Spatial distribution of natural and artificial radioactivity concentrations in soil samples and statistical approach, Nevşehir, Turkey

2020 ◽  
Vol 108 (11) ◽  
pp. 913-921
Author(s):  
Nesli Bingöldağ ◽  
Pelin Otansev
Keyword(s):  
Dose Rate ◽  
Mean Value ◽  
Soil Samples ◽  
Gamma Dose ◽  
Gamma Dose Rate ◽  
Gamma Activity ◽  
Dose Rates ◽  
Gamma Dose Rates ◽  
Activity Concentrations ◽  
The Mean

AbstractThe concentrations of 226Ra, 232Th, 40K and 137Cs radionuclides in soil samples collected from 323 different regions of Nevşehir province were determined by using a gamma spectrometer with an HPGe detector. The mean gamma activity concentrations (ranges) of 226Ra, 232Th, 40K and 137Cs for districts were determined as 49.45 (7.40–193.90), 54.08 (<2.8–122.50), 698.43 (37.67–1370.20) and 8.26 (0.10–52.60) Bq kg−1, respectively. The mean activity concentrations of 226Ra, 232Th and 40K were higher than the world mean value. According to Kolmogorov–Smirnov test, distributions of 226Ra, 232Th and 137Cs show log-normal distributions. Whereas, 40K shows normal distribution. The mean radium equivalent activity was 181.68 Bq kg−1 which is lower than the recommended maximum value of 370 Bq kg−1. The mean external terrestrial gamma dose rate was found to be 85.12 nGy h−1. The calculated external hazard value was 0.49 and within the acceptable limit which is less than unity (Hex ≤ 1). Thermo Scientific RadEye NBR detector was used to determine environmental gamma dose rates. The gamma dose rates were measured at 445 points at a height of 1 m from land surface. The mean outdoor gamma dose rate (range) was found as 150.13 (50–480) nGy h−1. This mean value was found higher than world mean value. The fact that most of the Nevşehir province is based on volcanic rocks explains why the gamma dose rates are high.

ELEVATION OF GAMMA DOSE RATE BY CONSTRUCTION OF THE ASIAN HIGHWAY 3 (AH3) BETWEEN ULAANBAATAR AND SAINSHAND, MONGOLIA

2018 ◽  
Vol 184 (1) ◽  
pp. 127-134 ◽  
Author(s):  
Yasutaka Omori ◽  
Atsuyuki Sorimachi ◽  
Manlaijav Gun-Aajav ◽  
Nyamdavaa Enkhgerel ◽  
Galnemekh Oyunbolor ◽  
...  
Keyword(s):  
Dose Rate ◽  
Gamma Ray ◽  
Natural Radionuclides ◽  
Pulse Height ◽  
Gamma Dose ◽  
Gamma Dose Rate ◽  
Radiation Level ◽  
Dose Rates ◽  
Gamma Dose Rates ◽  
Road Materials

Abstract The present study aimed at examining changes of gamma radiation level associated with road construction in Mongolia. A car-borne survey of gamma dose rate was made for a paved, ~450-km long part of the Asian Highway 3 between Ulaanbaatar and Sainshand. The gamma dose rates ranged from 48 to 173 nGy/h. Elevation of the gamma dose rates was observed only on a 86-km long segment of the survey route which was newly constructed from 2011 to 2013. The gamma dose rates over the newer paved segment were twice as high as those over the bare dirt surface alongside it. Outdoor measurements of gamma-ray pulse height distributions also indicated an abundance of natural radionuclides, especially 232Th-series elements in road materials. These findings suggest that the gamma dose rates were elevated by introduction of road materials containing large amounts of natural radionuclides.

REDUCTION IN AMBIENT GAMMA DOSE RATE FROM RADIOCESIUM DUE TO SNOW COVER

2019 ◽  
Vol 184 (3-4) ◽  
pp. 510-513
Author(s):  
Y Omori ◽  
S Inoue ◽  
T Otsuka ◽  
Y Nagamatsu ◽  
A Sorimachi ◽  
...  
Keyword(s):  
Snow Cover ◽  
Dose Rate ◽  
Gamma Rays ◽  
Snow Water Equivalent ◽  
Gamma Dose ◽  
Gamma Dose Rate ◽  
Dose Rates ◽  
Gamma Dose Rates ◽  
Snow Water ◽  
Ambient Gamma Dose Rate

Abstract In the present study, variations in ambient gamma dose rate associated with snow cover were examined in a radioactive-contaminated site in Fukushima Prefecture, Japan. The ambient gamma dose rates decreased with increasing snow depth. The reduction trends were different between fresh snow (0.1–0.2 g/cm3) and granular snow (0.3–0.4 g/cm3) depending on snow density. Snow cover water content (snow water equivalent) calculated from snow depth and density was a key parameter governing the reduction in the ambient gamma dose rate. The ambient gamma dose rates reduced to 0.6 and 0.5 at 4 g/cm2 and 8 g/cm2 of snow water equivalent, respectively. Based on gamma-ray flux density distributions, the ambient gamma dose rates from the primary gamma rays decreased more compared to those from scattered gamma rays due to snow cover.

Radon concentration in water, soil and sediment of Hemavathi River environments

2017 ◽  
Vol 27 (5) ◽  
pp. 587-596 ◽  
Author(s):  
Kaliprasad C. Shivanandappa ◽  
Narayana Yerol
Keyword(s):  
Dose Rate ◽  
Radon Concentration ◽  
Mean Value ◽  
Gamma Dose ◽  
Gamma Dose Rate ◽  
Average Value ◽  
Effective Doses ◽  
The Mean ◽  
Radon In Water ◽  
Soil And Sediment

The present paper discusses the systematic study on gamma dose rate, radon exhalation, radium content in soil and sediment and radon concentration in water of Hemavathi River environments. The Gamma dose rate in the air in the study area varied from 98 to 202 nGy h−1 with mean value 145 nGy h−1. The measured dose rate was above the world and Indian average. The mean value of radium activity in soil and sediment was found to be 366.61 and 328.36 mBq kg−1, respectively. The mean value of radon in soil and sediment was found to be 373.90 and 334.90 Bq m−3, respectively. The radon concentration of water ranges from 0.20 to 1.60 kBq m−3 with an average value of 0.67 kBq m−3. The radon in water contributes to dosage in stomach and lungs. The effective doses of radon were calculated and compared with international recommended values. The results show that sediment and water are safe to use for construction and drinking purpose.

scholarly journals A COMPARATIVE STUDY OF TERRESTRIAL GAMMA DOSE RATE IN AIR MEASURED BY DIFFERENT PORTABLE SURVEY METERS AROUND THE PETROLEUM-PRODUCING AREAS OF THE-QAR PROVINCE, IRAQ

2021 ◽  
Vol 9 (01) ◽  
pp. 1171-1176
Author(s):  
Karwan F. Majeed ◽  
◽  
Yousif M. Zayir Al-Bakhat ◽  
Keyword(s):  
Dose Rate ◽  
Spectroscopic Analysis ◽  
Oil And Gas ◽  
Gas Production ◽  
Soil Samples ◽  
Gamma Dose ◽  
Gamma Dose Rate ◽  
Oil And Gas Production ◽  
Dose Rates ◽  
Calculated Dose

Two different survey-meters are used to measure the gamma dose rate inthe area of oil and gas production of the Thi-Qar province, southeast of Iraq. The obtained results are compared with those previously obtained by the gamma spectroscopic analysis of collected soil samples from the same study regions.The obtained dose rate by using RadEye (PRD) survey-meter was ranged (0.06-0.19)nGyh-1, while those by using Ludlum survey meter were ranged(10.23-33.48) nGyh-1. Gamma spectroscopic analysis of the collected samples showed that the calculated dose rate is ranged(14.77-38.78) nGyh-1which is higher than those obtained by RadEye (PRD) survey-meter and comparable with those obtained byLudlum survey meter. Using the gamma survey meters to determine the dose rates inside these regions cannot be trustedand the long methodology of the gamma spectroscopic analysis of the collected samples is highly required.

ASSESSMENT OF RADON AND THORON EXHALATION FROM SOILS AND DISSOLVED RADON IN GROUND WATER IN THE VICINITY OF ELEVATED GRANITIC HILL, CHIKKABALLAPUR DISTRICT, KARNATAKA, INDIA

2020 ◽  
Vol 190 (2) ◽  
pp. 185-192
Author(s):  
C G Poojitha ◽  
B K Sahoo ◽  
K E Ganesh ◽  
T S Pranesha ◽  
B K Sapra
Keyword(s):  
Ground Water ◽  
Dose Rate ◽  
Detailed Analysis ◽  
Physicochemical Parameters ◽  
Soil Samples ◽  
Gamma Dose ◽  
Gamma Dose Rate ◽  
Exhalation Rate ◽  
Groundwater Samples ◽  
Activity Measurements

Abstract In this paper, we intend to evaluate the rate of radon and thoron exhalation from soil with reference to the underlying bedrock and gamma dose rate in the environment of elevated granitic hill—Nandi hills of Karnataka. The measurement of exhalation rates for all the soil samples collected from study area was carried out using a continuous radon–thoron monitor (Smart RnDuo monitor). The surface exhalation rate of thoron from soil samples were found to vary from 4160 ± 326 to 21 822 ± 634 mBq m−2 s−1. The mass exhalation rate of radon from soil samples were found to vary from 76 ± 6 to 269 ± 19 mBq kg−1 h−1. Concentrations of radon activity measurements were carried out for all the groundwater samples from study area. A detailed analysis along with physicochemical parameters of water has been made and discussed in this research paper.

scholarly journals Field gamma spectrometry, Monte Carlo simulations and potential of non-invasive measurements

2012 ◽  
Vol 39 (1) ◽  
pp. 40-47 ◽  
Author(s):  
Guillaume Guérin ◽  
Norbert Mercier
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Dose Rate ◽  
Gamma Dose ◽  
Luminescence Dating ◽  
Gamma Dose Rate ◽  
Invasive Technique ◽  
Simple Method ◽  
Dose Rates ◽  
Non Invasive

Abstract The determination of gamma dose rates is of prior importance in the field of luminescence dating methods. In situ measurements are usually performed by the insertion of dosimeters or a portable gamma spectrometer cell in sediments. In this paper, Monte-Carlo simulations using the Geant4 toolkit allow the development of a new technique of insitu gamma dose rate evaluations: a spectrometer cell is placed on the surface of sediments under excavation to acquire successive spectra as sediments are removed by excavations. The principle of this non-invasive technique is outlined and its potential is discussed, especially in the case of environments in which radioelements are heterogeneously distributed. For such cases, a simple method to reconstruct gamma dose rate values with surface measurements using an attenuator is discussed, and an estimation of errors is given for two simple cases. This technique appears to be applicable, but still needs experimental validation.

Activity Concentrations of Natural Radionuclides in Soils of Rainforest Sites in Western Ghats

2015 ◽  
Vol 2 (3) ◽  
pp. 103-108 ◽  
Author(s):  
P. K. Manigandan ◽  
K K Natrajan
Keyword(s):  
Western Ghats ◽  
Natural Radionuclides ◽  
Gamma Dose ◽  
Radiological Protection ◽  
Dose Rates ◽  
Naturally Occurring ◽  
Gamma Dose Rates ◽  
Activity Concentrations ◽  
Naturally Occurring Radionuclides ◽  
Radiological Hazard Indices

Assessments of naturally occurring radionuclides in soil collected from a tropical rainforest forest of western Ghats, India were conducted. These radionuclides were distributed unevenly in the forest soil. For all soil samples, the terrestrial gamma dose rate and the corresponding outdoor annual effective dose equivalents were evaluated. The activity concentration of 232Th and average outdoor gamma dose rates were found to be higher than the global average which appears to affects Western Ghats environment in general, the radiological hazard indices were found to be within the International Commission on Radiological Protection recommended limits. Hence, obtained results for natural radionuclides in the forest soils were within the range specified by UNSCEAR (2000) report for virgin soils except 232Th.

scholarly journals A preliminary study of geological variation of in-situ gamma dose rate in the vicinity of coal-fired power plants

2021 ◽  
Vol 23 (4) ◽  
pp. 1810-1817
Author(s):  
Vu Ngoc Ba ◽  
Bui Ngoc Thien ◽  
Truong Thi Xuan Truong ◽  
Nguyen Quang Dao ◽  
Le Xuan Thuyen ◽  
...  
Keyword(s):  
Dose Rate ◽  
Power Plants ◽  
Fossil Fuels ◽  
Gamma Dose ◽  
Gamma Dose Rate ◽  
Coal Consumption ◽  
Dose Rates ◽  
Average Value ◽  
Effective Doses ◽  
The Difference

Introduction: The utilization of fossil fuels in coal-fired power plants (CFPPs) for electricity generation could lead to the release of additional natural and artificial radioisotopes into the surrounding environment and consequently, increase the gamma dose rate at these areas. Methods: In this study, the geological variation of gamma dose rate in the vicinity of Duyen Hai CFPP complex and Vinh tan CFPP complex were evaluated. Results: The obtained gamma dose rates were in the range from 0.07 to 0.22 μSv h-1 with the average value of 0.13 μSv h-1 for Duyen Hai area and in the range from 0.14 to 0.34 μSv h-1 with the average value of 0.21 μSv h-1. The results indicated that the gamma dose rate in Vinh tan area is higher than the corresponding value of Duyen Hai area. Both natural aspects, such as the geological differences as well as geomorphology and weathering process, and anthropogenic aspects, such as the difference in operational scale, coal consumption and ash discharge between Duyen Hai and Vinh Tan CFPP complex, might significantly contribute to the variation of gamma dose rate in the investigated locations. Conclusion: Overall, the calculated outdoor annual effective doses of two studied areas showed that the radiological impacts of both Duyen Hai and Vinh Tan CFPP complex to the environment and public health are negligible.

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