scholarly journals Investigation of gamma background in parks and recreation areas of the city of Petropavlovsk-Kamchatsky

2021 ◽  
pp. 183-202
Author(s):  
З.И. Сидоров ◽  
Р.И. Паровик ◽  
А.В. Вуколов ◽  
В.С. Яковлева
Keyword(s):  
Gamma Radiation ◽  
Urban Environment ◽  
Absorbed Dose ◽  
Point Sources ◽  
Absorbed Dose Rate ◽  
Natural Sources ◽  
Parks And Recreation ◽  
Gamma Background ◽  
Recreation Areas ◽  
The City

Работа посвящена исследованию гамма-фона в городской среде Петропавловска-Камчатского (Камчатский край), а именно в парках и зонах отдыха. Измерения мощности поглощенной дозы проводились на разработанном коллективном Томского политехнического университета (ТПУ) дозиметре с использованием органического сцинтиллятора ВС-408, который является схожим по техническим характеристикам с БДКГ-01. С целью вычисления поправочного коэффициента для перевода показаний дозиметра из имп/с в нЗв/ч был проведен ряд калибровочных измерений с точечными источниками гамма-излучения – 60Co и 137Cs. Разработанным дозиметром проводились измерения длительностью не менее 5 минут в различных районах города Петропавловска-Камчатского, особое внимание уделялось исследованию объектов техносферы из материалов, являющимися природными источниками повышенного гамма-излучения. Исследования показали, что памятник В. И. Ленину и стела «Город воинской славы» в центре города Петропавловска-Камчатского содержат граниты у их основания, которые дают завышенный гамма-фон The work is devoted to the study of the gamma background in the urban environment of Petropavlovsk-Kamchatsky (Kamchatka Territory), namely in parks and recreation areas. Measurements of the absorbed dose rate were carried out on a scintillation organic dosimeter developed by the team of the Tomsk Polytechnic University (TPU), which is a more budgetary analogue of the BDKG-01. In order to calculate the correction factor for converting the dosimeter readings from impulses/s to nSv/h, a number of calibration measurements were carried out with point sources of gamma radiation – 60Co and 137 Cs. The developed dosimeter carried out measurements with a duration of at least 5 minutes in various districts of the city of Petropavlovsk-Kamchatsky, special attention was paid to the study of technosphere objects made of materials that are natural sources of increased gamma radiation. Studies have shown that the monument to V. I. Lenin and the stele « City of Military Glory » in the center of the city of Petropavlovsk-Kamchatsky contain granites at their base, which give an overestimated gamma background.

scholarly journals High Terrestrial Radiation Level in an Active Tin-Mine at Jos South, Nigeria

2020 ◽  
Vol 24 (3) ◽  
pp. 435-442 ◽  
Author(s):  
M. Atipo ◽  
O. Olarinoye ◽  
B. Awojoyogbe ◽  
M. Kolo
Keyword(s):  
Gamma Radiation ◽  
Dose Rate ◽  
Technological Development ◽  
Absorbed Dose ◽  
Ground Level ◽  
Absorbed Dose Rate ◽  
Lifetime Cancer Risk ◽  
Radiation Level ◽  
Background Gamma Radiation ◽  
The Mean

Mineral mining and milling can be a source of national economic and technological development. However, mining of minerals has been confirmed to disturb the natural distribution of radioisotopes in the soil, air and water bodies in the biota. In an attempt to evaluate the radiological burden resulting from tin mining activities at Rayfield-Du area of Jos, the background gamma-radiation level in the mine was measured via a well calibratedhand-held dosimeter placed at 1 m above ground level. The mean absorbed dose rate, annual effective dose rate and excess lifetime cancer risk for the mine was 0.83 μSvh-1; 1.44 mSv-1 and 0.005 respectively. Generally, dose rates were higher in the mine pits and processing areas as compared to administrative areas of the mine. The mean measured dose rate and calculated dose parameters for the mine were all high when compared to the regulatory limit for public exposure. The potential of developing radiation-induced health defects as a result of high radiation absorbed dose rate by the miners and dwellers around the mine is highly probable.  Keywords: Gamma-radiation; mine; absorbed dose rate; radiation exposure.

CAR-BORNE SURVEY OF NATURAL BACKGROUND GAMMA RADIATION IN WESTERN, EASTERN AND SOUTHERN THAILAND

2019 ◽  
Vol 188 (2) ◽  
pp. 174-180
Author(s):  
Chutima Kranrod ◽  
Supitcha Chanyotha ◽  
Phongphaegh Pengvanich ◽  
Rawiwan Kritsananuwat ◽  
Thamaborn Ploykrathok ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Dose Rate ◽  
Pulse Height ◽  
Absorbed Dose ◽  
Height Distribution ◽  
Natural Background ◽  
Large Area ◽  
Absorbed Dose Rate ◽  
Pulse Height Distribution ◽  
Background Gamma Radiation

Abstract Natural background gamma radiation was measured along the main roads in the eastern, western and southern regions of Thailand using a car-borne survey system with a 3-in × 3-in NaI (Tl) scintillation spectrometer. The system was able to quickly survey a large area and obtain outdoor absorbed dose rate in air from a gamma ray pulse height distribution. A total of 19 219 data of the outdoor absorbed dose rate in air were collected. The average outdoor absorbed dose rate in air in the eastern, western and southern regions were found to be 8–127, 16–119 and 16–141 nGy h -1 , respectively. The highest outdoor absorbed dose rate in air was detected in the southern region of Thailand. The corresponding average outdoor annual effective dose to the public ranged from 11.7 to 80.8 μSv.

scholarly journals Sociological aspects of improving the contaminated territories of Saratov

2021 ◽  
Vol 21 (2) ◽  
pp. 167-171
Author(s):  
Marina V. Kalinnikova ◽  
◽  
Irina N. Sosina ◽  
Keyword(s):  
Urban Development ◽  
Social Life ◽  
Environmental Problems ◽  
Parks And Recreation ◽  
Recreation Areas ◽  
Land Disputes ◽  
History Of ◽  
Entire History ◽  
Sociological Studies ◽  
The City

The article discusses the problems of urban development of the contaminated territories of Saratov aimed at improving this territory. Particular attention is paid to the substantiation and necessity of using in sociological studies of a modern city such a concept as a socio-territorial community, which is interpreted as a form of social life, where a certain set of individuals has the same type of relationship to a specific territory. Glebutchev ravine was chosen as a contagious model polygon. Throughout almost the entire history of the city, the contaminated areas have been a zone of uncomfortable living attracting the poorest segments of the city’s residents. Urban development of these territories is associated with a number of social and environmental problems, for example, with the need for mass resettlement, demolition of illegal buildings, settlement of land disputes, etc. In the course of analyzing the materials of the author’s sociological survey of macrophotography, the bulk of the residents (65%) note the need of improving the ravine. At the same time, 30% of respondents want to improve living conditions by building a shopping and entertainment center, 45% want to see only pedestrian and transport accessibility and 35% believe that the creation of parks and recreation areas is necessary.

scholarly journals Assessment of Gamma Radiation 232Th, 226Ra and 40K in Nassarawa, Nigeria

2020 ◽  
pp. 1-10
Author(s):  
U. Rilwan ◽  
I. Umar ◽  
A. Z. Ngari ◽  
H. A. Abdullahi ◽  
H. O. Aboh
Keyword(s):  
Gamma Radiation ◽  
Dose Rate ◽  
Absorbed Dose ◽  
Soil Samples ◽  
High Radiation ◽  
Hazard Indices ◽  
Absorbed Dose Rate ◽  
The Mean ◽  
Low Exposure ◽  
Mean Concentration

This study assessed gamma radiation from 232Th, 226Ra and 40K. Twelve soil samples collected from the study area were analyzed using Nal (TI) detector. Mean concentration for 40K, 232Th and 226Ra were found to be 483.97±7.32 Bq/kg, 28.43±5.30 Bq/kgS and 66.84±2.02 Bq/kg respectively. Absorbed Dose Rate ranged from 44.85 nGy/h to 90.71 nGy/h with a mean of 73.68 nGy/h. Effective Dose Rate ranged from 0.055 to 0.111 msv/yr with a mean of 0.090 mSv/y. The Internal and External Hazard Indices ranged from 0.271 to 0.533 Bq/kg with the mean of 0.435 Bq/kg and 0.289 to 0.675 Bq/kg with the mean of 0.512 Bq/kg respectively. It can thus be concluded that the radiation dose of the study area is minimal and seems to have low exposure for the inhabitants in and around the contaminated areas. It is therefore recommended that regular radiation monitoring exercises should be conducted on the processing sites to prevent the inhabitants of the area from high radiation exposure due to direct inhalation of finely divided particulates and dust comprised of the above-mentioned radionuclides.

Certification of a specialized source of gamma radiation spatially combined with modeling reference field of neutron radiation

2021 ◽  
pp. 53-57
Author(s):  
Alexander A. Gromov ◽  
Alexander P. Zhanzhora ◽  
Vladimir F. Shikalov
Keyword(s):  
Gamma Radiation ◽  
Dose Rate ◽  
Nuclear Reactor ◽  
Absorbed Dose ◽  
Neutron Radiation ◽  
Reactor Power ◽  
Measuring Instruments ◽  
Reference Field ◽  
Absorbed Dose Rate ◽  
Experimental Channel

The results of metrological studies of the field of the experimental channel of the research nuclear reactor OR (experimental base of the NRC “Kurchatov Institute”) with a capacity of 0.1–300 kW are presented. The empirical dependence of the contribution of the absorbed dose of gamma radiation during the raising and lowering reactor power in the total absorbed dose during the irradiation in the reactor and absorbed dose rate from a power reactor OR in the steady state. Based on these results, the absorbed dose and absorbed dose rate of gamma radiation can be pre-calculated. According to metrological studies results, the experimental channel of the reactor OR was certified in terms of the absorbed dose rate of gamma radiation as a specialized source of gamma radiation spatially combined with the modeling reference field of neutrons. The specialized source is designed for calibration of special-purpose measuring instruments and testing for radiation resistance of products operating in conditions of mixed gamma-neutron radiation of nuclear reactors.

Natural gamma radiation in La Palma Island, Canary Islands, Spain

2020 ◽  
Author(s):  
María López-Pérez ◽  
Pedro Ángel Salazar-Carballo ◽  
M. Candelaría Martín-Luis ◽  
José Miguel Lorenzo-Salazar ◽  
Xiomara Duarte-Rodríguez ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Dose Rate ◽  
Canary Islands ◽  
Absorbed Dose ◽  
Absorbed Dose Rate ◽  
Dose Rates ◽  
La Palma ◽  
Natural Gamma ◽  
Gamma Absorbed Dose ◽  
Cumbre Vieja

<p>The Canary Islands are an archipelago with an area of 7,447 km<sup>2</sup> comprising seven main islands and some islets, located about 90 km off the northwest coast of Africa. La Palma is the most active volcanic island of the Canarian archipelago in historical times (after XV Century), with an area of 706 km<sup>2</sup> and about 83,000 inhabitants. From the geochemical point of view, La Palma is characterized by alkaline rocks ranging from basanites and alkali picrites to phonolites. Despite the different geological units essentially overlap in their bulk chemical compositions, there are significant differences.</p><p>Measurements of natural gamma radiation were carried out in 71 sites randomly selected on a predefined 3x3 km sampling grid covering the whole island in 2013. Total outdoor gamma radiation levels were measured at 1 m above the ground. Air gamma radiation was measured by means of a MINI 6-80 (Mini-Instruments) monitor equipped with an energy-compensated Geiger-Müller MC-71 probe and FH 40 GL 10 (ThermoFischer Scientific) dosimeter equipped with a proportional-gas detector. The background radiation was calculated for each sampling site and subtracted for each dose measurement. Additionally, 25 soil samples were collected at a depth of 0-15 cm in uncultivated fields. Radiometric measurements for <sup>40</sup>K, <sup>226</sup>Ra and <sup>232</sup>Th radioisotopes were performed by low-level gamma spectrometry with coaxial-type germanium detectors (Canberra Industries Inc., USA).</p><p>The gamma absorbed dose rates showed a log-normal distribution, ranging from 37.2 up to 134.0 nGy·h<sup>-1</sup>, with a geometric mean of 64.5 nGy·h<sup>-1</sup>. The observed mean gamma absorbed dose rate in La Palma Island was higher than those measured in La Gomera Island (43.9 nGy·h<sup>-1</sup>), and lower than those measured in Tenerife (89.2 nGy·h<sup>-1</sup>) and El Hierro islands (93.3 nGy·h<sup>-1</sup>) (publication in preparation). The geometric means of <sup>40</sup>K, <sup>226</sup>Ra and <sup>232</sup>Th activity concentration were 216.1 Bq·Kg<sup>-1</sup>, 22.0 Bq·Kg<sup>-1</sup> and 23.6 Bq·Kg<sup>-1</sup>, respectively.</p><p>Maps with the spatial distribution of the terrestrial natural gamma radiation and <sup>40</sup>K, <sup>226</sup>Ra and <sup>232</sup>Th radioisotopes were also prepared and compared with the geochemical composition of soils. Contour maps for the terrestrial radiation component of the absorbed dose rate and radioisotope distributions were obtained using ordinary Kriging interpolation. Lower absorbed dose rates (between 45 and 70 nGy h<sup>-1</sup>) were observed in the oldest northern part of the island, corresponding to the Taburiente and Garafía basaltic shields. Two anomalies were found with absorbed dose rate values between 80 and 110 nGy h<sup>-1</sup>. The first one is located at the Bejenado stratovolcano, extending north to the Caldera de Taburiente, and south to the Aridane Valley. The second anomaly was found in the southeastern part of the Cumbre Vieja ridge. This last volcanic edifice corresponds to the youngest part of the island, where several historical eruptions have occurred. These anomalies might be related to phonotrephritic and phonolitic rocks identified at the upper part of the Bejenado sequence and Cumbre Vieja edifice.</p><p> </p>

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