Evaluation of excess life time cancer risk due to natural radioactivity of the Lignite samples of the Nichahoma, lignite belt, North Kashmir, India

2016 ◽  
Vol 104 (9) ◽  
pp. 673-680 ◽  
Author(s):  
Mudasir Ashraf ◽  
C. Anu Radha ◽  
Shakeel Ahmad ◽  
Sajad Masood ◽  
Rayees Ahmad Dar ◽  
...  
Keyword(s):  
Cancer Risk ◽  
Specific Activity ◽  
Strong Dependence ◽  
Life Time ◽  
Radiation Hazard ◽  
Radium Equivalent Activity ◽  
Lifetime Cancer Risk ◽  
Average Value ◽  
Naturally Occurring Radionuclides ◽  
Radium Equivalent

Abstract Naturally occurring radionuclides of the 226Ra, 232Th, and 40K present in the lignite samples was measured by using a low-background Pb-shielded gamma spectroscopic counting assembly utilizing NaI(Tl) detector for the measurement and to evaluation the radiation hazard indices and excess life time cancer risk. The average values of specific activity concentrations in the investigated lignite samples was found to be 45.36 Bq kg−1 for 226Ra, 21.42 Bq kg−1 for 232Th, 40.51 Bq kg−1 for 40K and 79.11 Bq kg−1 for Raeq respectively. The average value excess life time cancer risk was found to be relatively higher than the world average. Moreover, the correlation analysis shows the strong dependence of excess lifetime cancer risk on measured dose and the radium equivalent activity.

scholarly journals Excess lifetime cancer risk due to natural background radiations of Soil in North Kashmir

JMS SKIMS ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 101-108
Author(s):  
Mudasir Ashraf Shah ◽  
Mukhtar Thoker ◽  
Sajad Ahmad ◽  
C Anu Radha
Keyword(s):  
Cancer Risk ◽  
Life Time ◽  
Radiation Hazard ◽  
Radium Equivalent Activity ◽  
Lifetime Cancer Risk ◽  
Background Radiations ◽  
Average Value ◽  
Excess Lifetime Cancer Risk ◽  
Radium Equivalent

Background: Long-term exposure to environmental radioactivity and the associated external exposure due to gamma emitting radionuclides have serious health effects particularly on cancer risk. Of course, the soil radioactivity depends on the underlying rocks and consequently, the soil type and geographic conditions.Objectives: Evaluation of excess life time cancer risk due to natural radioactivity of the soil of the surface layer of the Nichahoma lignite belt and the soil of villages surrounding the lignite belt.Methods: In this particular study, stirring radionuclides of the Ra226, Th232, and K40 present in the soil samples of the lignite belt and soil of the villages surrounding the lignite belt were measured by using a low-background Pb-shielded gamma spectroscopic counting assembly utilizing NaI(Tl) detector for the measurement and to evaluation the radiation hazard indices and excess lifetime cancer risk.Results: The excess lifetime cancer ranged from 0.65×10-3 to 0.71× 10-3 (average ~0.68×10-3) for the soil of the lignite belt and from 1.15×10-3 to 1.34×10-3(average ~1.25×10-3) for the soil of the villages surrounding the belt. The correlation analyses, performed between the radium equivalent activity and excess lifetime cancer risk for the two types of the sample, showed a very strong and linear dependence of excess lifetime cancer risk on radium equivalent activity and measured dose rate for the soil of the lignite belt compared to the soil of the villages surroundingthe lignite belt.Conclusion: Compared to the world average, the average value of computed excess lifetime cancer risk for both the categories of investigated samples in the study was found to be higher than 0.29. JMS 2018: 21 (2):101-108

scholarly journals Radioactivity in soil from Mojkovac, Montenegro, and assessment of radiological and cancer risk

2012 ◽  
Vol 27 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Nevenka Antovic ◽  
Danilo Boskovic ◽  
Nikola Svrkota ◽  
Ivanka Antovic
Keyword(s):  
Cancer Risk ◽  
Absorbed Dose ◽  
Radiation Hazard ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
Lifetime Cancer Risk ◽  
Gonadal Dose ◽  
Mean Lifetime ◽  
Radium Equivalent ◽  
Average Activity

Soil samples from Mojkovac, Montenegro, were analyzed by standard gamma-spectrometry for radioactivity due to 226Ra, 232Th, 40K, and 137Cs. Average activity concentrations have been found to be 28.6, 43.1, 620.8, and 55 Bq/kg, respectively. In order to evaluate the radiation hazard, radium equivalent activity, absorbed dose rate, annual effective dose, external and internal hazard indexes, and the annual gonadal dose equivalent were determined and found to be at an average of 133.79 Bq/kg, 65.18 nGy/h, 79.93 mSv/y, 0.37, 0.45, and 0.46 mSv/y, respectively. With life expectancy taken to be 70 years, a mean lifetime outdoor gamma radiation was calculated as 5.6 mSv, yielding a lifetime cancer risk of 2.8?10-4.

scholarly journals Radiation Risk Assessment on Public in Motijheel Thana, Dhaka, Bangladesh

2021 ◽  
Vol 9 (1) ◽  
pp. 23-31
Author(s):  
Mohammed Belayet Hossain ◽  
Dr. Mohammad Sohelur Rahman ◽  
Dr. Mohammad Amir Hossain Bhuiyan ◽  
Selina Yeasmin
Keyword(s):  
Cancer Risk ◽  
Effective Dose ◽  
Real Time ◽  
Annual Effective Dose ◽  
Life Time ◽  
Radiation Monitoring ◽  
Radiation Hazard ◽  
Monitoring Device ◽  
The Real ◽  
Average Value

Objective: The pollution free environment is required for healthy life. The real-time radiation monitoring is very important for radiation hazard detection in the environment. The excess life-time cancer risk (ELCR) on public is to assess based on the real-time radiation monitoring data in the area. Methods: The real-time radiation monitoring was performed using portable digital radiation monitoring device. This real-time digital portable radiation monitoring device meets all European CE standards as well as the American “FCC 15 standard”. The real-time digital portable radiation monitoring device was placed at 1 meter above the ground on tripod and data collection time for each monitoring point (MP) was 1 hour. 27 MPs were chosen for collection of real-time radiation data at various outdoor environment in Motijheel Thana, Dhaka from May-August 2018.Results: The real-time radiation dose rates at Motijheel Thana due to natural radionuclides were ranged from 0.095 ± 0.041 µSv.h-1 to 0.185 ± 0.042 µSv.h-1 with an average of 0.147 ± 0.047 µSv.h-1. The annual effective dose to public from outdoor environmental radiation at Motijheel Thana were found to be 0.166 ± 0.066 mSv to 0.324 ± 0.061 mSv with an average of 0.257 ± 0.039 mSv. Excess Life-time Cancer Risk (ELCR) on public are also estimated based on annual effective dose that is ranged from 0.662 ×10-3 to 1.289 ×10-3 with an average value of 1.025 ×10-3, which is higher than world average value of 0.29×10-3. Conclusion: This type of study is required for detection of the radiation hazard arising from the natu-ral as well as man-made sources and also for generation of the baseline database. From this study, it is observed that there is no pose any radiation hazard in the study area due to man-made sources.

scholarly journals Measurement of Radioactivity And Assessment of Radiological Hazard of Tea Samples Collected From Local Market In Bangladesh

2018 ◽  
Vol 42 (2) ◽  
pp. 171-176 ◽  
Author(s):  
Mst Najnin Aktar ◽  
Suranjan Kumar Das ◽  
Selina Yeasmin ◽  
MM Mahfuz Siraz ◽  
AFM Mizanur Rahman
Keyword(s):  
Natural Radionuclides ◽  
Radiation Hazard ◽  
Local Market ◽  
Radiological Hazard ◽  
Hazard Indices ◽  
Radium Equivalent Activity ◽  
Dose Rates ◽  
Average Value ◽  
Activity Concentrations ◽  
Radium Equivalent

The activity concentrations of natural radionuclides and radiological hazard indices in eleven tea samples collected from local market in Bangladesh have been analyzed by using High Purity Germanium (HPGe) Detector. The average activity concentrations of 226Ra, 232Th and 40K in tea samples have been found to be 21.21±14.04, 32.43±7.48 and 93.47 ± 43.94 Bqkg-1 respectively. The calculated absorbed dose rates due to these radioactive nuclides in tea samples have been found to vary from 26.24 nGyh-1 to 37.95 nGyh-1 and average value was 33.28 nGyh-1. The estimated outdoor annual effective dose rates varied from 38.64  µSvy-1 to 55.89 µSvy-1 with the mean value of 49.02 µSvy-1 which is less than the world average value of 1000 µSvy-1. The values of radium equivalent activity in all samples are less than the permissible maximum value of the radium equivalent activity which is 370 Bqkg-1 according to UNSCEAR 2000 report. The values of external and internal hazard indices for different samples varied from 0.16 to 0.23 with the average value of 0.20 and from 0.21 to 0.29 with an average of 0.26. The value of this index must be less than unity in order to keep the radiation hazard insignificant. It was also found that there is no artificial radionuclide (for example 137Cs) in any of the samples. The data generated in this study will provide baseline radiometric values for natural and artificial radioactivity in tea samples in Bangladesh. Journal of Bangladesh Academy of Sciences, Vol. 42, No. 2, 171-176, 2018

scholarly journals A review: Natural and artificial radionuclides and radiation hazard parameters in the soil of mountain regions in Serbia

2020 ◽  
Vol 65 (1) ◽  
pp. 1-18
Author(s):  
Branislava Mitrovic ◽  
Dragana Todorovic ◽  
Jelena Ajtic ◽  
Borjana Vranjes
Keyword(s):  
Natural Radionuclides ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Radiation Hazard ◽  
Dose Equivalent ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
Lifetime Cancer Risk ◽  
External Hazard Index ◽  
Hazard Parameters

This review paper discusses the content of natural (40K, 238U, 226Ra, and 232Th) and artificial (137Cs) radionuclides in the soil of the mountains of Maljen, Tara and Kopaonik in the Republic of Serbia over 2002-2015. In addition, the paper gives radiation hazard parameters, i.e., radium equivalent activity, absorbed dose rate, annual effective dose equivalent, external hazard index, annual gonadal dose equivalent, and excess lifetime cancer risk outdoors that we calculated from the obtained content of the natural radionuclides in the soil samples. We compared the parameters to previously published results for different parts of the country and looked into the radioecological status of the investigated areas.

scholarly journals Using Gamma Spectroscopy to Calculate Radioactive Contaminants in Foreign and Local Tobacco Samples

2020 ◽  
Vol 55 (2) ◽  
Author(s):  
Ahmed F. Mkhaiber ◽  
Auday T. Al-Bayati ◽  
Enas A. Jawad ◽  
Khalid H. Mahdi
Keyword(s):  
Gamma Ray ◽  
Specific Activity ◽  
Gamma Spectroscopy ◽  
Natural Radionuclide ◽  
Germanium Detector ◽  
Average Concentration ◽  
Radium Equivalent Activity ◽  
Lifetime Cancer Risk ◽  
Potassium 40 ◽  
Thorium 232

The normal radioactivity levels of Uranium-238, Thorium-232, and Potassium-40 were calculated for ten types of foreign and local cigarettes available on the Iraqi market using a gamma-ray spectroscopy technique employing the germanium detector system. The results of this study showed that the average specific activity for each of Uranium-238, Thorium-232 and Potassium-40 were 21.689± 4.596, 18.906 ± 4.148, and 430.094 ± 19.449 (Bq/Kg) respectively. The annual effective dose, radium equivalent activity and excess lifetime cancer risk for the studied samples were also calculated, and their rates were 11.582 μsv/y, 81.841 Bq/Kg, and 40.538 people per million per year respectively. The outcomes indicate that the rate of concentration of uranium and thorium is lower than the permissible values, whereas the average concentration of potassium was slightly higher than the permissible values. This research is important because it warns against several types of cigarettes that contain high concentrations of radionuclides, which can lead to infection cancer and then lead to the death of the person who has used it profusely. Therefore, the aim of the current research is to evaluate the radiological risks of radionuclides in tobacco cigarette smoke by evaluating their natural radionuclide concentrations.

scholarly journals Assessment of Natural Radioactivity Levels and Radiation Hazards for Soil Samples Used in Erbil Governorate, Iraqi Kurdistan

2019 ◽  
Vol 7 (1) ◽  
pp. 34 ◽  
Author(s):  
Zakariya A. Hussein
Keyword(s):  
Natural Radioactivity ◽  
Gamma Spectroscopy ◽  
Health Hazard ◽  
Natural Radionuclides ◽  
Soil Samples ◽  
Radiation Hazard ◽  
Lifetime Cancer Risk ◽  
Iraqi Kurdistan ◽  
Activity Concentrations ◽  
Radium Equivalent

In this work, the activity concentrations of natural radionuclides 226Ra, 232Th and 40K in soil samples from Erbil governorate, Iraqi Kurdistan were investigated by a gamma-spectroscopy system based on high-purity germanium (HPGe) detector. This is to assess the dose of radionuclides exposure to the population, knowing the health risks and to have a baseline for future changes in the environmental radioactivity. It was found that the activity concentrations of 226Ra, 232Th and 40K were ranged from (14.6 ± 1.6 to 38.2 ± 2.8 Bq.kg-1),  (4.5 ± 1.4 to 52.4 ± 5.8 Bq.kg-1) and ( 302.8 ± 12.6 to 388.6 ± 12.8 Bq.kg-1), respectively. The measured activity concentrations for these radionuclides were compared with the reported data of other countries and with the worldwide average activity of soil. Radium equivalent activities, absorbed dose rate, excess lifetime cancer risk and the values of hazard indices were calculated for the measured samples to assess the radiation hazard of the natural radioactivity in all samples to the people. It was concluded that the radium equivalent activities of the studied samples are below the internationally accepted values. These results show that annual effective dose absorbed via occupant from activity construction of soil samples used in the under place is below 1.0 mSv.y-1. It is concluded that the assessment radioactivity of soil are within acceptable levels and does not pose any health hazard to the population.

scholarly journals Effect of Fukushima Accident on Tourists Based Coastal Belts of Chittagong City, Bangladesh

2018 ◽  
Vol 40 (1) ◽  
pp. 111-136
Author(s):  
Hasan Murad ◽  
Md Kowsar Alam ◽  
Shyamal Ranjan Chakraborty ◽  
AKM Rezaur Rahman ◽  
SI Bhuian ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Research Work ◽  
Degree Of Freedom ◽  
Radiation Hazard ◽  
Poor Correlation ◽  
Radium Equivalent Activity ◽  
Chi Square ◽  
Fukushima Accident ◽  
Dose Rates ◽  
Radium Equivalent

This research work was aimed to obtain the radioactive exposure of naturally occurring and anthropogenic radioactive materials in sediment samples from the coastal belts of Chittagong city due to the Fukushima nuclear accident. The activity concentration, absorbed outdoor and indoor dose rates, annual effective dose rates and the radiation hazard indices from these samples were calculated. The correlation coefficient and Chi-square value per degree of freedom were also determined. A strong correlation between radium equivalent activity and activity of 232Th was obtained in the Bay of Bengal. However, a very poor correlation was observed for radium equivalent activity and activity of 40K in both the study areas. The Chi-square value per degree of freedom (χ2R) for 226Ra, 232Th and 40K were respectively 70.244, 77.168 and 1.87 for the Karnaphuli River samples and 38.091, 62.023 and 2.06 for the Bay of Bengal samples. No artificial radionuclide was detected in the samples measured from the study areas. No radiation threat level is obtained on the study areas due to the nuclear explosion at Fukushima. The Chittagong Univ. J. Sci. 40 : 111-136, 2018

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