Saint-Petersburg Institute of Radiation Hygiene has undertaken in 2009-2010 selective regional study of exposure levels of adult patients during radiological diagnostic procedures in 20 hospitals of the city Saint-Petersburg and the Leningrad region. We examined 52 X-ray machines, 14 computed tomography rooms and 9 angiography rooms. The average effective doses, depending on the technology and type of patient examination, varied within the following limits: routine radiographic procedures - from 0.05 mSv to 0.6 mSv, computed tomography procedures - from 0.6 to 17.5 mSv, interventional examinations - from 6 to 60 mSv. The obtained effective doses of the patients in the studied hospitals of Sant-Petersburg and Leningrad region are compared with the average values recommended in the statistical form 3-DOS, and with published foreign data.

The article presents results of research done for evaluation of the average annual equivalent equilibrium volumetric activity of radon isotopes in the air of premises of child educational institutions located in the territory of a number of Russian Federation subject territories. It is shown that the indicator value for some buildings of these institutions exceeds not only the norm of 200 Bq/m3 for the existing public buildings, specified in the Radiation Safety Norms-99/2009 (NRB-99/2009), but even the level of 400 Bq/m3, demanding according to the item 5.1.4 of the Main Sanitary Rules for Radiation Safety -99/2010 (OSPORB-99/2010) that the issue of reprofiling of the building or part of premises must be considered when this level is exceeded. The experience of collaboration between Rospotrebnadzor Administration with the Administration of the Federation subject territory and municipalities for implementation of targeted radon mitigation measures at child preschool and school institutions is presented on an example of Sain-Petersburg.

The paper provides the results of a study of the local public attitude to the problem of peaceful nuclear explosions (PNE) which were carried out in the Ivanovo, Murmansk and Perm regions and in the Republic of Sakha (Yakutia) in the last century. An estimate of the mass media information regarding consequences of the PNEs is given. The study shows that the local citizens are ready to deal with reliable sources of objective information about consequences of the PNEs. The recommendations on information of the general public about PNE are presented.

The paper presents an assessment of radiation factor role for the thyroid cancer forming at persons exposed by the Chernobyl accident at the age from 0 to 18 years. Investigated cohort was formed from 2916 persons exposed in consequence of the Chernobyl accident during childhood and adolescence; it was stratified in 3 age groups and 4 dose intervals. All investigated persons passed through the deep double examination during the period from 1997 to 2004. Information about absorbed exposure doses for thyroid gland, calculated on the base of direct measurements in May and June 1986 was available for all persons. The increase of thyroid cancer morbidity for the boys and girls exposed by the Chernobyl accident at the age from 0 to 18 years with the increase of dose was revealed as the result of conducted radiation and epidemiologic survey. Excess relative risk for the male persons varied from 4.81 per 1.0 Gy at the age of 11 and older to 15.62 per 1.0 Gy for the age group from 4 to 10 years. For the female persons ERR was 5.37 per 1.0 Gy for the age group from 4 to 10 years and 8.32 per 1.0 Gy for the age of 11 and older.

Article grows out of the comparative analysis of two publications of ICRP and is devoted features of practice of application of nominal detriment coefficients, a way of their calculation and a correctness of use of terminology in the field of a quantitative estimation of degree of radiating influence on human's health.

The article outlines peculiarities of current dose assessment for the children living in the territories radioactively contaminated due to the Chernobyl accident. The results of annual exposure dose assessment for the children of various age groups and adult population of three subject territories of the Russian Federation referred to the zones of radioactive contamination are presented. A comparison of obtained estimations is done.

The basic principles of rehabilitation and sanitation measures for employees of the nuclear industry are considered. The scope, structure and efficiency of sanatorium treatment are analyzed. The basic directions for rehabilitation and sanitation measures for employees of nuclear industry are substantiated.

In the articcle are described in detail tge history of organization and main results of tge 40 years scientific and scientific-practical activity of tge first in the system of Public Health Ministry od Russian Federation specialized scienific department - the department of industrial radiation hygiene of the Saint-Petersburg Research Institute of Radiation Hygiene after professor P.V. Ramzaev.