A part of the Urals territory was contaminated with ⁹⁰Sr and ¹³⁷Cs in the 1950s as a result of accidents at the “Mayak” Production Association. The paper describes the analysis of in vivo 90Sr measurements in Urals residents. The measurements were performed with the use of Whole-Body Counter SICH-9.1M in 2006–2012. Totally 5840 measurements for 4876 persons were performed from 2006 to 2012; maximal measured value was 24 kBq. Earlier, similar measurements were performed with SICH-9.1 (1974–1997). Comparison of the results obtained with SICH-9.1 and SICH-9.1.M has shown a good agreement of the two data sets

The investigation of frequencies of micronuclei in mucocytes cover-patching epithelium of the gastric mucosa (GM) in the group of persons living in the contaminated territories (RZT) and in the group of persons who had not a history of radiation exposure, living in Saint-Petersburg. All respondents were patients with chronic gastritis (ICD-10K29.3). Micronucleus test was carried out retrospectively in histological sections obtained from antral gastrobioptatov. Along with the micronucleus test in gastrobioptatah examined patients were conducted immunohistochemical determination of H. pylori. There were significant differences between the residents of contaminated areas and those who have not had a history of radiation exposure in terms of "frequency of mukotsitov gastric mucosa with micronuclei." Maximum frequency of mucocytes with micronuclei was observed in individuals living in radiation-contaminated areas gastric mucosa which was infected with Helicobacter pylori. In the group from radiation-contaminated areas with HPassociated gastritis incidence mucocytes with micronuclei in the gastric mucosa was five times higher than that of patients whose mucosa was not infected HP (p <0.01). Thus, we can assume that the Helicobacter pylori potentiates the mutagenic effects of radiation factor.

An article contains the data on the investigations of season and long-term variations of radiation safety indexes of the water of some underground sources and centralized water-supply system of Tver city.

Average annual individual effective doses from natural exposure of the population of Russian Federation are very diverse. At the same time exposure doses inside one territory could also be very different from the average value for this territory. In this paper we evaluated doses of natural exposure of the population living in different administrative units of the Tyva Republic. For the calculation of natural exposure dose we used the results of studies conducted in various administrative areas of the Tyva Republic in the period from 2007 to 2011. It is shown that the range of the average annual individual effective doses of natural exposure of the population in various administrative areas of the Tyva Republic is very broad. Thus, in some administrative areas of the republic average annual individual effective dose of natural exposure differs from the average regional value – 5,21 mSv/year in two or more times. The author also points out the main reasons for the enhanced natural exposure of the population of Tyva Republic, carries out the dependence of gamma background in the open places in the administrative areas on their geographical location in the region.

The paper presents the results of risk assessment for the population of Saint-Petersburg from residential exposure to radon and progeny considering interaction with tobacco smoking. U.S. EPA model was used. About 17% of lung cancer deaths in the general population could be radon-induced and the lifetime attributable risk for the population is about 8%.

An article describes radiation risk factors for several gender-age population groups according to Russian statistical and medical-demographic data, evaluates the lethality rate for separate nosologic forms of malignant neoplasms based on Russian cancer registries according to the method of the International Agency for Cancer Research. Relative damage factors are calculated for the gender-age groups under consideration. The tissue weighting factors recommended by ICRP to calculate effective doses are compared with relative damage factors calculated by ICRP for the nominal population and with similar factors calculated in this work for separate population cohorts in theRussian Federation. The significance of differences and the feasibility of using tissue weighting factors adapted for the Russian population in assessing population risks in cohorts of different gender-age compositions have been assessed.

The study which had been conducted in the period from 1990 to 2000’s in the settlements ofGomelregion showed that the average internal exposure doses of population living in the settlements situated on territories with equal levels of contamination density were considerably different. The reasons for the difference have been revealed. It was shown that not only radiation contamination of territory but also a range of factors of non-radiation origin have influence on formation of internal exposure dose. The hypothesis has been approved that internal exposure dose of each individual and also of each family has its certain place, constant in time at a dose distribution curve. This appropriateness had been used as a methodological basis for reconstruction of subjects’ individual doses for any time period. Method for estimating the average annual effective exposure doses of inhabitants living in contaminated settlements of theBelarusRepublichad been developed. The results of the Whole Body Counter measurements had been used for direct assessment of internal exposure dose and as the basis for developing a model. Model for the dose estimation is based on the classification of settlements according to regional characteristics of soil, which cause 137Cs in taking with locally produced foodstuff. The model is also based on regression of daily 137Cs intake on the density contamination of the soil for each region. The effect of the indirect factors on the dose forming had been taken into account: the number of inhabitants and the area of forest around the settlement. According to the developed method, there had been created a Catalog of Average Annual Effective Doses of Residents of the Belarus Republic.

Science Index system for information analysis is one of effective modern indexes of innovative activity of Russian research and educational personnel, research and educational institutions. However, it should be noted that this assessment system does not yet include such important parameters as data on patent analysis and dissertation research. The article describes information search and preliminary bibliometric assessment of publication activity of the authors and some research institutions and periodicals in the field of radiation hygiene and medicine.