Studies to enhance radiation and health monitoring at legacy sites are relevant and fall in the responsibilities of FMBA of Russia, which provides medical and health-care support to employees of enterprises under the State Corporation Rosatom, as well as the population living near these enterprises. The paper reviews data of long-term radiation and health monitoring (2005-2016) at nuclear and uranium legacy sites in Russia and the Central Asia countries, the methodical guidance of which was performed by State Scientific Center of the Russian Federation - A.I. Burnazyan Federal Medical Biophysical Center. The experience gained during the research allowed us identify the actual areas for the further work: the need for a comprehensive study to assess all significant risk factors to be evaluated; unification of collection and collation of radio-ecological data; improvement of the radiation protection system, taking into account international recommendations and methodological approaches to assessing the health conditions of the population.

The aim of the study. An analysis of the problems of the development of the dose-effect relationship (DER) in the assessment of the risk under exposure to ionizing radiation (IR) and harmful chemicals (HC) on human health and proposals for improving them. Material and methods. Problems of the development and application of the methodology for assessing the risk of exposure to IR and HC are in the area of delivering DER based on the results of biological experiments and epidemiological studies (ES). These problems are associated with such properties of the effects of exposure to IR and HCh as nonspecificity and latency, low statistical power, fragmentation of the actual information available on the studied effects, possible dependence on the level of the associated spontaneous morbidity or mortality rate. A number of DER models have been developed by national and international organizations. However, between these models, there are significant differences in the choice both of model parameters and the ratio between the multiplicative and additive dependencies on spontaneous effects. The relevance of improving DER models suitable for reliable predictive risk assessments of exposure to IR and HC remains. Results. In modern DER models, the ratio between the multiplicative and additive dependencies on spontaneous effects was chosen by an expert way on the basis of the available results of biological experiments and ESs without sufficient rigorous justification. This was reflected in the different choice of this ratio by different developers. For a more reasonable choice of the ratio, it is proposed to consider two possibilities: 1) implementing additional targeted biological research on the molecular-cellular and organismic levels; 2) a joint analysis of the results of two independent ESs on different cohorts affected by exposure to IR or HC. For IR there is a real opportunity to solve the problem according to the second option. A specific possible method of action in the second direction and an algorithm for its implementation are proposed. Conclusion. Current models of DER for IR and HC require further development, in particular, in terms of the relationship between multiplicative and additive dependencies in DER. A method of justifying the choice of this ratio is proposed and an algorithm for its implementation for IR is described.

Introduction. Currently, modern medical radiation technologies, including the use of radiopharmaceuticals, are becoming more widely used. At the same time, it should be noted that these technologies themselves have undergone a significant evolution towards improving their radiation safety. But while radiation technologies have been steadily improving, approaches to controlling and regulating activities with ionizing radiation sources remain highly conservative. In law enforcement practice, this approach leads more and more to excessive requirements that are not justified for the basic principles of radiation safety - rationing, justification, optimization. This paper substantiates the ways to improve the issues of regulation and regulation of activities using modern radiation technologies Purpose of research. Conducting radiation and hygiene assessment of working conditions in PET centers and developing proposals for improving regulatory requirements, taking into account the features of modern technologies Material and methods. Protocols of industrial radiation control, results of own research of effective equivalent doses, equivalent doses for the skin and lens of the eye by thermoluminescent dosimetry, timekeeping of the working time of the PET center staff were used. Results. As part of the work, the results of industrial radiation monitoring of the PET- center of a large medical organization were analyzed. It is shown that the annual radiation doses are within no more than 1/3 of the dose limit for limited personnel, most of whom receive less than 5 mS per year. The data of our research carried out based on the scientific LRC of the Department of radiochemistry of the Lomonosov Moscow State University are in good agreement with the data of the medical institution. Conducting time-lapse studies allowed us to conclude that the time of direct exposure of personnel is significantly less than the standard values provided for by regulatory documents, and the dose rates for many operations can not correspond to the values regulated by these documents. It is shown how a safe technology can relate, on formal grounds, to “highly dangerous”, which is a significant modern contradiction in the field of regulating activities with radiation sources. Conclusion. An important factor in ensuring radiation safety is the identification of critical groups of personnel, the most exposed organs, and tissues, taking into account the annual activity consumed. The standardized dose rate criteria laid down in regulatory documents do not provide for the use of indicators of the actual workload (time of exposure). It is necessary to introduce appropriate changes to the normative documents.

Policy management of institutes and business organizations’ activity, dealing with radiation sources, has more of a bulky and confusing complex of requirements at the present day. The requirements being very substantial, slow down economic growth of entire branches in the field of the beneficial use of radiation technologies, and, at the same time, do not provide the condition of radiation safety. Prime Minister Dmitriy Medvedev, without any coincidence, pointed out the problem during a plenary meeting as an overpressure of regulatory and supervisory bodies on the Russian private sector. According to him, the task can be solved with ‘a regulatory guillotine’. The upcoming article resembles the first attempt to analyze and sort reasons and factors, providing a glimpse of the current situation, search key elements that cause negative influence in the field taken. On the ground of analysis of regulatory documents, vast survey experience and estimation of radiation objects and technologies, authors suggest a new complex of requirements to provide radiation security, their breakdown of classes depending on danger level of radiation objects and operating with sources of ionizing radiation. The article presents the analysis of current regulatory documents on radiation hygiene field and radiation security, retrospective view on valid documents, the expertise of activity of regulatory and supervisory bodies as part of licensing of the activity with man-made sources of ionizing radiation.

Introduction. Authors present information on the results of social and hygienic monitoring of personnel’s health status at hazardous radiation facilities and the assigned contingent of healthcare institutions of Russia’s FMBA. The main causal patterns of the influence of risk factors on morbidity and mortality from malignant neoplasms (MNO) among employees of enterprises and the attached contingent of organizations served by healthcare institutions of the FMBA of Russia were revealed. Material and methods. The object of the study was the data on malignant neoplasms obtained from the Federal State Budgetary Institution FTSITEP FMBA of Russia and the Branch Medical and Dosimetric Register of the A.I. Burnazyan FMBA of Russia for 2012-2016. Comparative data of official medical statistics on the incidence of malignant neoplasms and mortality from them in the contingent served by FMBA hospitals, according to the nosological forms of ICD-10 and age groups with similar indices in Russia as a whole, were studied and analyzed (“NMITs Radiology” of the Ministry of Health of Russia). Results. An increase in the incidence of malignant neoplasms in Russia’s FMBA for 2012-2016 (328.4-359.6) and the Russian Federation (367.3-408.6) was noted. 9, which is significantly less than the all-Russian indices (201.0-201.6). The annual mortality rate in 2016 was lower in Russia’s FMBA patients (17.7%) than in the Russian Federation (23.3%). The five-year survival rate in Russia’s FMBA was close to that in the Russian Federation (49.9-54.3%.) It was noted that the largest number of cancer cases was observed in the older age groups: 40-59 years: 23.3-26.6%; 60-85 years: 72.2-68.3%, the same as in the Russian Federation. Conclusion. The research results can become the basis for the development of measures for medical and social rehabilitation of employees of enterprises and organizations served by medical and preventive institutions of the FMBA of Russia and the assigned contingent. In the area of the location of hazardous radiation facilities, constant monitoring and analysis of indicators of cancer incidence, carried out at a personal level using register technologies, is required.