scholarly journals Assessment of the doses to the population of the regions of Russia from exposure to the cosmic radiation

2019 ◽  
Vol 12 (3) ◽  
pp. 78-83
Author(s):  
D. V. Kononenko ◽  
T. A. Kormanovskaya
Keyword(s):  
Effective Dose ◽  
Cosmic Radiation ◽  
Annual Effective Dose ◽  
Weighted Average ◽  
Dose Calculation ◽  
Average Value ◽  
Effective Doses ◽  
Refined Calculation ◽  
Average Individual ◽  
Regions Of Russia

The paper presents the results of a refined calculation of the average individual annual effective doses to the population of the regions of Russia from exposure to the cosmic radiation. The population-weighted average values of the altitude and latitude of the main settlements, which are home to at least 50 percent of the population of the region, were used as the altitude and latitude of the region. In addition, all settlements with a population of at least 20 thousand people were included in the calculation. Coverage of the population of the regions of Russia in the calculation varies from 50.1 to 95.8 percent (excluding three cities of Federal importance with 100 percent coverage) with the average value of 62.4 percent. The number of settlements included in the calculation in different regions ranges from 1 to 63. The methodology of the dose calculation is based on the approach described in the UNSCEAR 2000 Report. The obtained dose values for different regions range from 0.310 to 0.413 mSv. For Russia as a whole country, the population-weighted average individual annual effective dose from exposure to the cosmic radiation is 0.338 mSv.

MEASUREMENT OF THE ACTIVITY CONCENTRATIONS OF GAMMA EMITTING RADIONUCLIDES IN TOOTHPASTE SAMPLES AND ASSESSMENT OF THE CORRESPONDING ANNUAL EFFECTIVE DOSES

2021 ◽  
Author(s):  
Anas M Ababneh ◽  
Qutad M Samarah
Keyword(s):  
Effective Dose ◽  
Oral Hygiene ◽  
Annual Effective Dose ◽  
Daily Basis ◽  
Dose Assessment ◽  
Accidental Ingestion ◽  
Activity Concentrations ◽  
Effective Doses

Abstract It is inevitable that we are exposed to radiation daily from various sources and products that we consume on daily basis. The use of toothpaste for oral hygiene is one of the most common daily practices by humans and yet very little data are available regarding its radiation content. In this work, we investigated the concentrations of gamma emitting radionuclides in toothpaste samples consumed in Jordan. 40K and 226Ra were detected in almost one-third of the samples, whereas 228Ra was detected in nearly half of them. The corresponding activity concentrations in the detected samples were in the ranges of 68.7–154.2, 4.6–14.1 and 1.3–10.0 Bq/kg, respectively. Dose assessment of accidental ingestion of toothpaste for children and adults was made, and its contribution to the annual effective dose was found to be very minimal with maximum doses of ~2.9 and 1.3 μSv for children and adults, respectively.

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.

scholarly journals Measurement of Indoor Radon Gas Concentration in same Region of Baghdad Governorate Using CR-39 Nuclear Track Detector

2017 ◽  
Vol 14 (4) ◽  
pp. 688-691 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Effective Dose ◽  
Radon Concentration ◽  
Annual Effective Dose ◽  
Indoor Radon ◽  
Track Detector ◽  
Nuclear Track Detector ◽  
Gas Concentration ◽  
Alpha Emitters ◽  
Average Value ◽  
Radon Gas

In this research the activity of radon gas in air in Baghad governorate,Iraq, using “alpha-emitters track registration (CR-39) track detector were measured. This measurement was done for selected areas from Baghdad Governorate, The results obtained shows that the highest average concentrations for Rn-222 is (179.077 Bq/m^3) which was recorded within Al-Shaaib city and less average concentrations was (15.79 Bq/m^3) in the nearby residential area of Baghdad International Airport and the overall average concentrations is (86.508 Bq/m^3) for these regions. Then the radon concentration was measured annual effective dose calculated from radon concentration and found in range from 0.4031 mSv/y to 4.5179 mSv /y with an average value of 2.1824 mSv/y. The annual effective dose of radon was within the allowed international limits.

scholarly journals Specific Activities of Natural Radionuclides and Annual Effective Dose Due to the Intake of Some Types of Children Powdered Milk Available in Baghdad Markets

2017 ◽  
Vol 14 (3) ◽  
pp. 619-624
Author(s):  
Baghdad Science Journal
Keyword(s):  
Effective Dose ◽  
Sodium Iodide ◽  
Specific Activity ◽  
Annual Effective Dose ◽  
Natural Radionuclides ◽  
Mean Value ◽  
Powdered Milk ◽  
Effective Doses ◽  
The Mean ◽  
Specific Activities

In this research the specific activity of natural radionuclides 226Ra, 232Th and 40K were determined by sodium iodide enhanced by thallium NaI(TI) detector and assessed the annual effective dose in Dielac 1 and 2 and Nactalia 1 and 2 for children of less than 1 year which are available in Baghdad markets. The specific activity of 40K has the greater value in all the types which is in the range of allowed levels globally that suggested by UNSCEAR. The mean value of annual effective doses were 2.92, 4.005 and 1.6325 mSv/y for 226Ra, 232Th and 40K respectively.

Indoor Radon and Thoron Concentration and the Associated Effective Dose Rate Determination in Dwellings of Suq Alshouk, Thiqar (Iraq)

2021 ◽  
Vol 19 (12) ◽  
pp. 06-10
Author(s):  
Hussam Najem Abood ◽  
Ahmed Abbas Mohamed
Keyword(s):  
Effective Dose ◽  
Dose Rate ◽  
Annual Effective Dose ◽  
Indoor Radon ◽  
Type Ii ◽  
Average Value ◽  
Effective Dose Rate

Indoor radon/thoron concentration has been determined in some dwellings of Suq Alshouk district in Thiqar Governorate southern of Iraq, using LR-115 type II and CR-39 (SSNTDs). In this work the indoor radon/thoron concentration varies from (8-73) Bq m-3 for radon with an average 35±2Bq m-3, and ranges (1- 47) Bq m-3 for thoron with an average16±2Bq m-3. The average annual effective dose due to radon and thoron varies from 0.43-3.38m Sv y-1 with average value 1.43±0.11 mSv y-1.

OVERVIEW OF AIRCREW EXPOSURE TO COSMIC RADIATION IN THE CZECH REPUBLIC

2019 ◽  
Vol 186 (2-3) ◽  
pp. 211-214
Author(s):  
Ján Kubančák ◽  
Dagmar Kyselová ◽  
Ivan Kovář ◽  
Magdaléna Hlaváčová ◽  
Ronald Langer ◽  
...  
Keyword(s):  
Czech Republic ◽  
Effective Dose ◽  
Cosmic Radiation ◽  
Computer Code ◽  
Crew Member ◽  
Relative Uncertainty ◽  
The Czech Republic ◽  
Effective Doses ◽  
The Individual

Abstract Monitoring of exposures of aircrew members of airline operators registered in the Czech Republic has been performed since 1998. The individual effective doses are calculated using the computer code CARI annually. The calculations are based on information about participation of aircrew members on the specific flights and on the parameters describing the typical flight profiles of the flights; the latter is regularly verified with control measurements performed onboard aircraft. The results show that (1) the average annual effective doses in the period from 1998 to 2017 range from 1.3 to 2.1 mSv, (2) the maximum effective dose of a crew member is 5.7 mSv and (3) the annual collective effective doses range from 1.3 to 4.1 manSv. Combined relative uncertainty of the results is ~25%.

scholarly journals Measurement of radiation dose level within Queen Amina Hall, Ahmadu Bello University, Zaria

2020 ◽  
Vol 12 (1) ◽  
pp. 1-4
Author(s):  
Nuraddeen Nasiru Garba ◽  
Rabiu Nasiru ◽  
Muniba Sufiyan ◽  
Abdullahi Muhammad Vatsa
Keyword(s):  
Radiation Dose ◽  
Background Radiation ◽  
Annual Effective Dose ◽  
Environmental Radioactivity ◽  
Natural Background ◽  
Average Value ◽  
The World ◽  
Effective Doses ◽  
Dose Levels ◽  
Indoor And Outdoor

Measurement of background radiation is of great interest for it provides useful information in monitoring environmental radioactivity. The aim of the present study is to provide information and generate database on the natural background radiation dose levels of densely populated Queen Amina Hall, Ahmadu Bello University, Zaria. The radiation dose (outdoor and indoor dose rate) were measured at 29 rooms (Block 1- 4) and their compounds using RADOS survey meter held at 1m above the ground. The measured radiation dose ranged 0.13 nGyh-1 to 0.43 nGyh-1 and 0.54 nGyh-1 to 1.72 nGyh1 for indoor and outdoor respectively. Some of the high values recorded could be attributed due to the contribution of cosmic radiation emanating from the atmosphere as well as the geological settings of the location as there is no any artificial contributing factor within the area. The annual effective doses within the study area was found to be 0.01 mSvy-1 throughout which is quit below the world average value of 0.87 mSvy-1 for natural sources. Keywords: Radiation dose, Annual effective dose, RADOS meter, Queen Amina

THE INFLUENCE OF THE EQUILIBRIUM FACTOR ON THE ESTIMATED ANNUAL EFFECTIVE DOSE FROM INHALED RADON DECAY PRODUCTS IN SELECTED WORKPLACES

2020 ◽  
Vol 191 (2) ◽  
pp. 188-191
Author(s):  
Petr P S Otahal ◽  
Ivo Burian ◽  
Eliska Fialova ◽  
Josef Vosahlik
Keyword(s):  
Effective Dose ◽  
Activity Concentration ◽  
Annual Effective Dose ◽  
Radiological Protection ◽  
Equilibrium Factor ◽  
Decay Products ◽  
Water Treatment Plants ◽  
Radon Decay ◽  
Effective Doses ◽  
Dose Coefficients

Abstract Measurements of activity concentration of radon gas and radon decay products were carried out in several workplaces including schools, radium spas, swimming pools, water treatment plants, caves and former mines. Based on these measurements, annual effective doses to workers were estimated and values of the equilibrium factor, F, were calculated. This paper describes the different approaches used to estimate the annual effective dose based on the dose coefficients recommended by the International Commission on Radiological Protection. Using the measured F values as opposed to the default F value of 0.4 changed the doses by about 5–95% depending mainly upon the ventilation conditions of the workplace.

scholarly journals RISK ANALYSIS AND ANNUAL EFFECTIVE DOSE DUE TO TERRESTRIAL AND COSMIC RADIATION IN THE REGION OF NIĞDE PROVINCE (TURKEY)

2019 ◽  
Author(s):  
Mehmet Erdogan ◽  
Kaan Manisa ◽  
Hasan Bircan ◽  
İbrahim Çevik ◽  
Nesli Bingöldağ ◽  
...  
Keyword(s):  
Risk Analysis ◽  
Effective Dose ◽  
Cosmic Radiation ◽  
Annual Effective Dose

scholarly journals Review on the diagnosis and antibiotic therapy of otitis media in children

2020 ◽  
Vol 12 (1) ◽  
pp. 80-84
Author(s):  
S. Abdullahi ◽  
A.S. Ahmad ◽  
B. Abdulkadir ◽  
Y. Kabir ◽  
S. Mustapha ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Background Radiation ◽  
Annual Effective Dose ◽  
Environmental Radioactivity ◽  
Natural Background ◽  
Average Value ◽  
The World ◽  
Effective Doses ◽  
Dose Levels ◽  
Indoor And Outdoor

Measurement of background radiation is of great interest for it provides useful information in monitoring environmental radioactivity. The aim of the present study is to provide information and generate database on the natural background radiation dose levels of densely populated Queen Amina Hall, Ahmadu Bello University, Zaria. The radiation dose (outdoor and indoor dose rate) were measured at 29 rooms (Block 1- 4) and their compounds using RADOS survey meter held at 1m above the ground. The measured radiation dose ranged 0.13 nGyh-1 to 0.43 nGyh-1 and 0.54 nGyh-1 to 1.72 nGyh-1 1 for indoor and outdoor respectively. Some of the high values recorded could be attributed due to the contribution of cosmic radiation emanating from the atmosphere as well as the geological settings of the location as there is no any artificial contributing factor within the area. The annual effective doses within the study area was found to be 0.01 mSvy-1 throughout which is quit below the world average value of 0.87 mSvy-1 for natural sources. Keywords: Radiation dose, Annual effective dose, RADOS meter, Queen Amina

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