scholarly journals HYGIENIC EVALUATION OF EXPOSURE DOSES FOR THE VORONEZH REGION POPULATION FROM THE NATURAL AND TECHNOGENOUSLY MODIFIED BACKGROUND

2018 ◽  
Vol 11 (2) ◽  
pp. 74-82 ◽  
Author(s):  
Yu. I. Stepkin ◽  
M. K. Kuzmichev ◽  
O. V. Klepikov ◽  
E. М. Studenikina
Keyword(s):  
Ionizing Radiation ◽  
Total Dose ◽  
Effective Dose ◽  
Annual Effective Dose ◽  
Population Exposure ◽  
Radiation Background ◽  
Natural Sources ◽  
Safety Standards ◽  
Voronezh Region ◽  
Slight Upward Trend

The purpose of the study was to estimate the doses to the Voronezh region population from natural sources of ionizing radiation and the technologically altered background in the territory of Voronezh Region. The data of forms of state statistical observation No. 4-DOZ “Information on the doses of population exposure due to natural and technologically altered background” for 20102017 and the radiation and hygienic passport of the territory of the Voronezh Region were used. The average annual per caput effective dose due to all types of ionizing radiation remains stable with a slight upward trend and lies in the range from 2.925 (2010) to 3.656 mSv (2017). Natural sources are the main dose-forming factors for the population. Their annual contribution to the annual effective dose ranges from 74.96 to 83.65%. The leading contribution to the total dose from natural sources is the exposure due to the inhalation of radon isotopes: it ranges from 37.6 to 51.1%. In second place,there is the share of external exposure from sources of terrigenous origin, which ranges from 21.2 to 28.9% of the total dose. The average annual effective dose of natural exposure to humans varies from 2,355 to 2,980 mSv / year, the exposure from radon – from 0,83 to 1,65 mSv / year. The dose from technogenic-altered radiation background, including global radioactive fallout due to atmospheric nuclear tests and due to past radiation accidents are insignificant (0,062 mSv / year). Its annual contribution to the total dose is less than 2%. Based on the results of the assessment of the indicators characterizing the level of exposure of sources of ionizing radiation to natural and technogenic-altered radiation background, no excess of radiation safety standards has been recorded. The situation associated with exposure to ionizing radiation sources in the Voronezh region has been described as safe for the last 8 years.

scholarly journals The Influence of Natural Sources on Radiation Exposure Levels in the Population of the Arkhangelsk Region

2020 ◽  
pp. 35-39
Author(s):  
PM Gricai ◽  
AV Mironovskaya ◽  
TN Unguryanu
Keyword(s):  
Ionizing Radiation ◽  
Effective Dose ◽  
Background Radiation ◽  
Internal Exposure ◽  
Population Exposure ◽  
Volumetric Activity ◽  
Natural Sources ◽  
Arkhangelsk Region ◽  
The Individual ◽  
Radon Isotopes

Introduction: The issue of radiation safety in terms of population exposure to natural sources of background radiation remains relevant since, according to the results of numerous studies, among all sources of ionizing radiation the natural ones contribute the most to the population exposure worldwide. Our purpose was to assess the contribution of natural sources of background radiation to the individual effective dose of the population of the Arkhangelsk Region. Materials and methods: We measured residential indoor and outdoor gamma dose rates and the residential indoor equivalent equilibrium volumetric activity of radon isotopes. We also analyzed data of statistical form No. 4-DOZ “Information about population exposure doses attributed to the natural and anthropogenically altered background radiation” and radiation hygiene passportization conducted in 2008–2017 by cities and districts of the Arkhangelsk Region and estimated long-term average indicators of the individual effective dose of radiation and chain indicators of the growth rate. Results: We established that the internal exposure to radon isotopes (46.8%) and external terrigenous exposure (23.6%) contributed the most to the individual effective dose due to natural sources in the population of the Arkhangelsk Region. In 2008–2017, the individual effective dose attributed to natural sources was 2.50 mSv/yr, to external exposure – 0.59 mSv/yr, and to internal exposure to radon isotopes – 1.17 mSv/yr. The analysis of average values of the equivalent equilibrium volumetric activity of radon isotopes and the gamma radiation dose rate in residential buildings of various type (wooden, single-story stone and multistory stone) in the Arkhangelsk Region supported the conclusion about the significant contribution of the former to the individual effective dose due to natural sources. Conclusions: We established the contribution of natural sources of ionizing radiation to the total doses of the population.

Justification of Remediation Criteria of Uranium Legacy Sites

2021 ◽  
Vol 66 (4) ◽  
pp. 54-57
Author(s):  
A. Titov ◽  
N. Shandala ◽  
Yu. Bel'skih ◽  
D. Isaev ◽  
M. Semenova ◽  
...  
Keyword(s):  
Effective Dose ◽  
Radiation Safety ◽  
Annual Effective Dose ◽  
Uranium Mining ◽  
Radioactive Material ◽  
Reference Level ◽  
Federal Law ◽  
Reference Levels ◽  
Economic Activities ◽  
Safety Standards

Purpose: To present approaches to establishing the criteria for remediation of sites contaminated due to past activities of uranium mining and milling facilities. These facilities are considered today as uranium legacy. Results: This paper presents the justified reference levels expressed in terms of annual effective dose values, which are recommended for using as remediation criteria for sites contaminated due to past activities of uranium mining and milling facilities (uranium legacy sites). Depending on further use of the sites after remediation, these criteria range from 1 µSv/year, in case of temporary presence of the population, to 10 µSv/year, in case of permanent residence of the population and conducting economic activities. Conclusions: In accordance with the international basic safety standards, accepted more than 10 years ago, exposure situations from radioactive material retained from previous activities refer to the existing exposure situation. Nevertheless, neither Federal Law “On Radiation Safety of the Population” nor Radiation Safety Standards have so far introduced terms “existing exposure situation” covering exposure at nuclear and uranium legacy sites and “reference level”, which is used to assure radiation safety of the population living at legacy sites or using these sites for the purpose of the economic activities.

Radiation Safety Standards and Basic Health Rules for Radiation Safety: Proposal on the Development of New Versions

2019 ◽  
Vol 64 (5) ◽  
pp. 15-19
Author(s):  
А. Симаков ◽  
A. Simakov ◽  
Ю. Абрамов ◽  
Yu. Abramov
Keyword(s):  
Effective Dose ◽  
Radiation Safety ◽  
Specific Activity ◽  
Annual Effective Dose ◽  
Uranium Isotopes ◽  
Time Interval ◽  
Solid Materials ◽  
Safety Standards ◽  
Basic Health ◽  
One Year

The objective of this work is to enhance national Radiation safety standards (NRB) and Basic Health Rules for Radiation Safety (OSPORB).  This article discusses proposals how to amend new versions of the fundamental regulatory documents – national NRB and OSPORB as regards the interpretation of the term “limit of the annual effective dose of manmade individual exposure” and the health physics limiting the content of artificial radionuclides in solid materials for their unrestricted use. In current Radiation Safety Standards, NRB-99/2009 (paragraph 3.1.5.), in contrast to the Federal Law of 09.01.1996 No 3-FZ “On the Public Radiation Protection” and provisions of draft International Basic Safety Standards, annual effective dose means gross effective dose of external and internal exposure, received for the calendar year. The article describes the situation where the doses of a conditional worker do not exceed the dose limits in a single calendar year, i.e. < 50 mSv, however, for any arbitrarily taken time interval equal to one year, the annual dose limit of 50 mSv is repeatedly exceeded. Therefore, the following amendment is proposed to be made in new version of the NRB: “Annual effective dose means the sum of the effective external dose received for any arbitrarily taken time interval equal to one year and the ambient effective internal dose due to the intake of radionuclides in the body over the same period”. In current Basic Health Rules for Radiation Safety, OSPORB 99/2010, Annex 3 “The Specific Activities of Artificial Radionuclides, at which Unrestricted Use of Materials is Permitted” does not include the uranium isotopes 234U, 235U and 238U; this contradicts paragraph 5.2.10 of OSPORB-99/2010, according to which these isotopes should be attributed to manmade radiation sources.  The article justifies the expediency of establishing the upper value of the specific activity of 1 Bq/g for the main uranium radionuclides in solid materials in case of their unlimited use. The supplement of Appendix 3 is proposed to the new version of the OSPORB with uranium isotopes 234U, 235U, 238U, setting the standard for their specific activity of 1 Bq/g in solid materials for unlimited use.

scholarly journals Results of the 20-year period of functioning of the Federal Databank on the natural radiation doses to the population of the Russian Federation

2021 ◽  
Vol 14 (3) ◽  
pp. 112-125
Author(s):  
T. A. Kormanovskaya ◽  
R. R. Akhmatdinov ◽  
G. A. Gorskiy
Keyword(s):  
Data Collection ◽  
Russian Federation ◽  
Annual Effective Dose ◽  
Radiation Doses ◽  
Natural Radiation ◽  
Radiation Background ◽  
Natural Sources ◽  
The Public ◽  
The Russian Federation ◽  
The Mean

This study is focused on the analysis of the results of the functioning of the Federal Databank on the doses to the public of the Russian Federation from natural and man-made modified radiation background as a part of Joint governmental system of control and accounting of the doses from ionizing exposure in 2001-2020. The mean individual annual effective dose of the public of the Russian Federation from natural sources of ionizing exposure, calculated based on the data from all measurements in 2001-2020, is equal to 3,36 mSv/year. The study includes the analysis of the problems and perspectives of the improvement of the system of the data collection on the levels of exposure of the public of the Russian Federation from natural sources.

scholarly journals EXPOSURE OF THE PUBLIC OF THE LENINRGAD REGION DUE TO THE NATURAL SOURCES OF IONIZING RADIATION

2018 ◽  
Vol 11 (2) ◽  
pp. 91-97 ◽  
Author(s):  
O. A. Istorik ◽  
L. A. Eremina ◽  
A. N. Barkovsky ◽  
T. A. Kormanovskaya ◽  
R. R. Akhmatdinov
Keyword(s):  
Ionizing Radiation ◽  
Effective Dose ◽  
Residential Buildings ◽  
Beta Activity ◽  
Leningrad Region ◽  
Volume Activity ◽  
Radiation Dose Rate ◽  
Natural Sources ◽  
The Public ◽  
The Individual

This study is focused on the analysis of the results of the radiation-hygienic passportisation and the Joint state system of control and accounting of the individual doses of the public from natural sources of ionizing radiation in the Leningrad region. The results of the study include data on the number of measurements of the gamma-radiation dose rate in buildings and in open territories, number of measurements of volume activity and equivalent equilibrium volume activity of radon in the air in the public and residential buildings in the Leningrad region in 2007–2016 as well as the number of the assessments of the total volume alpha and beta activity and concentration of the natural occurring radionuclides in drinking water. The authors performed an assessment of the annual individual effective dose per resident of theLeningradregion. It was estimated as 3.09 mSv/year considering all the data in Regional dose databank. Natural sources of ionizing exposure contribute 92.6% to the annual effective dose to the public of the Leningrad region, that exceeds the average Russian values by 6%.

scholarly journals Evaluation of Background Ionizing Radiation Level of Selected Oil Spill Communities of Delta State, Nigeria

2019 ◽  
pp. 1-10
Author(s):  
M. U. Audu ◽  
G. O. Avwiri ◽  
C. P. Ononugbo
Keyword(s):  
Cancer Risk ◽  
Ionizing Radiation ◽  
Effective Dose ◽  
Oil Spill ◽  
Annual Effective Dose ◽  
Absorbed Dose ◽  
Nuclear Radiation ◽  
Lifetime Cancer Risk ◽  
Radiation Level ◽  
Excess Lifetime Cancer Risk

Study of the terrestrial Background Ionizing Radiation levels of selected Oil Spill Communities of Delta State, Nigeria have been carried out using Digilert 200 and Radalert 100 nuclear radiation monitor and a geographical positioning system (Garmin GPSMAP 76S). The exposure rates of the five communities ranges from 0.016 to 0.030  at Jones Creek, 0.014 to 0.034  at Opuwade Community, 0.015 to 0.037   at Okpare community, 0.007 to 0.029  at OtuJeremi community and 0.011to 0.040  at Otor-Edo community. The obtained mean exposures rates were higher than ICRP standard limit of 0.013. The absorbed dose rates calculated ranged from 139.2 to 261 (Jones Creek), 121.8 to 259.8 nGyh-1 (Opuwade Community), 130.5 to 321.9 nGyh-1 (Okpare community), 60.9 to 252.3 nGyh-1 (OtuJeremi community) and 95.9 to 348 nGyh-1 (Otor-Edo community). The estimated annual effective dose equivalent varies from  0.21 to 0.40 , 0.19 to  0.45 , 0.20 to  0.49 , 0.09 to 0.39  and  0.15 to 0.53  for Jones Creek, Opuwade Community, Okpare community, Otu Jeremi community and Otor-Edo community respectively while the excess lifetime cancer risk calculated for Jones Creek varies from (0.75  to 1.40)  x 10-3, Opuwade community (0.65 to 1.59 )×, Okpare community (0.70 to 1.73 ) x , OtuJeremi community (0.33 to 1.35)× and Otor-Edo community (0.51 to 1.87)×. All the mean values of absorbed dose, annual effective dose and excess lifetime cancer risk exceeded their recommended safe values. The results obtained in this work may not constitute any immediate health risk to the residents of the selected oil spill communities but long term exposure in the area may lead to detrimental health risks.

scholarly journals Radioactivity of long-lived gamma emitters in egg

2021 ◽  
Author(s):  
Hamid Ramazanian ◽  
◽  
Tareq Alrefae ◽  
Keyword(s):  
Effective Dose ◽  
High Purity ◽  
Annual Effective Dose ◽  
Germanium Detector ◽  
Natural Sources ◽  
World Average ◽  
High Purity Germanium Detector ◽  
Egg Consumption ◽  
High Purity Germanium ◽  
Radiological Hazards

Radioactivity in egg was investigated. The targeted radionuclides were the long-lived gamma emitters 228Ra, 226Ra, and 40K. Measurements were carried out using a high purity germanium detector. The calculated annual effective dose due to egg consumption was 79 μSv yr-1, which forms 1/4 of the 290 μSv yr-1 world average ingestion exposure from natural sources. Hence, no radiological hazards exist from egg consumption due to the presence of the investigated radionuclides.

scholarly journals Comparative evaluation of average doses of radiation of population of Irkutsk and Voronezh regions according to «Unified state system of control of individual doses»

2021 ◽  
Vol 14 (2) ◽  
pp. 72-78
Author(s):  
V. N. Rakitsky ◽  
M. K. Kuzmichev ◽  
O. V. Klepikov ◽  
G. V. Kurenkova
Keyword(s):  
Ionizing Radiation ◽  
Medical Diagnostics ◽  
State System ◽  
Anthropogenic Sources ◽  
Normal Operation ◽  
Radiation Doses ◽  
Natural Sources ◽  
Irkutsk Region ◽  
Voronezh Region ◽  
Effective Doses

The aim of the study was a comparative assessment of radiation doses to the population of the Voronezh and Irkutsk regions according to the unified state system for monitoring individual doses and radiation-hygienic certification. The objects of research were the territories of the Voronezh and Irkutsk regions, significantly differing in climatic conditions and resources, industrial potential, but comparable in terms of population. The subject of the study was the average territorial values of radiation doses to personnel due to the normal operation of anthropogenic sources, radiation doses to the population due to natural sources and anthropogenic background, radiation doses to patients due to the use of ionizing radiation in medical diagnostics. The method of comparative analysis of effective collective and individual average annual radiation doses was used. In the Voronezh and Irkutsk regions, the priority dose-generating factor is natural radiation, which contribution to the annual effective collective dose is 83.33 and 89.18%, respectively. At the same time, the average individual annual effective doses to the population due to natural sources of ionizing radiation in the Irkutsk region in relation to the Voronezh region are significantly higher for radon – 2,81 times, due to the content of radionuclides in drinking water – 1,93 times and external terrigenous radiation – 1,46 times, which leads to a two-fold difference in the total individual effective doses associated with natural sources of ionizing radiation. These differences are explained by the features of the physical and geographical location of territories. There are significant differences in the values of the average effective annual doses of the population due to global fallouts and past radiation accidents, because a part of the territory of the Voronezh region was exposed to radioactive contamination as a result of the accident at the Chernobyl nuclear power plant (in the Voronezh region – 0.062 mSv / year, in the Irkutsk -0.005 mSv / year). Radiography (63.15 and 67.27%) makes the leading contribution to the value of medical radiation doses, which occupy the second place in the structures of the effective collective annual doses to the population (in the Voronezh region make up 16.46%, in the Irkutsk region – 10.74%) and fluorography (31.29 and 27.41% in the regions, respectively). It was established that the radiation situation in the Voronezh and Irkutsk regions remains stable and safe.

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