scholarly journals Radiation hazard of solid metallic tailings in Shangluo, China

2016 ◽  
Vol 31 (2) ◽  
pp. 190-194 ◽  
Author(s):  
Sukai Zhuang ◽  
Xinwei Lu ◽  
Jiantao Li ◽  
Qian Li
Keyword(s):  
Building Materials ◽  
Gamma Ray ◽  
Hazard Index ◽  
Weighted Average ◽  
Absorbed Dose ◽  
Radiation Hazard ◽  
Gamma Ray Spectrometry ◽  
World Population ◽  
Absorbed Dose Rate ◽  
Hazard Indexes

The radiation hazards of five kinds of different solid metallic tailings collected from Shangluo, China were determined on the basis of natural radioactivity measurements using low background multichannel gamma ray spectrometry. The activity concentration of 226Ra, 232Th and 40K in the tailings ranged from 5.1 to 204.3, 3.8 to 28.5, and 289.6 to 762.3 Bq/kg, respectively. The radium equivalent activities and the external hazard indexes of all studied metallic tailings were below the internationally accepted value of 370 Bq/kg and unity, respectively. The internal hazard index of vanadium tailings exceeded unity, while the internal hazard indexes of other analyzed metallic tailings were less than unity. The indoor air absorbed dose rate values for all studied metallic tailings except lead-zinc tailings and gold tailings were higher than the world population-weighted average of 84 nGy/h and the annual effective dose values of all metallic tailings except for vanadium tailings were lower than 1 mSv. The study showed that vanadium tailings present a radiation hazard and their usage as building materials should be restricted.

scholarly journals Assessment of Natural Radioactivity and Radiation Hazard in Soil Samples of Rajbari District of Bangladesh

2013 ◽  
Vol 2 ◽  
pp. 1-8 ◽  
Author(s):  
R Khatun ◽  
AHM Saadat ◽  
MM Ahasan ◽  
S Akter
Keyword(s):  
Gamma Ray ◽  
Health Effect ◽  
Harmful Effect ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Radiation Hazard ◽  
Gamma Ray Spectrometry ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
The World

Rajbari district of Bangladesh, have been studied and possible health effect were estimated. The experiment has been done by using gamma ray spectrometry system consisting of a HPGe detector coupled with MCA and associate electronics. The average natural radioactivities of 238U, 232Th and 40K have been measured as 29.03±5.67 Bq/kg, 50.91±10.17 Bq/kg and 535.32±89.19 Bq/kg respectively. To estimate health effect due to the activity of those radionuclides, the radium equivalent activity (Raeq), external hazard index (Hex), absorbed dose rate (D) and effective dose have been calculated and compared to the world average values. The results are also compared with the literature values reported for other regions of the world and found that the soil of the study area are not hazards by the radiation and does not pose any harmful effect to the environment. The outcome of this study may provide valuable information about radiation hazard and also may take part in the monitoring of environmental radioactivity. Jahangirnagar University Environmental Bulletin, Vol.2, 1-8, 2013 DOI: http://dx.doi.org/10.3329/jueb.v2i0.16324

Assessment of natural radioactivity levels and the associated radiological hazards in some building materials from Mayo-Kebbi region, Chad

2018 ◽  
Vol 53 (4) ◽  
pp. 265-278 ◽  
Author(s):  
S. Penabei ◽  
D. Bongue ◽  
P. Maleka ◽  
T. Dlamini ◽  
Saïdou ◽  
...  
Keyword(s):  
Dose Rate ◽  
Natural Radioactivity ◽  
Building Materials ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Radiation Hazard ◽  
Absorbed Dose Rate ◽  
Activity Concentrations ◽  
Radiological Hazards ◽  
Radiation Hazard Index

In order to assess the levels of natural radioactivity and the associated radiological hazards in some building materials of the Mayo-Kebbi region (Chad), a total of nineteen samples were collected on the field. Using a high resolution γ-ray spectrometry system, the activity concentrations of radium (226Ra), thorium (232Th) and potassium (40K) in these samples have been determined. The measured average activity concentrations range from 0.56 ± 0.37 Bq kg−1 to 435 ± 7 Bq kg−1, 1.3 ± 0.6 Bq kg−1 to 50.6 ± 1.1 Bq kg−1 and 4.3 ± 2.0 Bq kg−1 to 840 ± 9 Bq kg−1, for 226Ra, 232Th and 40K, respectively. The highest 226Ra average activities is found in soil brick samples of Zabili. The highest mean value of 232Th and 40K concentrations are found in soil brick samples of Madajang. The activity concentration and the radium equivalent activity (Raeq) have been compared to other studies done elsewhere in the world. Their average values are lower than most of those of countries with which the comparison has been made. Were also evaluated, the external radiation hazard index, the internal radiation hazard index, the indoor air absorbed dose rate, the outdoor air absorbed dose rate, the activity utilization index, the annual effective dose, the annual gonadal dose equivalent, the representative level index, as well as, the excess lifetime cancer risk. In accordance with the criterion of the Organization for Economic Cooperation and Development, our results show that soil brick samples of Zabili and Madajang increases the risk of radiation exposure, thereby the possibility of developing cancer by people living in this environment. Based on these findings, brick samples from Zabili and Madajang are not recommended for construction purposes. All other sample materials have properties that are acceptable for use as building materials in terms of radiation hazard.

DETERMINATION OF RADON AND NATURAL RADIOACTIVITY CONCENTRATION IN SOME BUILDING MATERIALS USED IN IZMIR, TURKEY

2020 ◽  
Vol 15 (1) ◽  
pp. 107-118
Author(s):  
Daniel Hatungimana ◽  
Caner Taşköprü ◽  
Mutlu İçhedef ◽  
Müslim Murat Saç ◽  
Şemsi Yazıcı ◽  
...  
Keyword(s):  
Natural Radioactivity ◽  
Building Materials ◽  
Gamma Spectroscopy ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Radiation Hazard ◽  
Absorbed Dose Rate ◽  
Dose Rates ◽  
Activity Concentrations ◽  
Materials Used

ABSTRACT The aim of this study is to determine the radon and natural radioactivity concentrations of some building materials and to assess the radiation hazard associated with those mortar materials when they are used in the construction of dwellings. Radon measurements were realized by using LR-115 Type 2 solid state nuclear track detectors. Radon activity concentrations of these materials were found to vary between 130.00 ± 11.40 and 1604.06 ± 40.5 Bq m−3. The natural radioactivity in selected mortar materials was analyzed by using scintillation gamma spectroscopy. The activity concentrations for 226Ra, 232Th and 40K for the studied mortar materials ranged from ND to 48.5 ± 7.0 Bq kg−1, ND to 41.0 ± 6.4 Bq kg−1 and ND to 720.4 ± 26.8 Bq kg−1, respectively. Radium equivalent activities, external and internal hazard indexes, gamma and alpha indexes and absorbed gamma dose rates were calculated to assess the radiation hazard of the natural radioactivity in studied samples. The calculated Raeq values of all samples were found to be lower than the limit of 370 Bq kg−1 set for building materials. The estimated hazard index values were found to be under the unity and the absorbed dose rate values were also below the worldwide average of 84 nGy h−1.

ASSESSMENT OF NATURAL RADIOACTIVITY LEVELS AND RADIOLOGICAL HAZARDS IN BUILDING MATERIALS

2020 ◽  
Vol 188 (3) ◽  
pp. 316-321
Author(s):  
Fei Tuo ◽  
Xuan Peng ◽  
Qiang Zhou ◽  
Jing Zhang
Keyword(s):  
Building Materials ◽  
Gamma Ray ◽  
Absorbed Dose ◽  
Gamma Ray Spectrometry ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
Radiological Hazards ◽  
Radium Equivalent ◽  
Different Types ◽  
Radioactivity Levels

Abstract Radioactivity of 226Ra, 232Th, and 40K were measured in a total of 92 samples, including eight commonly used types of building materials that were obtained from local manufacturers and suppliers in Beijing. Concentrations were determined using high-purity germanium gamma-ray spectrometry. The 226Ra, 232Th, and 40K activity concentrations in all samples varied from 10.1 to 661, 3.3 to 555 and 3.2 to 2945 Bq per kg with an average of 127.8, 114.8, and 701.5 Bq per kg, respectively. The potential radiological hazards were estimated by calculating the absorbed dose rate (D), radium equivalent activity (Raeq), external hazard (Hex), and internal hazard (Hin) indices. The investigated building materials were classified into different types according to the radioactivity levels. Results from this research will provide a reference for the acquisition, sales, and use of building materials. Attention should be paid to the use of coal cinder brick, ceramic, and granite in the construction of dwellings.

scholarly journals Natural radioactivity level in materials used for medieval vaulting in the territory of the central Balkan region

2016 ◽  
Vol 31 (2) ◽  
pp. 184-189 ◽  
Author(s):  
Igor Bjelic ◽  
Dragana Todorovic ◽  
Jelena Krneta-Nikolic ◽  
Djordje Lazarevic ◽  
Koviljka Stankovic
Keyword(s):  
Natural Radioactivity ◽  
Building Materials ◽  
Gamma Ray ◽  
Health Hazard ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Balkan Peninsula ◽  
Gamma Ray Spectrometry ◽  
Balkan Region ◽  
Materials Used

This work presents the results of an investigation undertaken to determine the level of natural radioactivity in the traditional building materials used for medieval indoor vaulted constructions in the territory of the central Balkan region. Indoor radiation exposure varies appreciably if it comes from the earth building materials, hence the presence of natural radioisotopes of 226Ra, 232Th, and 40K in masonry vaulted constructions was analyzed using gamma ray spectrometry. In addition, the internal health hazard index, the absorbed dose rates and the effective annual doses were calculated. The results were then compared both with the reported data from the previous studies concerning the territory of the Balkan Peninsula, as well as with the worldwide values for the materials of historic buildings. The results obtained from the materials examined in this paper all showed the radioactivity levels below the maximum permitted values.

scholarly journals Natural Radioactivity Levels and Estimation of Radiation Exposure in Agricultural Soils from Skopje City Region

2020 ◽  
Vol 39 (1) ◽  
pp. 77 ◽  
Author(s):  
Aleksandra Angjeleska ◽  
Elizabeta Dimitrieska-Stojkovic ◽  
Zehra Hajrulai-Musliu ◽  
Radmila Črčeva-Nikolovska ◽  
Boško Boškovski
Keyword(s):  
Gamma Ray ◽  
Agricultural Soils ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Mean Value ◽  
Soil Samples ◽  
Radiation Hazard ◽  
City Region ◽  
Absorbed Dose Rate ◽  
Activity Concentrations

The aim of this study was to determine the activity concentrations of naturally occurring radioisotopes 226Ra, 232Th and 40K in 14 soil samples collected in the Skopje city surrounding, and to calculate the corresponding absorbed gamma dose rates. The radionuclides were measured applying a high purity Ge detector gamma-ray spectrometer with relative efficiency of 30 % at 1.33 MeV. The activity concentrations found in 14 soil samples varied in the range 24.1-41.9 Bq kg-1for 226Ra, 38.5-52.2 Bq kg-1 for 232Th, and 502-707 Bq kg-1 for40K. The mean radium equivalent (Raeq), for the area under investigation, was 143±16 Bq kg-1, while the outdoor radiation hazard index (Hex) was 0.39. The total absorbed dose rate due to three primordial radionuclides investigated lay in the range 55.3 - 79.0 nGy h-1 with mean value of 68.1±7.7 nGy h-1, yielding a total annual effective dose of (83.5±9.5) µSv y-1. The assessed radiological factors were lower than the recommended values, indicating low radiological health risk for the population living and working in the investigated area. The activity concentrations of radionuclides in soil samples were compared to the international values reported by United Nations Scientific Committee on the Effects of Atomic Radiation and previous studies on geographically close areas and some worldwide regions. 

scholarly journals Natural radioactivity of rocks from the historic Jeroným Mine in the Czech Republic

2021 ◽  
Vol 80 (18) ◽  
Author(s):  
Dariusz Malczewski ◽  
Maria Dziurowicz ◽  
Zdenek Kalab ◽  
Marketa Rösnerová
Keyword(s):  
Czech Republic ◽  
Natural Radioactivity ◽  
Building Materials ◽  
Gamma Ray ◽  
Hazard Index ◽  
Metal Extraction ◽  
Radiation Hazard ◽  
Gamma Ray Spectrometry ◽  
The Czech Republic ◽  
Activity Concentrations

AbstractThis study reports the natural radioactivity of characteristic rocks found in the historic Jeroným Mine of the Czech Republic as measured under the laboratory conditions. The rocks analyzed included granites and schists weathered to varying degrees and collected from different levels of the underground workings of the Jeroným Mine. The mine itself has been subject to metal extraction (mainly tin and tungsten) since the sixteenth century and has recently been developed as a cultural and scientific attraction open to the public. Activity concentrations of 40K, 232Th and 238U were measured from nine rock samples using gamma-ray spectrometry. The activity concentrations of 40K varied from 595 Bq kg−1 to 1244 Bq kg−1, while 232Th varied from 25 Bq kg−1 to 55 Bq kg−1. The activities associated with 238U ranged from 46 Bq kg−1 to 386 Bq kg−1. The measured activities were used to estimate two radiation hazard indices typically applied to building materials, the activity concentration index I and the external hazard index Hex. Mean respective values of 1.02 and 0.77 for I and Hex indicate that the rocks found in the Jeroným Mine meet radiological safety standards for building materials and do not pose a risk to potential tourists and staff.

Natural Radioactivity of Rocks from the Historic Jeroným Mine in the Czech Republic

2021 ◽  
Author(s):  
Dariusz Malczewski ◽  
Maria Dziurowicz ◽  
Zdenek Kalab ◽  
Marketa Rosnerova
Keyword(s):  
Czech Republic ◽  
Natural Radioactivity ◽  
Building Materials ◽  
Gamma Ray ◽  
Hazard Index ◽  
Metal Extraction ◽  
Radiation Hazard ◽  
Gamma Ray Spectrometry ◽  
The Czech Republic ◽  
Activity Concentrations

Abstract This study reports the natural radioactivity of characteristic rocks found in the historic Jeroným Mine of the Czech Republic as measured under the laboratory conditions. The rocks analyzed included granites and schists weathered to varying degrees and collected from different levels of the underground workings of the Jeroným Mine. The mine itself has been subject to metal extraction (mainly tin and tungsten) since the 16th century and has recently been developed as a cultural and scientific attraction open to the public. Activity concentrations of 40K, 232Th and 238U were measured from nine rock samples using gamma-ray spectrometry. The activity concentrations of 40K varied from 595 Bq kg− 1 to 1244 Bq kg− 1, while 232Th varied from 25 Bq kg− 1 to 55 Bq kg− 1. The activities associated with 238U ranged from 46 Bq kg− 1 to 386 Bq kg− 1. The measured activities were used to estimate two radiation hazard indices typically applied to building materials, the activity concentration index I and the external hazard index Hex. Mean respective values of 1.02 and 0.77 for I and Hex indicate that the rocks found in the Jeroným Mine meet radiological safety standards for building materials and do not pose a risk to potential tourists and staff.

scholarly journals Specific activities and radiation hazard parameters calculations of natural radionuclides in AL-Mustansiriyah university soils using NaI(Tl) detector

2019 ◽  
Vol 14 (30) ◽  
pp. 172-179
Author(s):  
Nada Farhan Kadhim
Keyword(s):  
Gamma Ray ◽  
Natural Radionuclides ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Soil Samples ◽  
Radiation Hazard ◽  
Absorbed Dose Rate ◽  
External Hazard Index ◽  
Specific Activities ◽  
Hazard Parameters

The specific activities of the natural radionuclides U-238 and Th-232 and K-40 in 14 soil samples collected from different sites fromAL-Mustansiriyah university at two depths (topsoil "surface" and20cm depth) were be investigated using gamma ray spectrometer3"x3" NaI(Tl) scintillation detector.The analysis of the energy spectra of the soil samples show thatthese samples have specific activities ranging with (16.08-51.11)Bq/kg for U-238, (14.79-52.29) Bq/kg for Th-232 and (191.08-377.64) Bq/kg for K-40, with an average values of 29.37, 34.14 and289.62 Bq/kg for U-238, Th-232, k-40 respectively. The radiationhazard parameters of the natural radionuclides; radium equivalentactivity (Raeq), gamma absorbed dose rate (Dγ), annual effective doserate (Eγ), internal and external hazard index (Hin, Hex) have also beencalculated. The maximum value of specific activities and hazardparameters was found in the sample of the soil gathered from theLiterature college center. All the calculated specific activates valueswere be in the ranges of worldwide averages, and below than theglobal permissible limits, this would indicate that the soils of theUniversity is safety for both students and staff.

Distribution of natural radioactivity and radiological hazard using a NaI(Tl) gamma-ray spectrometric system

2016 ◽  
Vol 40 (4) ◽  
pp. 324-333
Author(s):  
M Abu Shayeb ◽  
A Majid ◽  
S Zobidi
Keyword(s):  
Gamma Ray ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Gamma Ray Spectrometry ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
Naturally Occurring ◽  
Naturally Occurring Radionuclides ◽  
Radium Equivalent ◽  
Spectrometric System

The concentrations of 226Ra, 232Th, and 40K are measured in the material collected from two locations. The collected materials are analyzed using gamma-ray spectrometry. The activity concentration of the naturally occurring radionuclides 226Ra, 232Th, and 40K in building material varies from 12.6 to 121.4, 13.6 to 142, and 69.5 to 620.6 Bq kg−1, respectively. The radium equivalent activity, absorbed dose rate, annual effective dose, and hazard index are also calculated.

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