scholarly journals Assessment of Natural Radioactivity for Some Secondary Ceilings Samples in Iraq

2021 ◽  
Vol 877 (1) ◽  
pp. 012034
Author(s):  
Ali Saeed Al Rmahi ◽  
Ali Abid Abojassim
Keyword(s):  
Natural Radioactivity ◽  
World Wide ◽  
Gamma Ray ◽  
Specific Activity ◽  
Radiological Hazard ◽  
Mean Values ◽  
Hazard Risk ◽  
Two Samples ◽  
The World ◽  
Radiological Hazard Indices

Abstract This research focuses on measuring of specific activity of natural radioactive sources (238U, 232Th and 40K) in some types of secondary ceilings that used as a decorate material and available in Iraqi markets. The measurements were done using gamma ray spectroscopy system that based on NaI(Tl) Detector. Also, the radiological hazard indices have been assessed for all samples in present study. The results show that the specific activity vary from 8.7±0.6 to 32.9±2.3 Bq/kg for 238U, 2.9±0.2 to 40.3±1.5 Bq/kg for 232Th, and 117.4±2.6 to 649.1±7.9Bq/kg for 40K. The latter levels were compared with the world mean values that reported by the UNSCEAR 2008. It was found that all values of 238U and 232Th were below the world wide published values, while the values of only two samples of 40K were above the upper range of the world wide published values. Regarding the average values of radiological hazard risk were found to be within the permissible limit according to the OECD, UNSCEAR 2000, and ICRP. It can be concluded that natural radioactivity levels together with radiological hazard risk studied from the most of the secondary ceilings samples available in local markets of Iraq within natural rates of permissible limits and may not cause any danger to the human when being used.

Comparing of the Natural Radioactivity in Soil Samples of University at Al-Husseineya and Al-Mothafeen Sites of Kerbala, Iraq

2021 ◽  
Vol 14 (2) ◽  
pp. 177-191
Keyword(s):  
Natural Radioactivity ◽  
Gamma Ray ◽  
Specific Activity ◽  
Soil Samples ◽  
Standard Errors ◽  
Radiological Hazard ◽  
Gis Technology ◽  
Mean Values ◽  
The Mean ◽  
Radiological Hazard Indices

Abstract: Radioactivity must be studied in soil to see the changes in the doses of human exposure. In this study, natural radioactivity and radiological hazard indices in soil samples of the Faculty of Agriculture (Al-Husseineya site) and the Faculty of Medicine (Al-Mothafeen site) in Kerbala Governorate were determined using gamma-ray spectroscopy. The results showed that the mean values of specific activity (in units of Bq/kg) and standard errors of: 238U, 232Th and 40K at Al-Husseineya site was 21.7±7.2, 9.43±3.2 and 335.8±82.2, respectively, while at Al-Mothafeen site, the mean values and standard errors were 22.4±8.8, 11.2±3.3 and 333.1±70.7, respectively. Radiation maps of natural radioactivity (238U, 232Th and 40K) at Al-Husseineya and Al-Mothafeen sites were mapped using geographic information system (GIS) technology. Moreover, most results in the present study fall within the acceptable levels, as defined by OCDE, UNSCEAR and ICRP. Therefore, there is no significant radiological hazard at the sites which were studied. Keywords: Radiological hazard, Natural radioactivity, Soil, NaI (Tl), Gamma-ray, Karbela University.

scholarly journals Environmental Radioactivity evaluation and its health-related effects using gamma spectrometry in Delanta-Dawunt, Wollo District, Ethiopia

2021 ◽  
Author(s):  
Mekuanint Lemlem Legasu ◽  
Ashok K Chaubey
Keyword(s):  
Gamma Ray ◽  
Specific Activity ◽  
Absorbed Dose ◽  
Mean Value ◽  
Radiation Hazard ◽  
Mean Values ◽  
Activity Concentrations ◽  
The World ◽  
Health Related ◽  
The Mean

Abstract Background & Methodology : The specific activity concentration of naturally occurring radionuclides 226Ra, 232Th, 40K and their health related effects were determined in different environmental samples(gemstones) collected from Delanta-Dawunt. Which is one of the mining place in Ethiopia to extract mainly opals (gemstones). Sample collection and the gamma spectroscopic analysis followed the recommended international procedures for such type of research. Gamma-ray spectrometry was applied using HPGe gamma-ray detector and PC-based MCA. The Purpose of this research: to determine the activity concentrations of the radionuclides U/Th series and K of gemstones(opals), to determine life time cancer risk of radionuclide in the environment , to assess the hazard and risk to the public associated with these dose values , to conduct the geochemical studies by quantifying the levels of trace gemstones as well as the physical parameters in soil samples within and around it, and To determine the radiation doses from these activity concentrations and compare with international recommended dose limits. Results: The results of the activity concentration on our research work showed significant variations from 11.97 ± 2.46 to 62.44 ± 14.99 Bq kg-1 for 226Ra, 25.69 ± 3.69 to 137.84 ± 13.23 Bq kg-1 for 232Th and 184.84 ± 3.59 to 969.56 ±18.16 Bq kg-1 for 40K. The mean radioactivity concentration of 226Ra, 232Th, and 40K was found to be around 29.84 ± 6.53, 68.44 ± 18.94, 390.87 ± 6.09 Bk kg-1 respectively. Conculsion: The mean values of Radium equivalent activity (Raeq), absorbed dose, annual effective dose equivalent, external and internal radiation hazard (Hex and Hin) index ,and activity utilization index is 151.68±19.46 Bq kg-1, 72.19 ± 8.48 nGy h-1, 0.07 ± 0.01mSv y-1,0.43, 0.51, 0.57 ± 0.08 and 0.29 ± 0.03 respectively. The specific activity of 232Th is higher than the world mean value and 40K is the same as the world mean value. The radiation hazard indices, ELCR values found in this study are lower than the world mean values. However, the absorbed dose is higher than the world means value. This is due to the reason of high thorium concentration existence and opal mining is highly explored on such study areas.

scholarly journals Measurement of Natural and Artificial Radioactive Elements in Soil  at the Southern Al-Dora Region, Baghdad Governorate, Iraq: حساب تركيز النظائر المشعة الطبيعية والصناعية لنماذج تربة جنوب منطقة الدورة  في محافظة بغداد، العراق

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
Basim Khalaf Rejah, Afrah Hassoon Oraibi, Abdalrahman Al-Sal
Keyword(s):  
Gamma Ray ◽  
Specific Activity ◽  
Absorbed Dose ◽  
Radiological Hazard ◽  
Radioactive Elements ◽  
Hazard Indices ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
Gamma Ray Detector ◽  
Radiological Hazard Indices

The specific activity of natural and artificial radioactive elements in nine soil samples at different locations of southern Al-Dora region, Baghdad governorate, Iraq were measured and analysed by using a gamma ray detector NaI (Tl). The average activity concentrations of 238U, 232Th, 40K and 137Cs are found to be 38.22 Bq/Kg, 42.99 Bq/Kg, 16.64 Bq/Kg and 2.92 Bq/Kg, respectively. Several radiological hazard indices including radium equivalent activity (Raeq), absorbed dose rate (D), internal (Hin) and external (Hex) hazard indices, internal (AEDEin) and external (AEDEex) annual effective dose equivalent and gamma ray index (Iγr) are calculated. The findings of all radiological hazard indices are lower than their international values. This study discloses that most locations in study area are safe from any radiological risks.

An interactive gamma-ray burst educational text for the world wide-web

1996 ◽  
Author(s):  
John M. Horack ◽  
Sherene Rizvi ◽  
Labraunna Friend
Keyword(s):  
World Wide Web ◽  
World Wide ◽  
Gamma Ray ◽  
Gamma Ray Burst ◽  
The World

scholarly journals Comparative Study of Natural Radioactivity and Radiological Hazard Parameters of Various Imported Tiles Used for Decoration in Sudan

Symmetry ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 746 ◽  
Author(s):  
Saifeldin Siddeeg ◽  
Mohamed Suliman ◽  
Faouzi Ben Rebah ◽  
Wissem Mnif ◽  
Amel Ahmed ◽  
...  
Keyword(s):  
Natural Radioactivity ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Ceramic Materials ◽  
Radiological Hazard ◽  
Absorbed Dose Rate ◽  
Mean Values ◽  
Activity Concentrations ◽  
Materials Used ◽  
Hazard Parameters

Various commercially imported ceramic materials used in the building of Sudanese dwellings were examined in order to determine their natural radioactivity and radiological hazard parameters. In this context, twenty-five different consignments were sampled and analyzed using (3″ × 3″) sodium iodide gamma spectrometry system NaI(Tl). The identified average activity concentrations of 238U, 232Th, and 40K were 183 ± 70, 51 ± 44, and 238 ± 77 Bq/kg dry-weights, respectively. A positive correlation between 238U and 232Th in the investigated samples was identified from the observed significant correlation (R2 = 0.8). Interestingly, a low Th/U ratio (~0.3) was recorded, which could be related to the systematic loss of thorium during the fabrication process. The measured activity concentrations for these radionuclides were comparable with the reported data obtained from similar materials used in other countries showing similarity in ceramic materials used in buildings. Five different radiation indices, such as the average radium equivalent (Raeq), the absorbed dose rate (D), the annual effective dose equivalent (AEDE), the external hazard index (Hex), and the radioactivity level index (lγ), which indicate hazardous radiation, were estimated from these measurements. The obtained results revealed average values of 274 ± 106 Bq/kg, 125 ± 48 nGy/h, 1.23 ± 0.48 mSv/y, 0.74 ± 0.29, and 0.94 ± 0.37, for Raeq, D, AEDE, Hex, and lγ, respectively. The mean values of Raeq and Hex were in good agreement with the international limits, while the means of D and lγ were higher than the universal values. Calculated AEDE in about 60% of the samples exceeded the universal limit of 1 mSv/y for the public exposure (maximum value of 2.16 mSv/y). The investigated parameters were in the same range for the majority of imported samples; however, they were slightly higher than the locally produced ceramic, highlighting the importance of monitoring imported materials for their radioactivity contents.

scholarly journals Some Aspects of the Geochemistry and Natural Radioactivity of the Azov Deposit Ores

2021 ◽  
pp. 25-35
Author(s):  
E.М. Sheremet ◽  
◽  
I.Yu. Nikolaev ◽  
L.D. Sietaia ◽  
S.М. Strekozov ◽  
...  
Keyword(s):  
Rare Earth ◽  
Natural Radioactivity ◽  
Gamma Ray ◽  
Specific Activity ◽  
Gamma Activity ◽  
Zro2 Content ◽  
Γ Radiation ◽  
Processing And Storage ◽  
And Storage ◽  
Enclosing Rocks

The analysis of the Azov deposit of zirconium-rare earth ores as the object capable on qualitative and quantitative parameters to become key for creation and modernization of rare earth subsectors of the industry of Ukraine is carried out. On the basis of the generalized characteristics of zirconium-rare earth mineralization, conclusions were drawn regarding the nature of the increased radioactivity at the Azov deposit, which is mainly due to the presence of certain minerals in the ores. The actual radioactive minerals were found only as inclusions in zircon and do not make a significant contribution to the natural radioactivity of ores. It has been established that the radioactivity is uranium-thorium due to the inclusion of these elements in the composition of the aforementioned minerals. The results of the radiation-hygienic assessment of core samples from the deposit are presented. According to the existing standards, the enclosing rocks of the supra-ore and under-ore strata can be used in all types of construction without restrictions. The ores of the deposit are assigned to the third class in terms of the level of effective specific activity. It was found that there is a significant direct relationship between gamma activity and the total REE content in the field. There is also a correlation between the content of U and Th, the dose rate of γ-radiation and the content of the total REE. It was shown that there is no relationship between these indicators and the ZrO2 content. Analysis of the gamma-ray logs showed the possibility of confidently drawing the boundaries of the ore intervals and fixing the inter-ore intervals. The main stages of the technological process of integrated development, enrichment, processing and storage of enrichment tailings, slags and sludge, which ensure the minimum impact of production on the environment and human health, have been determined.

Specific Activity and Radioactive Contour Map of Anthropogenic Radionuclide (137Cs) in Surface Soil Samples from Chumphon Province, Thailand

2013 ◽  
Vol 770 ◽  
pp. 108-111
Author(s):  
Sutthinee Chauymanee ◽  
Prasong Kessaratikoon ◽  
Ruthairat Boonkrongcheep ◽  
Supphawut Benjakul ◽  
Udorn Youngchauy
Keyword(s):  
Gamma Ray ◽  
Surface Soil ◽  
Specific Activity ◽  
Soil Samples ◽  
The South ◽  
Mean Values ◽  
Anthropogenic Radionuclide ◽  
Spectrometry Analysis ◽  
Contour Maps ◽  
Specific Activities

Specific activities of anthropogenic radionuclide (137Cs) were studied and determined in 132 surface soil samples collected from 8 districts in Chumphon province in the south of Thailand. A high resolution high-purity germanium (HPGe) detector with a massive lead shield and gamma spectrometry analysis system were employed to measure the gamma ray energy spectra from the samples. The specific activity of 137Cs in all of surface soil samples were analyzed by using the IAEA/SL-2 radioactive standard source. It was found that the specific activities of 137Cs ranged from < 0.33 4.43 Bq/kg with mean values of 2.30 ± 1.38 Bq/kg. The experimental results were also compared with research data in the south of Thailand (2009 2012), Office of Atoms for Peace (OAP) annual report data and global radioactivity measurement and evaluations. The data can be also used to create the radioactive contour maps of the investigated area.

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