group it is possible to use coefficient of risk 0,090 per 1 Sv, and allowing for 15% of uncertainty of an annual dose - 0.096 per 1 Sv. Taking into account coefficient of a lethality of solid cancer cases for the male Russian population, coefficients of radiation risk of mortality are equal 0.045 per 1 Sv and 0,048 per 1 Sv, respectively. The last value by 1.17 times exceeds the nominal risk coefficient containing in the operating Russian Standards of radiation safety.