Радиационная обстановка на территориях Ленинградской области, пострадавших вследствие аварии на Чернобыльской АЭС

The accident at the Chernobyl nuclear power plant was the largest nuclear accident in the world. It led to radioactive contamination of 14 regions of the Russian Federation. In 1991, 4540 settlements were attributable to areas with levels of soil contamination by 137Cs of more than 1.0 Ci/km2. As of 2016, 3855 settlements with the population of more than 1,5 million people are carried to a zone of radioactive contamination according to the Government Directive No 1074 dated October 8, 2015 «On Approval of the List of settlements located within the boundaries of the zones of radioactive contamination from the Chernobyl disaster». In accordance with this Directive, in the Leningrad region 29 settlements were classified as zones of radioactive contamination. This article describes the dynamics of changes in the radiation situation and its current state in the territories of the Leningrad Region affected by the Chernobyl accident. The paper presents the dynamics of 137Cs and 90Sr contents in food products of local origin, the results of calculations of the current average annual effective doses used for the purposes of settlements’ zoning, and the average annual effective radiation doses actually received by the population, dating back to 1986. According to the results of laboratory studies, since 1987, there have been no exceedances of the permissible levels for 137Cs s in agricultural products and food raw materials of local origin. However in the wild products (mushrooms) excesses of the permissible levels for 137Cs have been periodically detected. The cases of exceeding the permissible levels for the content of strontium-90 in food, drinking water and water from open water bodies were not recorded for the entire observation period; the determined activity was at the level of tens and hundreds of times less than the permissible levels. In 2016, conservatively estimated average annual effective doses of exposure used for the purposes of settlements’ zoning, of residents of settlements in the Leningrad region, referred to the zones of radioactive contamination, do not exceed 0.090 mSv / year. The average annual dose actually received by the population in 2016, does not exceed 0.082 mSv / year. Thus, based on the results of the radiation monitoring, the situation associated with the impact of ionizing radiation sources in the Leningrad Region, formed as a result of the Chernobyl accident, currently is characterized as safe.Авария на Чернобыльской АЭС была самой масштабной из радиационных катастроф в мире. Она привела к радиоактивному загрязнению 14 регионов Российской Федерации. К зоне радиоактивного загрязнения с плотностью более 1,0 Ки/км2 по 137Cs в 1991 г. было отнесено 4540 населенных пунктов. По состоянию на 2016 г. к зоне радиоактивного загрязнения в Российской Федерации по постановлению Правительства Российской Федерации от 08.10.2015 г. № 1074 «Об утверждении Перечня населенных пунктов, находящихся в границах зон радиоактивного загрязнения вследствие катастрофы на Чернобыльской АЭС» отнесено 3855 населенных пунктов с населением более 1,5 млн человек. В соответствии с этим постановлением, в Ленинградской области 29 населенных пунктов отнесены к зонам радиоактивного загрязнения. В настоящей статье описывается динамика изменения радиационной обстановки и ее современное состояние на территориях Ленинградской области, пострадавших вследствие аварии на Чернобыльской АЭС. Приведены данные о динамике содержания 137Cs и 90Sr в пищевых продуктах местного происхождения, результаты расчетов текущих средних годовых эффективных доз, используемых для целей зонирования населенных пунктов, и фактически полученных населением средних годовых эффективных доз облучения, начиная с 1986 г. По результатам лабораторных исследований с 1987 г. превышений допустимых уровней по содержанию цезия-137 в сельскохозяйственной продукции и продовольственном сырье местного производства не выявлено, в дикорастущей продукции (грибах) периодически обнаруживались превышения допустимых уровней по цезию-137. Случаев превышения допустимых уровней по содержанию стронция-90 в пищевых продуктах, воде питьевой и воде из открытых водоемов не регистрировалось за весь период наблюдений, определяемая активность находилась на уровне в десятки и сотни раз меньше допустимых уровней. Консервативно оцениваемые средние годовые эффективные дозы облучения, используемые для целей зонирования населенных пунктов, в 2016 г. у жителей населенных пунктов Ленинградской области, отнесенных к зонам радиоактивного загрязнения, не превышают 0,090 мЗв/год. Фактически полученные населением в 2016 г. средние годовые эффективные дозы облучения вследствие аварии на Чернобыльской АЭС не превышают 0,082 мЗв/год. Таким образом, по результатам мониторинга радиационной обстановки, ситуация, связанная с воздействием источников ионизирующего излучения в Ленинградской области, образовавшихся вследствие аварии на Чернобыльской АЭС, в настоящее время характеризуется как безопасная

СРЕДНИЕ ГОДОВЫЕ ЭФФЕКТИВНЫЕ ДОЗЫ ОБЛУЧЕНИЯ В 2017 ГОДУ ЖИТЕЛЕЙ НАСЕЛЕННЫХ ПУНКТОВ РОССИЙСКОЙ ФЕДЕРАЦИИ, ОТНЕСЕННЫХ К ЗОНАМ РАДИОАКТИВНОГО ЗАГРЯЗНЕНИЯ ВСЛЕДСТВИЕ КАТАСТРОФЫ НА ЧЕРНОБЫЛЬСКОЙ АЭС (ДЛЯ ЦЕЛЕЙ ЗОНИРОВАНИЯ НАСЕЛЕННЫХ ПУНКТОВ)

The Chernobyl accident in 1986 is one of the most large-scale radiation accidents in the world. It led to radioactive contamination of large areas in the European part of the Russian Federation and at the neighboring countries. Now, there are more than 4000 settlements with the total population of 1.5 million in the radioactively contaminated areas of the Russian Federation. The Bryansk region is the most intensely contaminated region. For example, the Krasnogorskiy district still has settlements with the level of soil contamination by cesium-137 exceeding 40 Ci/km2. The regions of Tula, Kaluga and Orel are also significantly affected. In addition to these four regions, there are ten more regions with the radioactively contaminated settlements. After the Chernobyl accident, the affected areas were divided into zones of radioactive contamination. The attribution of the settlements to a particular zone is determined by the level of soil contamination with 137Cs and by a value of the average annual effective dose that could be formed in the absence of: 1) active measures for radiation protection, and 2) self-limitation in consumption of the local food products. The main regulatory document on this issue is the Federal law № 1244-1 (dated May, 15 1991) “On the social protection of the citizens who have been exposed to radiation as a result of the accident at the Chernobyl nuclear power plant”. The law extends to the territories, where, since 1991: 1) the average annual effective dose for the population exceeds 1 mSv (the value of effective dose that could be formed in the absence of active radiation protection measures and self-limitation in consumption of the local food products); 2) soil surface contamination with cesium-137 exceeds 1 Ci/km2.The paper presents results of calculations of the average effective doses in 2017. The purpose was to use the dose values (SGED90) in zonation of contaminated territories. Therefore, the calculations have been done under the assumption that the doses were formed in the absence of active radiation protection measures and self-limitation in consumption of the local food products. The dose to population, rather than the density of radioactive contamination of soil by 137Cs, is the most objective characteristic of the actual radiation exposure to the residents of the contaminated areas.Одна из самых масштабных радиационных катастроф в мире – авария на Чернобыльской АЭС в 1986 г. – привела к радиоактивному загрязнению значительных территорий европейской части Российской Федерации и сопредельных государств. В настоящее время в зонах радиоактивного загрязнения в 14 субъектах Российской Федерации находится 3855 населенных пунктов, где проживают более 1,5 млн человек. Наиболее интенсивно загрязнена Брянская область: так, в Красногорском районе до сих пор есть населенные пункты с радиоактивным загрязнением почвы цезием-137 выше 50 Ки/км2. Значительно пострадали также Тульская, Калужская и Орловская области. Кроме этих четырех областей, еще в 10 регионах страны имеются населенные пункты, расположенные в зонах радиоактивного загрязнения. После аварии на ЧАЭС пострадавшие территории были разбиты на зоны радиоактивного загрязнения. Отнесение НП к той или иной зоне определяется уровнем загрязнения почвы 137Cs и величиной средней годовой эффективной дозы облучения, которую могли бы получить жители в условиях отсутствия активных мер радиационной защиты и самоограничений в потреблении местных пищевых продуктов. Основным нормативным документом по данному вопросу является Федеральный закон от 15 мая 1991 г. № 1244-1 «О социальной защите граждан, подвергшихся воздействию радиации вследствие катастрофы на Чернобыльской АЭС», распространяющийся на территории, на которых, начиная с 1991 г.:1) средняя годовая эффективная доза облучения населения превышает 1 мЗв/год – доза, которую могли бы получить жители в условиях отсутствия активных мер радиационной защиты и самоограничений в потреблении местных пищевых продуктов; 2) плотность радиоактивного загрязнения почвы цезием-137 превышает 1 Ки/км2.В статье приведены результаты расчетов средних годовых эффективных доз облучения населения в предполагаемых условиях отсутствия активных мер радиационной защиты, предназначенные для целей зонирования населенных пунктов (СГЭД90). Как известно, наиболее объективным качественным и количественным показателем оценки реального радиационного воздействия на жителей загрязненных территорий является доза облучения населения, а не плотность радиоактивного загрязнения почвы

Результаты современных радиационно-гигиенических обследований приграничных с Республикой Беларусь населенных пунктов Брянской области Российской Федерации. Часть 1: Характеристика населенных пунктов

This study presents results of radiation-hygienic surveys of the Bryansk Oblast settlements bordering the Republic of Belarus. The data were obtained in the course of implementation of measures of the “Program of joint activities of Russia and Belarus within the framework of the Union State for the protection of the population and rehabilitation of the territories affected by the Chernobyl NPP accident” in 2019–2022. The first part of the study presents a general characteristic of the current state of the problem of returning the residents of radioactively contaminated territories to normal living conditions and provides information on the settlements of the surveyed region. The modern demographic composition of the population is considered; the structure of private subsidiary plots is investigated. The results described in this part of the study indicate the main ways, which are relevant for the formation of the internal exposure dose of the public at the current stage of the radiation accident.В статье приводятся результаты радиационно-гигиенических обследований приграничных с Республикой Беларусь населенных пунктов Брянской области, полученные в 2019–2022 гг. в ходе реализации мероприятий «Программы совместной деятельности России и Беларуси в рамках Союзного государства по защите населения и реабилитации территорий, пострадавших в результате катастрофы на Чернобыльской АЭС». В первой части статьи дана общая характеристика современного состояния проблемы возвращения жителей радиоактивно загрязненных территорий к условиям нормальной жизнедеятельности и приводятся сведения о населенных пунктах обследованного региона. Рассмотрен современный демографический состав населения, исследована структура личных подсобных хозяйств. На основании результатов, описанных в данной части публикации, выделены основные пути формирования дозы внутреннего облучения населения, актуальные для современного этапа радиационной аварии

Trends of development and prediction of the doses from the internal exposure of the public of the Russian Federation and its critical groups in the distant post-Chernobyl NPP accident period

An article is devoted to the peculiarities of exposure doses forming of adult population due to the main dose-forming foodstuffs in the remote period after Chernobyl accident. On an example of the Bryansk and Tula regions, we carried out the assessment of the effective purification half-periods of the main dose-forming food products (milk and mushrooms) from 137Cs due to its radioactive decay and natural self-purification and the assessment of the periods of half-reduction of the average annual effective internal doses for the population of the Bryansk region divided on the 137Cs soil surface activity actual in the corresponding year (based on whole body measurements data). Obtained results allowed fulfilling the prognosis of the internal doses for the population of the Bryansk region for the time period up to 2056

Radiation situation on the territories of the Leningrad Region affected by the Chernobyl accident

The accident at the Chernobyl nuclear power plant was the largest nuclear accident in the world. It led to radioactive contamination of 14 regions of the Russian Federation. In 1991, 4540 settlements were attributable to areas with levels of soil contamination by 137Cs of more than 1.0 Ci/km2. As of 2016, 3855 settlements with the population of more than 1,5 million people are carried to a zone of radioactive contamination according to the Government Directive No 1074 dated October 8, 2015 «On Approval of the List of settlements located within the boundaries of the zones of radioactive contamination from the Chernobyl disaster». In accordance with this Directive, in the Leningrad region 29 settlements were classified as zones of radioactive contamination. This article describes the dynamics of changes in the radiation situation and its current state in the territories of the Leningrad Region affected by the Chernobyl accident. The paper presents the dynamics of 137Cs and 90Sr contents in food products of local origin, the results of calculations of the current average annual effective doses used for the purposes of settlements’ zoning, and the average annual effective radiation doses actually received by the population, dating back to 1986. According to the results of laboratory studies, since 1987, there have been no exceedances of the permissible levels for 137Cs s in agricultural products and food raw materials of local origin. However in the wild products (mushrooms) excesses of the permissible levels for 137Cs have been periodically detected. The cases of exceeding the permissible levels for the content of strontium-90 in food, drinking water and water from open water bodies were not recorded for the entire observation period; the determined activity was at the level of tens and hundreds of times less than the permissible levels. In 2016, conservatively estimated average annual effective doses of exposure used for the purposes of settlements’ zoning, of residents of settlements in the Leningrad region, referred to the zones of radioactive contamination, do not exceed 0.090 mSv / year. The average annual dose actually received by the population in 2016, does not exceed 0.082 mSv / year. Thus, based on the results of the radiation monitoring, the situation associated with the impact of ionizing radiation sources in the Leningrad Region, formed as a result of the Chernobyl accident, currently is characterized as safe

Закономерности формирования и прогноз доз внутреннего облучения населения Российской Федерации и его критических групп в отдаленный период после аварии на Чернобыльской АЭС

An article is devoted to the peculiarities of exposure doses forming of adult population due to the main dose-forming foodstuffs in the remote period after Chernobyl accident. On an example of the Bryansk and Tula regions, we carried out the assessment of the effective purification half-periods of the main dose-forming food products (milk and mushrooms) from 137Cs due to its radioactive decay and natural self-purification and the assessment of the periods of half-reduction of the average annual effective internal doses for the population of the Bryansk region divided on the 137Cs soil surface activity actual in the corresponding year (based on whole body measurements data). Obtained results allowed fulfilling the prognosis of the internal doses for the population of the Bryansk region for the time period up to 2056.Статья посвящена закономерностям формирования доз внутреннего облучения взрослого населения за счет потребления основных дозообразующих пищевых продуктов в отдаленный период после аварии на Чернобыльской АЭС. На примере Брянской и Тульской областей выполнена оценка эффективных периодов полуочищения основных дозообразующих пищевых продуктов (молока и грибов) от 137Cs, а также периодов полуснижения средних годовых эффективных доз внутреннего облучения, нормированных на плотность загрязнения почвы 137Cs в соответствующий год (по данным СИЧ-измерений). Полученные результаты позволили выполнить прогноз доз облучения населения 14 субъектов Российской Федерации на период до 2056 г

THE AVERAGE ANNUAL EFFECTIVE DOSES FOR THE POPULATION OF THE SETTLEMENTS OF THE RUSSIAN FEDERATION ATTRIBUTED TO ZONES OF RADIOACTIVE CONTAMINATION DUE TO THE CHERNOBYL ACCIDENT (FOR THE ZONATION PURPOSES), 2017

The Chernobyl accident in 1986 is one of the most large-scale radiation accidents in the world. It led to radioactive contamination of large areas in the European part of the Russian Federation and at the neighboring countries. Now, there are more than 4000 settlements with the total population of 1.5 million in the radioactively contaminated areas of the Russian Federation. The Bryansk region is the most intensely contaminated region. For example, the Krasnogorskiy district still has settlements with the level of soil contamination by cesium-137 exceeding 40 Ci/km2. The regions of Tula, Kaluga and Orel are also significantly affected. In addition to these four regions, there are ten more regions with the radioactively contaminated settlements. After the Chernobyl accident, the affected areas were divided into zones of radioactive contamination. The attribution of the settlements to a particular zone is determined by the level of soil contamination with 137Cs and by a value of the average annual effective dose that could be formed in the absence of: 1) active measures for radiation protection, and 2) self-limitation in consumption of the local food products. The main regulatory document on this issue is the Federal law № 1244-1 (dated May, 15 1991) “On the social protection of the citizens who have been exposed to radiation as a result of the accident at the Chernobyl nuclear power plant”. The law extends to the territories, where, since 1991: 1) the average annual effective dose for the population exceeds 1 mSv (the value of effective dose that could be formed in the absence of active radiation protection measures and self-limitation in consumption of the local food products); 2) soil surface contamination with cesium-137 exceeds 1 Ci/km2.The paper presents results of calculations of the average effective doses in 2017. The purpose was to use the dose values (SGED90) in zonation of contaminated territories. Therefore, the calculations have been done under the assumption that the doses were formed in the absence of active radiation protection measures and self-limitation in consumption of the local food products. The dose to population, rather than the density of radioactive contamination of soil by 137Cs, is the most objective characteristic of the actual radiation exposure to the residents of the contaminated areas

The average accumulated effective doses (1986-2016) for the population of the settlements of the Russian Federation attributed to the zones of radioactive contamination according to the Russian Federation government resolution «on the approval of the ...

The Chernobyl accident in 1986 being one of the most large-scale radiation accidents in the world led to radioactive contamination of large areas in the European part of the Russian Federation and at the neighboring countries. Nowadays, there are adout 4000 settlements with the total population of more than 1.5 million in the radioactively contaminated areas of the Russian Federation. The Bryansk region is the most intensely contaminated region: thus, in the Krasnogorskiy district, there are still settlements with the level of soil contamination with cesium-137 exceeding 40 Ci/km2. Tula, Kaluga and Orel regions are also significantly affected. In addition to these four regions, there are ten other regions with the settlements located in the zones of radioactive contamination. After the Chernobyl accident, the affected areas have been divided into the zones of radioactive contamination. Belonging of the settlements to the one or another zone is determined by level of soil contamination with 137Cs and by value of the average annual effective dose that could be formed in the conditions of the absence of active measures of radiation protection and self-limitation with respect of the consumption of the local food products. The paper presents results of calculations of the average accumulated effective doses for the population. It is known that the most objective qualitative and quantitative index of the estimation of the actual radiation influence on the population of contaminated territories is the accumulated dose to population. In contrast to average annual effective exposure dose, which is estimated based on certain assumptions, the value of average accumulated dose is based on the doses which were actually received by inhabitants