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

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 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.

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 Determination of the Radiation Hazard Indices and Excess Lifetime Cancer Risk in Iraqi Bentonite

2018 ◽  
Vol 21 (1) ◽  
pp. 52-58
Author(s):  
Rasha S. Ahmed ◽  
◽  
Raghad. S. Mohammed ◽  
Ahlam Rashid Kharbat ◽  
◽  
...  
Keyword(s):  
Cancer Risk ◽  
Radiation Hazard ◽  
Hazard Indices ◽  
Lifetime Cancer Risk ◽  
Excess Lifetime Cancer Risk ◽  
Radiation Hazard Indices

scholarly journals Evaluation of background radiation level and excess lifetime cancer risk in Doon valley, Garhwal Himalaya

2021 ◽  
Author(s):  
Tushar Kandari ◽  
Prakhar Singh ◽  
Poonam Semwal ◽  
Ankur Kumar ◽  
A. A. Bourai ◽  
...  
Keyword(s):  
Cancer Risk ◽  
Background Radiation ◽  
Mean Value ◽  
Garhwal Himalaya ◽  
Gamma Ray Spectrometry ◽  
Human Beings ◽  
Lifetime Cancer Risk ◽  
Doon Valley ◽  
Average Value ◽  
Excess Lifetime Cancer Risk

AbstractRadionuclides such as Ra-226, Th-232 & K-40 occurs naturally in the earth crust from its creation and are main contributor to the dose received by human beings. The present study was carried-out in the Doon valley which is outlined in the Main Boundary Thrust (MBT) region of Garhwal Himalaya in Uttarakhand, India. The collected soil/rock samples were analyzed by NaI(Tl) Gamma ray spectrometry for the analysis of radionuclides and hence measuring the various health hazard indices and Excess lifetime cancer risk. Radionuclide (226Ra, 232Th & 40K) content were found to vary from 47 ± 9 to 442 ± 50 Bq Kg−1, 45 ± 17 to 101 ± 16 Bq Kg−1 & 320 ± 281 to 947 ± 197 Bq Kg−1 respectively and were higher than the world average values which are 35 Bq Kg−1, 30 Bq Kg−1 and 400 Bq Kg−1 respectively. Higher radionuclide content contributes to higher amount of absorbed doses which was found to vary from 93 to 259.6 ηGyh−1 with a mean value of 112.5 ηGyh−1 and Gamma index which found to vary from 0.73 to 1.92 with a mean value of 0.96. Lastly, on the basis of annual effective doses received to humanoid, Excess lifetime cancer risk was measured which varies from 0.48 × 10–3 to 1.34 × 10–3 with an average value of 0.65 × 10–3 and was much below the world’s average value of 1.45 × 10–3.

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.

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

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