Protection of the public in a large-scale radiation accident: mitigation of negative social consequences of protective actions. Part 1. Interpretation of dose characteristics of emergency

The protective actions which were carried out with the purpose to reduce public exposure to radiation derived from the accidents at Chernobyl and Fukushima-1 nuclear power plants have caused negative consequences of social – psychological both social-economic character and medical nonradiological consequences. The corresponding damage put to the population of involved territories and to the entire society has considerably exceeded hypothetical benefit of aversion of radiation exposure. In the present study some possible ways of aprioristic maintenance of mitigation of the social damage accompanying realization of anti-radiation protective actions at large-scale radiation accident are considered. For the characteristic of total amount of the damage caused by protective actions, the scale of radiation and social protection in terms of a population of officially involved territories is accepted. The analysis of decisions on protection of the population in the Russian Federation against consequences of Chernobyl accident shows that at concrete radiation situation scales of protective actions differ more than on the order of magnitude, depending on criteria of decision-making and their administrative realization. Another factor that determines the scale of the accident is the degree of conservatism in the assessment of the radiation situation. The analysis of results of individual dosimetric examination of inhabitants of the western districts of the Bryansk region has shown steady values of statistical characteristics of distribution of the individual doses of an external and internal radiation caused by Chernobyl accident, according to which the value of 95% quantile of distribution in 2–3 times exceeds the average value at an examined sample of the population. Thus, application of the concept of “representative person» leads to overestimation of projected doses concerning to those corresponding to stochastic radiation effects. The results of such overestimation are expansion of scales of protective actions, prolongation of emergency, increase in accompanying social damage. As one of the ways to maintain aprioristic mitigation of social damage accompanying protective actions, the following position is offered. At a stage of an emergency, when there is enough information to consider, that the maximal public exposure to radiation will not achieve thresholds of deterministic effects, the decisions on protective actions violating normal human beings and socioeconomic functioning of territory is justified to accept on the basis of doses for the average person, instead of those for the most exposed people