scholarly journals Assessment of Natural Radioactivity Level and Radiological Index in the Vicinity of Lynas Rare-earth Processing Plants

2018 ◽  
Vol 34 (2) ◽  
Author(s):  
W.M. ZAL U’YUN ◽  
M.W. YII ◽  
K. MOHD ASHHAR ◽  
M.K. KHAIRUDDIN ◽  
I. ABDUL KADIR ◽  
...  
Keyword(s):  
Rare Earth ◽  
Natural Radioactivity ◽  
Natural Radionuclides ◽  
Soil Samples ◽  
Radioactive Material ◽  
Radiation Hazard ◽  
Secular Equilibrium ◽  
Radiation Level ◽  
Radioactivity Level ◽  
Processing Plants

The findingsof the sudy on assessment of natural radioactivity level and radiation hazard parameters in the vicinity of Lynas rare-earth processing plants are reported. This studyaims to quantify the environmental levels of natural radionuclides in soil collected in the vicinity of Lynas rare-earth processing plants and thereby to assess potential radiological hazards to the environment. About 31 terrestrialsampling locations were chosen for collection of the soil samples. The activity concentrations of the naturally occurring radioactive material (NORM) members, i.e. 226Ra, 228Ra, 238U, 232Th and 40K were measured using HpGe gamma spectrometer after reaching 30 days of secular equilibrium with their daughters. The mean activity concentration of 226Ra 228Ra 238U, 232Th and 40K in soil samples were 35 Bq/kg, 62 Bq/kg, 38 Bq/kg, 60 Bq/kg and 245 Bq/kg, respectively. The estimatedRaeq and Hex readings due to natural environmental radiation in respectively lower than the recommended value of 370 Bq/kg and unity. Meanwhile, the total air absorbed dosage rate was slightly higher than the estimatedaverage global terrestrialradiation but much lower compared to other regions in Malaysia. The results indicated that the radiation hazard in the vicinity of the Lynas rare-earth processing plants was negligible. Thus, it could be concluded that there were no additional radiation level and no radiological hazard effects to the people living in the surrounding areas.

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 Measurements of natural radioactivity in soil samples collected in the Kampinoski National Park

2019 ◽  
Vol 100 ◽  
pp. 00052
Author(s):  
Aneta Łukaszek-Chmielewska ◽  
Martin Girard ◽  
Olga Stawarz ◽  
Barbara Piotrowska ◽  
Karol Wojtkowski ◽  
...  
Keyword(s):  
Natural Radioactivity ◽  
National Park ◽  
Natural Radionuclides ◽  
Germanium Detector ◽  
Absorbed Dose ◽  
Soil Samples ◽  
Radiation Hazard ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
Mean Values

In this article are presented the results of measurements of natural radioactivity in twelve soil samples from the Kampinoski National Park by using high purity germanium detector (HPGe). The average values of the natural radionuclides 40K, 226Ra and 228Ac concentrations in the soil samples are 8.54, 6.65 and 206 Bq/kg respectively. Additionally radiation hazard indices were calculated to evaluate the radiological risk for the public and environment. The results show that the mean values of radium equivalent activity (Raeq) and gamma absorbed dose rate (D) in the air, outdoor annual effective dose equivalent (Eout), and representative level index (Iγ) for analyzed samples were lower than the limit recommended by the United Nations Scientific Committee on the Effect of Atomic Radiation (UNSCEAR). This study is the first to evaluate the radiological impacts in the investigation area.

scholarly journals Natural Radioactivity in Soil and Bitumen in Al-Marj Spring and Abu-Jir Village, Anbar, Western Iraq

2021 ◽  
Vol 54 (2E) ◽  
pp. 12-23
Author(s):  
Haneen A. Jassam
Keyword(s):  
Organic Matter ◽  
Natural Radioactivity ◽  
Natural Radionuclides ◽  
Radioactive Material ◽  
Hydrocarbon Accumulation ◽  
Naturally Occurring ◽  
High Purity Germanium ◽  
The World ◽  
Naturally Occurring Radioactive Material ◽  
Γ Ray

The aim of the present research is to illustrate γ-ray levels emitting from soil and bitumen producing from 238U, 232Th, and 40K along Abu-Jir Fault Zone. in the area extended from Al-Marj valley to Abu-Jir village using scintillometer device. Such study is important in environmental assessment to buildup data base about radioactivity. The concentration of natural radionuclides in the study area was determined to be occurring mostly in the clay minerals and organic matter. A high purity germanium spectrometer was used to detect the activity of these elements which ranged between 00.6±18.1- 1526±102, 0- 8.4±1.4, and 70.1±10.9- 328.2±73 in soil, and 28.2±5.6- 94±22.1, 0- 2.2±0.5, and 38.4±7.9- 70.1±10.9 in bitumen for 226Ra, 232Th, and 40K respectively. The anomaly of the Naturally occurring radioactive material was associated with hydrocarbon accumulation and springs. The source of 232Th and 40K came from the same source rock (illite), while 226Ra was associated with ascending fluids. The obtained results showed that the activity of 226Ra in soil has value above the world averages and other countries.

scholarly journals Natural Radioactivity in Soil and Water from Likuyu Village in the Neighborhood of Mkuju Uranium Deposit

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Najat K. Mohammed ◽  
Mohamed S. Mazunga
Keyword(s):  
Natural Radioactivity ◽  
Water Samples ◽  
Uranium Deposit ◽  
Atomic Energy Commission ◽  
Natural Radionuclides ◽  
Control Sample ◽  
Soil Samples ◽  
High Concentration ◽  
Average Activity ◽  
Radioactivity Levels

The discovery of high concentration uranium deposit at Mkuju, southern part of Tanzania, has brought concern about the levels of natural radioactivity at villages in the neighborhood of the deposit. This study determined the radioactivity levels of 30 soil samples and 20 water samples from Likuyu village which is 54 km east of the uranium deposit. The concentrations of the natural radionuclides 238U, 232Th, and 40K were determined using low level gamma spectrometry of the Tanzania Atomic Energy Commission (TAEC) Laboratory in Arusha. The average radioactivity concentrations obtained in soil samples for 238U (51.7 Bq/kg), 232Th (36.4 Bq/kg), and 40K (564.3 Bq/kg) were higher than the worldwide average concentrations value of these radionuclides reported by UNSCEAR, 2000. The average activity concentration value of 238U (2.35 Bq/L) and 232Th (1.85 Bq/L) in water samples was similar and comparable to their mean concentrations in the control sample collected from Nduluma River in Arusha.

scholarly journals The Activity Concentrations and Radium Equivalent Activity in Soil Samples Collected from the Eastern Part of Basrah Governorate in Southern Iraq

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Rasha S. Ahmed ◽  
Raghad S. Mohammed ◽  
Rana O. Abdaljalil
Keyword(s):  
Hazard Index ◽  
Soil Samples ◽  
Radiation Hazard ◽  
Radium Equivalent Activity ◽  
Radioactivity Level ◽  
Normal Limits ◽  
Activity Concentrations ◽  
Normal Ranges ◽  
Radium Equivalent ◽  
Southern Iraq

Clay soil samples (0, 30, and 60 cm depths) were collected from two districts (Abu Al Khasib and Ad Dayr) in Basrah governorate in southern Iraq for gamma-ray spectroscopy. The activity concentrations for natural existing radionuclides in 18 soil samples were measured using high-purity germanium detector HPGe. From the obtained results of γ-ray spectroscopy, the 238U activity concentrations were found to be ranging from 2.4 to 5.6 ppm with an average of 3.5 ppm in Abu Al Khasib and ranging from 2.1 to 4.5 ppm with an average of 2.9 ppm in Ad Dayr. 232Th concentrations were ranging from 3.6 to 7.5 ppm with an average of 4.7 ppm in Abu Al Khasib and ranging from 3.7 to 7.9 ppm with an average of 5.0 ppm in Ad Dayr. 40K concentration was ranging from 0.1% to 2.0% with an average of 1.2% in Abu Al Khasib and ranging from 0.9% to 1.8% with an average of 1.3% in Ad Dayr. High 238U and 226Ra concentration levels were recorded in both study regions. The concentrations of 232Th are within the normal limits in both regions. High levels of 40K were recorded in some locations. Generally, in most locations, 40K activity was within normal ranges. The radium equivalent activity, the external hazard index, the internal hazard index, and the radioactivity level index were calculated to estimate the radiation hazard in Basrah. The estimated radiation hazard indices were within normal limits, except the radioactivity level index, which shows elevated values. The obtained results were compared with other countries and with the worldwide median certified values.

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