scholarly journals Penilaian Dampak Bahaya Radiologis terhadap Radionuklida Natural di Pesisir Pulau Bengkalis

2019 ◽  
Vol 18 (2) ◽  
pp. 113
Author(s):  
Murdahayu Makmur ◽  
Wahyu Retno Prihatiningsih ◽  
Mohamad Nur Yahya
Keyword(s):  
Dose Rate ◽  
Sampling Method ◽  
Natural Radionuclides ◽  
Hazard Index ◽  
Purposive Sampling ◽  
Average Value ◽  
External Hazard Index ◽  
226Ra Activity ◽  
Index Value ◽  
Radionuclide Activity

Latar belakang : Radionuklida natural ditemukan hampir di semua media lingkungan, dan di lingkungan laut terdeteksi cukup tinggi karena adanya proses erosi, pelapukan dan daur ulang mineralyang mengalami perpindahan melalui badan air. Radionuklida natural tersebutdapat berpindah ke berbagai media, termasuk ke manusia melalui rantai makanan.Penelitian ini dilakukan untuk memberikan informasi dasar mengenai tingkat radioaktivitas di lingkungan perairan laut di Pesisir Pulau Bengkalis dan melakukan penilaian dampak bahaya radiologis melalui aktivitas ekuivalen radium (Raeq) dan indeks bahaya eksternal (Hex)serta laju dosis eksternal dari radionuklida natural.Metode: Metode deskriptif digunakan dalam penelitian ini dan metode pengambilan sample sedimen menggunakan metode purposive sampling. Sampelsedimen dikumpulkan dari 6 titik pengambilan sampel di pesisir Pulau Bengkalis, menggunakan sediment grab. Sampel kemudian dikeringkan dan dihomogenkan kemudian ditimbang sebanyak 1 kg. Pengukuran aktivitas radionuklida dilakukan menggunakan spektrometri gama dengan waktu cacah selama 3 hari. Aktivitas 226Ra ditentukan berdasarkan emisi sinar gamma 214Pb dan 214Bi. Aktivtias 232Th ditentukan berdasarkan emisi 212Pb dan 228Ac dan 40K ditentukan dari emisi pada 1461,8 keV. Hasil analisis akan digunakan untuk menghitung dampak radiologis di lingkungan mengunakan ekuivalen aktivitas radium dan indeks bahaya eksternal.Hasil: Aktivitas rata-rata berturut turut 56,45 ; 31,34 ; 26,04 ; 33,19 ; 30,00 dan 185,49 Bq/kg untuk radio nuklida226Ra, 212Pb, 214Pb, 214Bi, 228Ac dan 40K. Aktivitas terukur mempunyai kisaran nilai yang berdekatan dengan pengukuran di beberapa negara.Penghitungan nilai aktivitas ekuivalen radium (Raeq) berkisar dari 82,61 - 138 Bq/kg dan tidak melebihi nilai yang ditetapkan oleh ICRP (1990) dan OECD (179) yaitu sebesar 370 Bq/kg. Nilai indeks bahaya eksternal (Hex) masih dibawah 1, dengan nilai rata rata sebesar 0,31, dan laju dosis dari radionuklida natural sebesar 37,175 nGy/h.Simpulan:Aktivitas radionuklida natural di pesisirPulauBengkalismempunyai kisaran nilai yang berdekatan dengan pengukuran di beberapa Negara. Nilai aktivitas ekuivalen radium (Raeq) Yang terukur tidak melebihi nilai yang ditetapkan oleh ICRP (1990) dan OECD (179).  Nilai indeks bahaya eksternal (Hex) masih dibawah 1, dan laju dosis yang diserap lingkungan dari radionuklida natural masih dibawah nilai rata rata dunia. Dengan demikian, dapat disimpulkan bahwa parameter radiologis radionuklida natural dalam sedimen di pesisir Pulau Bengkalis berada dalam batas yang dapat diterima. AbstractTitle : --Background: Natural radionuclides are found in almost all environmental media, and in the marine compartment have been detected relative high due to the process of erosion, weathering and recycling of minerals that come trough the water bodies. Radionuclides can move to various media, including to the humans through the food chain. This research was conducted to provide baseline information about the activity of radioactivity in the marine environment of the Bengkalis Island Coast and conduct radiological hazard impact assessments through equivalent radium (Raeq) and external hazard index (Hex) and external dose rates of natural radionuclides.Method: Descriptive methods were used in this study and the sediment sampling method used a purposive sampling method. Sediment samples were collected from 6 sampling points on the coast of Bengkalis Island, using sediment grab. The samples were then dried, homogenized and weighed 1 kg. Measurement of radionuclide activity was carried out using gamma spectrometry with counting time for 3 days. The 226Ra activity is determined based on 214Pb and 214Bi gamma ray emissions. The 232Th activity was determined based on 212Pb and 228Ac and 40K emissions determined from emissions at 1461.8 keV. The results of the analysis will be used to calculate the radiological impact in the environment using equivalent radium activity and external hazard index.Results: The average activity are 56.45; 31.34; 26.04; 33.19; 30.00 and 185.49 Bq/kg for radionuclides 226Ra, 212Pb, 214Pb, 214Bi, 228Ac and 40K respectively. The value of this activity comparable withthe activities in several countries.The calculation of radium equivalent activity (Raeq) values ranges from 82.61 - 138 Bq / kg and does not exceed the value 370 Bq / kg by ICRP (1990) and OECD (179). The external hazard index value (Hex) is still below 1, with an average value of 0.31, and the dose rate of natural radionuclides is 37,175 nGy / h.Conclusion: Natural radionuclide activity on the coast of Bengkalis Island has a range of values adjacent to measurements in several countries. The measured value of radium (Raeq) activity does not exceed the value set by ICRP (1990) and OECD (179). The external hazard index value (Hex) is still below 1, and the absorbed dose rate of natural radionuclides is still below the world average value. Thus, it can be concluded that the radiological parameters of natural radionuclides in sediments on the coast of Bengkalis Island are within acceptable limits. 

Mapping Ground Exposure Rate and External Hazard Index in Part of Basement Complex Rock of North Central Nigeria

2020 ◽  
Vol 1 (5) ◽  
Author(s):  
Bello Y. Idi ◽  
Lazarus G. Ndatuwong
Keyword(s):  
Dose Rate ◽  
Survey Data ◽  
Hazard Index ◽  
Ground Level ◽  
Basement Complex ◽  
Average Value ◽  
External Hazard Index ◽  
Global Trend ◽  
Ground Level Concentration ◽  
Map Series

In this work, a preprocessed aero radiometric survey data of geologic survey map series of Nigeria basement complex sheet 145 was used to map the spatial distribution of ground level concentration of the three radioelements that contribute significantly to the emission of gamma rays, notably potassium (40K), thorium (232Th) and uranium (238U) and estimating the external hazard associated with human exposure due to the elements. The elemental average concentrations of 40K, 232Th and 238U obtained from the survey data are 1.37485%, 24.5297ppm and 5.5491ppm respectively. The relative concentrations of the three elements are in line with the global trend where Th records the highest mean concentration, followed by U with then K recording the least. Except for K, the values of the other elements were found to be above the global crustal abundance ranges of 2 - 2.5% for 40K, 8 – 12 ppm for 232Th and 2 – 3 ppm for 238U. The mean ground level external dose rate was found to be 213.2 ±21.2 nGyh-1. This is about four times higher than the global average terrestrial dose rate of 55 nGyh-1. The computed external hazard index however gives an average value of 0.329, which is within the acceptable limit (<1). External hazard index above this limit were however recorded at three points, spanning a small area of about 0.096 km2. In situ and ground geophysical measurements are therefore

NATURAL RADIOACTIVITY AND EVALUATION OF RADIATION HAZARDS IN SOILS FROM GRANITOIDE-GRANITE GEOLOGICAL FORMATION IN CUBA

2018 ◽  
Vol 184 (1) ◽  
pp. 5-11
Author(s):  
C M Alonso-Hernández ◽  
A L Toledo-Sibello ◽  
A Guillén-Arruebarrena ◽  
R Sibello-Hernández ◽  
Y Morera-Gómez ◽  
...  
Keyword(s):  
Dose Rate ◽  
Natural Radioactivity ◽  
Background Radiation ◽  
Natural Radionuclides ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
Radiation Hazards ◽  
External Hazard Index

Abstract The natural radioactivity and the associated radiation hazards of soils from the Cumanayagua Granitoide-Granitic massif in the central south of Cuba have been studied. Mass activities of the natural radionuclides 238U, 232Th and 40K varied in the ranges 10.4–33, 4.6–21.7 and 381–1201 Bq kg−1, respectively. The radium equivalent activity (91.4 ± 22.1 Bq kg−1), absorbed dose rate (45.6 ± 11.1 nGy h−1), annual effective dose rate (56.1 ± 13.7 μSv y−1) and the external hazard index (0.25 ± 0.06) have been calculated and compared with the internationally approved values. According to these results, the area can be regarded as an area with normal natural background radiation and may not pose radiological risks to the inhabitants owing to harmful effects of ionizing radiation from the natural radionuclides in soils. This study provides background radioactivity concentrations in Cumanayagua Granitoide area and generate a baseline data for radiological mapping of Cuba in the future.

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.

Significance of Uranium Series Disequilibrium and Their Radiological Impacts In Abu Garadi Altered Granites.

2021 ◽  
Author(s):  
Mahmoud A. Hussein ◽  
Mahmoud khattab ◽  
Waleed A. El-Said ◽  
Neveen S. Abed ◽  
A. F. Tawfic
Keyword(s):  
Dose Rate ◽  
Hazard Index ◽  
Germanium Detector ◽  
Reduction Zone ◽  
Lifetime Cancer Risk ◽  
External Hazard Index ◽  
Activity Concentrations ◽  
Oxidation Reduction ◽  
Gamma Index ◽  
Radium Equivalent

Abstract Radioactivity of U, Th series and 40K in the collected samples from Abu Garadi area were measured using Hyper Pure Germanium detector Gamma spectrometer (HPGe). 232Th, 226Ra, 40K and 238U contents were determined in the different samples that indicating high uranium high thorium type of these granites. The activity concentrations of 232Th, 238U, 234U/238U activity ratio of the studied altered granites ranged between 1.98 to 4.25 with 2.89 as an average, indicating that the samples passed from the incipience of the oxidation-reduction zone (234U/238U=1.98) to the reduction zone (234U/238U= 4.52). 238U/235U activity ratios showed broad range as a result of the alteration processes. 226Ra and 40K are very important in determination of different environmental hazard impacts. The activity concentrations average of 238U, 232Th, 226Ra and 40K were 6553.7 ± 3.1 Bq kg− 1, 3944 ± 0.9 Bq kg− 1 201.3 ± 1.1 Bq kg− 1 and 619.4 ± 0.02 Bq kg− 1. The absorbed gamma dose rate (D), external hazard index (Hex), annual effective dose rate equivalent, radium equivalent (Raeq), internal hazard index (Hin), gamma index (Iγ) as well as Excess Lifetime Cancer Risk (ELCR) were applied based on the measured radionuclide concentration of the 238U, 232Th, 226Ra and 40K.

scholarly journals KESESUAIAN DAN DAYA DUKUNG EKOWISATA MANGROVE DI DESA KURAU DAN DESA KURAU BARAT KABUPATEN BANGKA TENGAH

2019 ◽  
Vol 13 (2) ◽  
pp. 94-104
Author(s):  
Meli Zulia ◽  
Okto Supratman ◽  
Suci Puspita Sari
Keyword(s):  
Carrying Capacity ◽  
Sampling Method ◽  
Secondary Data ◽  
Primary Data ◽  
Purposive Sampling ◽  
Mangrove Ecosystems ◽  
Suitability Index ◽  
Calculation Results ◽  
Index Value ◽  
Descriptive Method

ABSTRACT Mangrove ecosystems are one ecosystem that is vulnerable damaged. Mangrove ecotourism is one of the efforts that can do to reduce damage in the utilization of mangrove ecosystems.This study aims to calculate the suitability and carrying capacity of mangrove ecotourism in the  Kurau Village and West Kurau Village, Central Bangka Regency. This research was conducted in March 2019 at the Mangrove ecotourism area of ​​Kurau Village and West Kurau Village. The study location determined using a purposive sampling method consisting of 3 substations in one location to get primary data and secondary data. Descriptive method was used to analyze the Tourism Suitability Index (IKW) and the Regional Carrying Capacity (DDK). The calculation results show that the mangrove ecotourism area of ​​Kurau Village is included in the suitable category (S2) with a Suitability Index value is 74.36% and the Regional Carrying Capacity (DDK) is 44 people per day (10 hours  / day) and West Kurau Village is included in suitable category (S2) with a Suitability Index value of 74.36% and the Regional Carrying Capacity (DDK) is 55 people per day (10 hours open / day).

scholarly journals Analysis of natural radionuclides in coal, slag and ash in coal-fired power plants in Serbia

2011 ◽  
Vol 47 (2) ◽  
pp. 149-155 ◽  
Author(s):  
M.M. Jankovic ◽  
D.J. Todorovic ◽  
J.D. Nikolic
Keyword(s):  
Power Plants ◽  
Natural Radionuclides ◽  
Health Effect ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Coal Ash ◽  
Absorbed Dose Rate ◽  
External Hazard Index ◽  
Nikola Tesla ◽  
Coal Slag

The radioactivity monitoring in the ?Nikola Tesla?, ?Kolubara?, ?Morava? and ?Kostolac? coal-fired power plants was performed by the Radiation and Environmental Protection Laboratory, Vinca Institute of nuclear sciences in the period 2003-2010. Monitoring included the analysis of soil, water, flying ash, slag, coal and plants. This paper presents the results of the radioactivity analysis of coal, ash and slag samples. Naturally occurring radionuclides 226Ra, 232Th, 40K, 235U, 238U, and 210Pb as well as the man-made radionuclide 137Cs were determined by gamma spectrometry using HPGe detector. The concentrations of pairs of radionuclides were statistically tested to determine the correlation between them. Based on the obtained results, health effect due to the activity of these radionuclides was estimated via radium equivalent (Raeq), external hazard index (Hex), external gamma absorbed dose rate () and annual effective dose.

scholarly journals Natural Radioactivity Levels in Soil Samples of AL- Sadr and AL-Forat AL-Aosat Hospitals in Najaf

2018 ◽  
Vol 1 (1) ◽  
Keyword(s):  
Natural Radioactivity ◽  
Specific Activity ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Soil Samples ◽  
Absorbed Dose Rate ◽  
Average Value ◽  
Radiation Risks ◽  
External Hazard Index ◽  
Radium Equivalent

This work was undertaken with the purpose of measuring natural radioactivity, due to 238U, 232Th and 40K in 30 soil samples collected from two hospitals in the governorate of (AL-Najaf), in Iraq. The samples were distributed (15) samples per hospital, and Radiation risks were also calculated for all soil samples. The natural radioactivity was measured using NaI (Tl) detector, the results of the specific activity at the Al Sadr Hospital were 238U ranged from (5.89±0.36 to 21.38±0.69) (Bq/kg) with average value 12.60±0.51 (Bq/kg). 232Th from (0.44±0.06 to 14.67±0.37) (Bq/kg) with average value (4.46±0.19) (Bq/kg), and 40K from (252.14±2.54 to 478.24±3.50) (Bq/kg) with average value (346.95±289) (Bq/kg). AL-Forat AL-Aosat hospital results were 238U ranged from (0.69±0.12 to 27.63±0.74) (Bq/kg) with average value (12.84±0.51) (Bq/kg), 232Th from (1.47±0.11 to 9.3±0.31 (Bq/kg) with average value 6.19±0.24 (Bq/kg), and 40K from (192.88±2.27 to 338.52±3.08) (Bq/kg) with average value (254.29±2.54) (Bq/kg). The radiation risks calculated, Radium Equivalent (Raeq), external Hazard index (Hex), absorbed dose rate (ADr), total Annual Effective Dose Equivalent (AEDE), and the Excess Life Cancer Risk (ELCR). The results were for Al Sadr Hospital (45.7063(Bq/kg), 0.1234, 23.0648(nGy/h), 0.0283(mSV/y), 1.247439702×10-3) respectively. For AL-Forat AL-Aosat hospital were (41.2655 (Bq/kg), 0.111, 20.3772 (nGy/h), 0.0250(mSV/y)`, 1.102083688×10-3) respectively. The results in the two hospitals were compared with the global allowable values ratio within the permissible ranges specified by UNSCER, OCDE, and ICRP; we concluded that all the sites in this study are safe.

ANALISIS USAHA PEMBUATAN PUPUK ORGANIK CAIR DI DESA SRIWANGI KABUPATEN OKU TIMUR

2016 ◽  
Vol 1 (03) ◽  
pp. 1-6
Author(s):  
Wardi Saleh
Keyword(s):  
Production Process ◽  
Sampling Method ◽  
Organic Fertilizer ◽  
Average Income ◽  
Purposive Sampling ◽  
Average Value ◽  
Production Processes ◽  
Cow Urine ◽  
Fiscal Revenue ◽  
The Village

The purpose of this research were to : (1) Determine the revenue in the business of making a liquid organic fertilizer in the village of East OKU District Sriwangi, (2) Determine the feasibility of liquid organic fertilizer financially from cow urine in the village of East OKU District Sriwangi. This research was conducted in September 2014 through to the finish, with a purposive sampling method, and also take samples of cow urine-making business in the village of East OKU District Sriwangi The study found that the average fiscal revenue POC production of 358 bottles of USD 3.58 million / production process POC-making business Sriwangi In the village, the average income of the business of making POC is Rp 1,460,399 / production processes and the average value of production BEP is 32 bottles.

scholarly journals Environmental radioactivity in southern Serbia at locations where depleted uranium was used

2014 ◽  
Vol 65 (2) ◽  
pp. 189-197 ◽  
Author(s):  
Nataša B. Sarap ◽  
Marija M. Janković ◽  
Dragana J. Todorović ◽  
Jelena D. Nikolić ◽  
Milojko S. Kovačević
Keyword(s):  
Natural Radionuclides ◽  
Hazard Index ◽  
Depleted Uranium ◽  
Radium Equivalent Activity ◽  
Gross Alpha ◽  
External Hazard Index ◽  
Radionuclide Content ◽  
Radium Equivalent ◽  
Radioactivity Monitoring

AbstractIn the 1999 bombing of the Federal Republic of Yugoslavia, NATO forces used ammunition containing depleted uranium. The cleaning of depleted uranium that followed was performed in southern Serbia by the Vinča Institute of Nuclear Sciences between 2002 and 2007 at the locations of Pljačkovica, Borovac, Bratoselce, and Reljan. This paper presents detailed results of radioactivity monitoring four years after cleaning (2011), which included the determination of gamma emitters in soil, water, and plant samples, as well as gross alpha and beta activities in water samples. The gamma spectrometry results showed the presence of natural radionuclides 226Ra, 232Th, 40K, 235U, 238U, and the produced radionuclide 137Cs (from the Chernobyl accident). In order to evaluate the radiological hazard from soil, the radium equivalent activity, the gamma dose rate, the external hazard index, and the annual effective dose were calculated. Considering that a significant number of people inhabit the studied locations, the periodical monitoring of radionuclide content is vital.

Natural Radioactivity of Topsoil in Two Granite Areas of Guangzhou, South China

2014 ◽  
Vol 955-959 ◽  
pp. 3691-3695
Author(s):  
Gang Song ◽  
Min Xing Lu ◽  
Qiu Ping Zhu ◽  
Di Yun Chen ◽  
Yong Heng Chen
Keyword(s):  
Effective Dose ◽  
Annual Effective Dose ◽  
Natural Radionuclides ◽  
Hazard Index ◽  
Natural Radionuclide ◽  
Soil Samples ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity ◽  
External Hazard Index ◽  
Radium Equivalent

The natural radionuclide (238U, 226Ra, 232Th and 40K) concentrations in 152 soil samples were determined from two major granite areas in Guangzhou, using high resolution γ-ray spectroscopic system based on the characteristic spectral peaks. The mean activity values for 238U, 226Ra, 232Th and 40K were found to be 156.6±98.8, 160.9±96.5, 184.8±101.5 and 832.5±493.1 Bq kg–1 dry mass, respectively. The absorbed dose rate (D) calculated from activity concentration of 226Ra, 232Th and 40K ranged from 53.2 to 497.1 nGy h–1 with a mean of 220.7 nGy h–1. The Radium equivalent activity (Raeq), the outdoor annual effective dose and the external hazard index (Ir), which resulted from the natural radionuclides in soil, were also calculated and found to vary from 119.7 to 1117.2 Bq kg–1, from 0.07 to 0.61 mSv and from 0.33 to 3.07, respectively. The radium equivalent activities and the external hazard index in all the soil samples were same as 64.5% higher than the limit of 370 Bq kg–1 and 1.0, respectively. The outdoor annual effective dose was higher than the worldwide mean value of 0.07 mSv.

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