Natural radioactivity, radon emanating power and mass exhalation rate of environmental soil samples from Karabük province, Turkey

2020 ◽  
Vol 108 (7) ◽  
pp. 573-579 ◽  
Author(s):  
Aslı Kurnaz ◽  
Şeref Turhan ◽  
Aybaba Hançerlioğulları ◽  
Elif Gören ◽  
Muhammet Karataşlı ◽  
...  
Keyword(s):  
Cancer Risk ◽  
Effective Dose ◽  
Dose Rate ◽  
Annual Effective Dose ◽  
Natural Radionuclides ◽  
Soil Samples ◽  
Gamma Dose ◽  
Gamma Dose Rate ◽  
Exhalation Rate ◽  
Lifetime Cancer Risk

AbstractIn this study, content of natural radionuclides (226Ra, 232Th and 40K) and radon emanating power and radon mass exhalation rate of surface soil samples collected around industrial province Karabük in which the first iron steel plant was built in 1937 were determined by high-resolution γ-ray spectrometry with a high purity germanium detector. The average activity concentration of 226Ra, 232Th and 40K in soil samples were measured as 30 ± 2, 28 ± 2 and 251 ± 20 Bq kg−1, respectively. The average value of radon emanating power and mass exhalation rate of soil samples were found as 31 % and 19 μBq kg−l s−l, respectively. Assessment of possible radiation hazards to the people due to external exposure was done by estimating the outdoor absorbed gamma dose rate in the air at 1 m above the soil, the corresponding annual effective dose, and the excess lifetime cancer risk. The average outdoor gamma dose rate, annual effective dose, and lifetime cancer risk were estimated as 41 nGy h−1, 51 μSv y−1 and 2.0 × 10−4, respectively. A comparison of the activity and radiological results obtained for the studied samples with the corresponding worldwide average values indicates that the results are below the world average values.

ASSESSMENT OF INDOOR GAMMA RADIATION AND DETERMINATION OF EXCESS LIFETIME CANCER RISK IN TEHRAN IN WINTER AND SPRING 2017

2018 ◽  
Vol 184 (2) ◽  
pp. 148-154 ◽  
Author(s):  
Marjan Hashemi ◽  
Leila Akhoondi ◽  
Mohammad Hossien Saghi ◽  
Akbar Eslami
Keyword(s):  
Cancer Risk ◽  
Gamma Radiation ◽  
Dose Rate ◽  
Annual Effective Dose ◽  
Gamma Dose ◽  
Gamma Dose Rate ◽  
Lifetime Cancer Risk ◽  
Average Value ◽  
Excess Lifetime Cancer Risk

Abstract Natural radiation is a feature of the environment in which we live. One of the contributions of human exposure to ionizing radiation due to natural sources arises from gamma radiation. Therefore, present study was aimed to evaluate and map indoor gamma dose rate in Tehran. The corresponding annual effective dose (AED) and excess lifetime cancer risk (ELCR) were also calculated. All measurements were performed by a Geiger Muller detector in 43 dwellings in Tehran. The average indoor gamma dose rate in Tehran was appointed as 343.2 nGy/h. AED and ELCR were calculated as 2.4 mSv and 10.3 × 10−3, respectively. The evaluated indoor gamma dose rate and calculated AEDs and lifetime cancer risk were found higher than the world average value.

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.

Assessment of Natural Radioactivity in Some Soil Samples from Kutha District in Babylon Governorate, Iraq

2021 ◽  
Vol 14 (3) ◽  
pp. 267-274
Keyword(s):  
Cancer Risk ◽  
Effective Dose ◽  
Natural Radioactivity ◽  
Annual Effective Dose ◽  
Soil Samples ◽  
Lifetime Cancer Risk ◽  
Excess Lifetime Cancer Risk ◽  
Effective Annual Dose ◽  
Study Results ◽  
Radium Equivalent

Abstract: The activity concentrations of natural radionuclides of the elements (40K, 238U and 232Th), collected from Kutha district of Babylon governorate are studied and evaluated. Twenty soil samples with (0-15) cm in depth are collected. Gamma spectrometer NaI (TI) source is used for calibration. The radioactivities of natural isotopes K-40, U-238 and Th-232, were assessed. These studies show that radio activities of isotopes are acceptable according to the standard levels. Also, the activity of radium equivalent, the rate of annual effective dose, average air volume and external risk index are evaluated. The results are found within the internationally tolerable values. The results show that the mean of the radioactivity of 238U is (19.1565)Bq / kg, while it is (54.501) Bq/kg for 232Th and (179.578) Bq/kg for 40K. The study results showed that the average of radiological effects, like the Radium equivalent (Raeq), the rate of absorbed dose (Dr), the index of external hazard (Hex), the index of internal hazard (Hin), the index of representative gamma hazard (Iγ), the Annual Effective Dose Equivalent (AEDE) and the Excess Lifetime Cancer Risk (ELCR) are as follow: 110.920 Bq/kg, 50.1838 nGy/h, 0.29953, 59.1530, 27.996, 0.34 mSv/y and 1.268x10-3, respectively. Keywords: Natural radioactivity, Absorption, External hazard, Effective annual dose, Excess lifetime cancer risk.

scholarly journals Impact of Lockdown during COVID-19 on Annual Effective Dose Equivalent values of Natural Gamma Radiation

2020 ◽  
Author(s):  
Manoj Kumar Jindal ◽  
Santosh Kumar Sar
Keyword(s):  
Effective Dose ◽  
Dose Rate ◽  
Annual Effective Dose ◽  
Gamma Dose ◽  
Gamma Dose Rate ◽  
Effective Dose Equivalent ◽  
Dose Equivalent ◽  
Annual Effective Dose Equivalent ◽  
Natural Gamma ◽  
The Impact

Abstract The study aimed to find the impact of COVID-19 on values of Annual Effective Dose Equivalent of the natural Gamma dose rate from Balod, Durg and Bemetara districts of Chhattisgarh (India). COVID-19 is a severe problem for many countries and to control and prevent the spread of this problem implemented the lockdown approach in many countries, including India. In this lockdown situation, almost all people are staying at home for 24 hours. Due to the present status of COVID-19, the Indian government also fixed the 67 days lockdown and one day was already successfully done as Janta Curfew, which worked the same as a lockdown. The value of indoor gamma dose rates was reported higher in most places as compared to the outdoor gamma dose rate, but in this pandemic situation, occupancy factor values are not applicable as recommended by UNSCEAR for calculation of Annual Effective Dose Equivalent (AEDE). Therefore, the present study introduces the new equations, which can measure the extra AEDE value during the lockdown for adults, children and infants.

scholarly journals Impact of Lockdown during COVID-19 on Annual Effective Dose Equivalent values of Natural Gamma Radiation

2020 ◽  
Author(s):  
Manoj Kumar Jindal ◽  
Santosh Kumar Sar
Keyword(s):  
Effective Dose ◽  
Dose Rate ◽  
Annual Effective Dose ◽  
Gamma Dose ◽  
Gamma Dose Rate ◽  
Effective Dose Equivalent ◽  
Dose Equivalent ◽  
Annual Effective Dose Equivalent ◽  
Natural Gamma ◽  
The Impact

Abstract The study aimed to find the impact of COVID-19 on values of Annual Effective Dose Equivalent of the natural Gamma dose rate from Balod, Durg and Bemetara districts of Chhattisgarh (India). COVID-19 is a severe problem for many countries and to control and prevent the spread of this problem implemented the lockdown approach in many countries, including India. In this lockdown situation, almost all people are staying at home for 24 hours. Due to the present status of COVID-19, the Indian government also fixed the 67 days lockdown and one day was already successfully done as Janta Curfew, which worked the same as a lockdown. The value of indoor gamma dose rates was reported higher in most places as compared to the outdoor gamma dose rate, but in this pandemic situation, occupancy factor values are not applicable as recommended by UNSCEAR for calculation of Annual Effective Dose Equivalent (AEDE). Therefore, the present study introduces the new equations, which can measure the extra AEDE value during the lockdown for adults, children and infants.

Study of the radioactivity in environmental soil samples from Eastern Anatolia Region of Turkey

2018 ◽  
Vol 106 (2) ◽  
pp. 161-168 ◽  
Author(s):  
Şeref Turhan ◽  
Elif Gören ◽  
Fatma Aysun Uğur ◽  
Muhammet Karataşlı ◽  
Zehra Yeğingil
Keyword(s):  
Effective Dose ◽  
Dose Rate ◽  
Nuclear Power ◽  
Annual Effective Dose ◽  
Soil Samples ◽  
Eastern Anatolia ◽  
Lifetime Cancer Risk ◽  
Radiological Parameters ◽  
Effective Dose Rate ◽  
Annual Effective Dose Rate

AbstractIn this study, a detailed γ-ray spectrometer survey was performed to obtain the baseline data on natural and fallout radioactivity in soil samples (10–30 cm depth) collected from Iğdır which is a province in Eastern Anatolia Region of Turkey and located along the border with Armenia. Metsamor Nuclear Power Plant in Eastern Armenia is only about 20 km away from Iğdır province. The average activity concentrations of226Ra,232Th,40K and137Cs in the soil samples were found as 19.1±0.6 (range: 12.8–31.2 Bq kg−1), 21.9±0.6 (range: 11.6–36.8 Bq kg−1), 437.7±10.3 (range: 285.0–613.7 Bq kg−1) and 11.8±1.1 Bq kg−1, (range: 2.5–51.1 Bq kg−1), respectively. The radiological hazards caused by ionizing radiation emitted from these radionuclides on the population living in the region were assessed by estimating radiological parameters such as absorbed γ dose rate in outdoor and the corresponding annual effective dose rate from external exposure, annual effective dose rate from inhalation of radon and excess lifetime cancer risk. The results revealed that there is no significant radiological hazard for human population because the average values of radiological parameters are within the recommended limits.

scholarly journals Assessment of Background Radiation, Annual Effective Dose and Excess Lifetime Cancer Risk in Gonabad City

2021 ◽  
Author(s):  
Hamed Masoumi ◽  
Mohammad Keshtkar
Keyword(s):  
Cancer Risk ◽  
Effective Dose ◽  
Dose Rate ◽  
Background Radiation ◽  
Annual Effective Dose ◽  
Lifetime Cancer Risk ◽  
Indoor Space ◽  
Dose Rates ◽  
Excess Lifetime Cancer Risk ◽  
Background Gamma Radiation

Purpose: Humans are always exposed to ionizing radiation from their environment, which can have destructive effects. This study aimed to measure background gamma radiation and estimate annual effective dose and excess cancer risk in Gonabad city. Materials and Methods: The dose rate due to indoor and outdoor background radiation was measured by RDS-30 radiation survey meter at five zones on the map, including North, South, East, West, and center. Then, the annual effective dose and excess lifetime cancer risk were calculated by associated equations. Results: Mean dose rates for outdoor and indoor spaces were 0.111 µSv/h and 0.139 µSv/h, respectively. The mean background dose rate of indoor space was significantly higher than that of outdoor space. Annual effective dose and excess lifetime cancer risk were obtained as 0.817 and 2.85×10-3, respectively. Conclusion: Background radiation dose, annual effective dose, and cancer risk for Gonabad city were higher than global ones. Further investigations are needed to encompass internal background radiation doses in annual effective dose.

scholarly journals ASSESSMENT OF RADIATION DOSE RATE LEVELS AND RADIATION RISK AT THE COBALT -60 UNIT, KOMFO ANOKYE RADIOTHERAPY CENTER, GHANA.

2021 ◽  
Vol 5 (1) ◽  
pp. 34-51
Author(s):  
E C D K Addison ◽  
R A Opoku ◽  
C E B N Addison ◽  
W I Aniagyei
Keyword(s):  
Cancer Risk ◽  
Effective Dose ◽  
Dose Rate ◽  
Annual Effective Dose ◽  
Absorbed Dose ◽  
Effective Dose Equivalent ◽  
Dose Equivalent ◽  
Absorbed Dose Rate ◽  
Lifetime Cancer Risk ◽  
Annual Effective Dose Equivalent

Purpose: A study was conducted to estimate the Annual Effective Dose Equivalent (AEDE) and Excess Lifetime Cancer Risk (ELCR) caused by the presence of an artificial cobalt-60 radioactive source producing ionizing radiation levels within the radiotherapy facility at Komfo Anokye Teaching Hospital (KATH) in Ghana. This study validated the safety of cobalt-60 radioactive sources, as well as the notion of calculating the Annual Effective Dose Equivalent (AEDE) and Excess Lifetime Cancer Risk (ELCR), which contributed to reducing occupational and public exposures inside the facility. Methodology: The investigation was carried out with the use of a portable OD-01 Ionization Chamber Survey Meter. The absorbed dose rate (ADR) in air was changed between 5 m and 40 m, with measurements taken inside and around the cobalt 60 bunker, as well as at sixteen other sites within the radiation facility. Findings: From 5 m to 40 m surrounding the Cobalt-60 source, the estimated Absorbed Dose Rate in air inside the cobalt-60 bunker ranged from 0.299 0.001 to 0.977 0.005 Sv/h, with an average of 0.498 0.005 Sv/h. The estimated Annual effective dose equivalent varied from 1.100 mSv/yr to 3.595 mSv/yr around the cobalt-60 source inside the Co-60 bunker. Radiation exposure levels ranged from 0.268 0.008 Sv/h to 0.678 0.005 Sv/h, with an average of 0.440 0.004 Sv/h observed around the fifteen sites chosen. Excess Lifetime Cancer has values ranging from 3.85 10-3 to 12.58 10-3 and 3.45 10-3 to 8.73 10-3. Risks were evaluated for the cobalt and the sixteen places inside the plant. The absorbed dose values at 5 m, 10 m, and 15 m inside the Co-60 bunker and the location Co-60 bunker as part of the facility exceeded the ICRP-recommended limit of 0.57. The AEDE and ELCR levels were within the ICRP's acceptable limits. The AEDE and ELCR statistics acquired indicate that the Cobalt-60 unit and its surroundings are radiation safe, although the likelihood of employees contracting cancer from the absorbed dose and background ionizing radiation is significant over a lifetime. Recommendation: However, it is recommended that absorbed dose level monitoring and evaluation of the Radiation Therapy Technologist (RTT) and other workers surrounding the unit be monitored on a regular basis. It is also recommended that Occupational Staff, such as RTTs, spend as little time as possible in the bunker  

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