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 Measurements of Radon Concentrations and Dose Assessments in Physics Department-Science College-Al-Mustansiriyah University, Baghdad, Iraq

2015 ◽  
Vol 60 ◽  
pp. 83-93 ◽  
Author(s):  
Iman Tarik Al-Alawy ◽  
Haider Rayed Fadhil
Keyword(s):  
Effective Dose ◽  
Building Materials ◽  
Annual Effective Dose ◽  
Indoor Radon ◽  
Alpha Particles ◽  
Energy Concentration ◽  
Nuclear Track Detector ◽  
Average Value ◽  
Radon Gas ◽  
Physics Department

Measurements of radon gas concentrations with their progeny and the annual effective dose indoor the building of Al-Mustansiriyah University College of Science-Physics Department have been carried out by using time-integrated passive radon dosimeters solid state nuclear track detector CR-39 technique. The detectors with 1cm x1cm have been distributed over 70 places and suspended for sitting (1m) and standing (1.75m) positions in each location under study. The dosimetric measurements are made over a period of 90 days from 30 January 2014 to 30 April 2014. The calibration process has been done using radium-226 source with known activity radiation. It has found that the indoor radon gas concentrations varing from 37.488±6.123Bg/m3 to 58.670±7.660Bg/m3 with an average value 51.398±7.156Bg/m3 at 1m , and varing from 35.964±5.997Bg/m3 to 56.994±7.549Bg/m3 with an average value 47.057±6.847Bg/m3 at 1.75m which are within the worldwide limits 148Bg/m3 (EPA, 2003) and 200-300Bg/m3 (ICRP, 2009). The annual effective dose of the inhalation exposure to radon gas has been estimated and this vary from 0.394mSv/y to 0.617mSv/y with an average value 0.540mSv/y at 1m, and varing from 0.378mSv/y to 0.599mSv/y with an average value 0.495mSv/y at 1.75m which are within the worldwide permissible limist 3-10mSv/y (ICRP, 1993). The potential alpha energy concentration found to vary from 4.053mWL to 6.343mWL with an average value 5.557mWL at 1m and vary from 3.888mWL to 6.162mWL with an average value 5.087mWL at 1.75m which are less than the recommended value 53.33mWL (UNSCEAR, 1993). The lung cancer cases per million person per year vary from 7.093 to 11.101 per million person per year with an average value 9.725 per million person per year at 1m and vary from 6.805 to 10.784 per million person per year with an average value 8.904 per million person per year which are less than the recommended range 170-230 per million person per year (ICRP, 1993). The number of decays per-minute using swabs measurements technique have been used for selected units within two swabs from building materials walls for each unite, with area of 100cm2 using Ludlum 3030, the average of three swabs measurements have been calculated. Hence, the effectiveness of emitted alpha particles from the walls has been calculated to be varied from 0.00000 to 0.02222Bq/cm2 with an average value 0.01169Bq/cm2 at 1m and 0.01015Bq/cm2 at 1.75m respectevily which are within the permissible limit 0.04Bq/cm2 (Danial, 2010).

scholarly journals Measurement of radon gas concentration in water and soil samples in AL-Najaf governorate by using nuclear track detector (CR-39)

2015 ◽  
Vol 12 (3) ◽  
pp. 603-610
Author(s):  
Baghdad Science Journal
Keyword(s):  
Radon Concentration ◽  
Tap Water ◽  
Track Detector ◽  
Soil Samples ◽  
Exhalation Rate ◽  
Nuclear Track Detector ◽  
Gas Concentration ◽  
Average Value ◽  
Radon Gas

The radon gas concentration in environmental samples soil and water of selected regions in Al-Najaf governorate was measured by using alpha-emitters registrations which are emitted form radon gas in (CR-39) nuclear track detector. The first part is concerned with the determination of radon gas concentration in soil samples, results of measurements indicate that the highest average radon concentration in soil samples was found in (Al-Moalmen) region which was (100.0±7.0 Bq/m3), while the lowest average radon concentration was found in (Al-Askary) region which was (38.5±4.7 Bq/m3), with an average value of (64.23±14.9 Bq/m3) ,the results show that the radon gas concentrations in soil is below the allowed limit from (ICRP) agency which is (200 Bq/m3), while the radon exhalation rate (RER) ranged from (35.23-91.52 µBq/m2h), and average value which was (58.77±13.6 µBq/m2h). The second part is concerned with the determination of radon gas concentration in samples of tap water obtained from networks in dwellings in Al-Najaf governorate, the results indicate that the highest average radon concentration in water samples was found in (Meassan) region which was (0.59±0.08 Bq/L), while the lowest average radon concentration was found in (Al-Jamhorah) region which was (0.16±0.04 Bq/L), with an average value of (0.36±0.1 Bq/L), the present results show that the radon gas concentrations in tap water is below the allowed limit from (ICRP) agency which is (0.5994 Bq/L), while the radon exhalation rate (RER) ranged from (2.15-0.58 ?Sv/y), and average value which was (1.28±0.31 ?Sv/y).

scholarly journals INDOOR RADON-222 CONCENTRATION MEASUREMENTS AT FACULTY OF EDUCATION, YAFEA, ADEN UNIVERSITY, YEMEN, USING CR-39 NUCLEAR TRACK DETECTOR

2021 ◽  
Vol 2 (4) ◽  
pp. 161-168
Author(s):  
Anwar Khadher Mohammed ◽  
Mokhtar Salim Saleh Al_Salimi ◽  
M. I. Ahmed
Keyword(s):  
Lung Cancer ◽  
Relative Risk ◽  
Effective Dose ◽  
Radon Concentration ◽  
Annual Effective Dose ◽  
Indoor Radon ◽  
Exhalation Rate ◽  
Nuclear Track Detector ◽  
Average Value ◽  
Faculty Of Education

In this study, the activity concentration of indoor radon-222, annual effective dose, exhalation rate of radon, and relative risk of lung cancer are reported for different indoor buildings (students' dorms, teachers' dorms, offices, laboratories, library, lecture halls, and materials store) in Faculty of Education, Yafea, Aden University, Yemen. Sealed-can technique based on CR-39 nuclear tracks detector was distributed to radon gas survey. Twenty six radon detectors were mounted in seven buildings. The Radon measurements were performed for 90 days between December 2020 and March 2021. The results showed that the radon concentration ranges from 23,18 Bq m-3 to 66.49 Bq m-3 with an average value 35.86 Bq m-3, the annual effective dose ranges from 0.6 mSv y-1 to 1.639 mSv y-1 with an average value 0.979 mSv y-1, the exhalation rate ranges from 10.03 m Bq m-2 h-1 to 28.50 mBq m-2 h-1 with an average value 15.68 mBq m-2 h-1 and relative risk of lung cancer ranges from 1.02 to 1.06 with an average value 1.03. A strong correlation coefficient has been observed between radon concentration and radon exhalation rate. All of the values revealed in the study were of nominal state (that is less than allowed global values) and thus have no risk for the population living in these buildings.

scholarly journals Study on Radon Emanation from Selected Cement Samples by Using Nuclear Track Detector (Cr 39)

2014 ◽  
Vol 42 ◽  
pp. 45-50
Author(s):  
Khalid H. Abass ◽  
Ali Obies Muhsen Al Mayyali ◽  
Inaam H. Kadhim
Keyword(s):  
Radiation Protection ◽  
Track Detector ◽  
International Commission ◽  
Radon Emanation ◽  
Nuclear Track Detector ◽  
Gas Concentration ◽  
Alpha Emitters ◽  
Radon Gas

In this work, we have study the concentration of radon gas in seven cement samples from different regions in Iraq (Kofa, Sulaymaniya, Kubesa, Karbala, Al-Kaem, Basra, and Almas cement) by using alpha-emitters registrations that emitted from radon gas in CR-39 nuclear track detector. Sealed-cup technique that used in this study to determine the alpha emitters from radon gas. The results obtained shown that the highest average radon gas concentration in cement samples which was (55.16 Bq/m3) for Almas samples, while the lowest average radon gas concentration in cement samples which was (24.13 Bq/m3) for Karbala samples. The current results show that the radon gas concentration in all cement samples that studied is below the allowed limit from International Commission of Radiation Protection (ICRP) agency.

scholarly journals Measurements of radon, thoron and their progeny concentrations using twin cup dosimeter for indoor Al-Madaan city – Baghdad – Iraq

2019 ◽  
Vol 14 (30) ◽  
pp. 24-32 ◽  
Author(s):  
Shafik S. Shafik
Keyword(s):  
Lung Cancer ◽  
Effective Dose ◽  
Radon Concentration ◽  
Annual Effective Dose ◽  
Indoor Radon ◽  
Health Hazard ◽  
Health Hazards ◽  
Radon Progeny ◽  
Average Value ◽  
Activity Concentrations

In this study, the activity concentrations of indoor radon, thoronand their progeny have been measured in air for 61 differentlocations of Al-Maddan city using twin cup dosimeter. Furthermore,some useful parameters concerning the health hazards have beenestimated; working level month (WLM), annual effective dose (Eff),and excess lung cancer per million person per year (ELC).The resultsshow that the values of radon gas levels in the investigated districtsvaried from 56.28 to 194.43Bq/m3with an overall average value132.96Bq/m3, while 0.313 to 1.085 for WLM with an overall average0.740, respectively. The value of Eff and ELC have been found tovary from 1.420 to 4.918 mSv/y with an overall average value3.354mSv/y, and 852 to 2951 with an overall average value 2013,respectively. For thoron gas only, the results showed that the thoronactivity concentration varied from 15.05 to 172.40 Bq/m3 with anoverall average 76.48 Bq/m3, and 0.021to 0.240for WLM with anoverall average 0.106, respectively. The values of Eff and ELC havebeen found to vary from 0.256 to 2.94 mSv/y with an overallaverage1.30 mSv/y and from 57 to 652 with an overall average of298, respectively. The concentration of radon progeny varied from59.44 to 301.39 Bq/m3 with an overall average 157.62 Bq/m3. Theresults illustrated that there is a large variation in the values of themeasured concentrations. This is due to the wide variation in theconstruction of the houses in Al-Madaan city. However, allinvestigated locations have radon concentration below the actionlevel (200-300Bq/m3) that recommended byICRP. Therefore, there isno health hazard of radon in the region of Al-Madaan city wheremeasurements have been performed.

scholarly journals Measurement of Soil-Gas Radon in Some Areasof Iraq Using Nuclear Track Detector CR-39

2015 ◽  
Vol 53 ◽  
pp. 90-94
Author(s):  
Khalid Haneen Abass ◽  
Baidaa Y. Mohammed ◽  
Azhar N. Rehem ◽  
Dalia J. Oleiwi
Keyword(s):  
Soil Sample ◽  
General Public ◽  
Track Detector ◽  
Soil Samples ◽  
Soil Gas ◽  
Nuclear Track Detector ◽  
Gas Concentration ◽  
Alpha Emitters ◽  
Radon Gas ◽  
Soil Gas Radon

The health hazards of the radioactive gas radon on general public are well known. In order to understand the level and distribution of 222Rn concentrations in soil-gas in Babil province, we have measured the radon gas concentration in soil samples of different areas in Babylon (Al-werdeiaa, Al-seiahy, Al-Thewrae, Al-muhendisen, Al-keliss, Nadeer) by using alpha-emitters registrations which are emitted from radon gas in nuclear track detector (CR-39). The obtained results have shown that the highest average radon gas concentration in soil sample was found in Al-muhendisen and Al-werdeiaa samples, which was (32.75 Bq/m3), while the lowest average radon gas concentration in soil samples was found in Nadeer sample, which was (25.85 Bq/m3). The present results show that the radon gas concentration in all soil samples is below the allowed limit from (International Commission of Radiation Protection) (ICRP) agency.

scholarly journals Radon concentration measurement in soil for some northen Iraqi's regions by using CR-39 detector

2009 ◽  
Vol 6 (3) ◽  
pp. 514-518
Author(s):  
Baghdad Science Journal
Keyword(s):  
Radon Concentration ◽  
Track Detector ◽  
Soil Samples ◽  
Concentration Measurement ◽  
Standard Samples ◽  
Gas Concentration ◽  
Alpha Emitters ◽  
Radon Gas ◽  
The North ◽  
North Part

Concentrations of radon were measured in this study for twenty-four samples of soil distributed in six locations on the north part of Iraq. The radon concentrations in soil samples measured by using alpha-emitters registration that emits from Radon (222Rn) in (CR-39) track detector. The concentrations values were calculated by a comparison with standard samples. The results shows that the radon gas concentrations in Darbandikhan City varies from (16.60-34.04 Bq/m3), Halabja City (16.51-23.32 Bq/m3), Al Sulaimaniya City (17.61-32.25 Bq/m3), Koisnjaq City (22.04-35.65 Bq/m3), Shaqlaua City (21.10-29.10 Bq/m3) and Erbil City (22.30-34.63 Bq/m3). The average radon gas concentration in Al Sulaimaniya and Erbil governorate are (22.30 Bq/m3) and (26.17 Bq/m3) respectively. As a conclusion from the study Radon concentration in governorate of Erbil is relatively higher than that in governorate of Al Sulaimaniya.

scholarly journals Assessment of dose due to exposure to indoor radon and thoron progeny

2010 ◽  
Vol 25 (3) ◽  
pp. 198-204
Author(s):  
Ganesh Prasad ◽  
Gurupad Gusain ◽  
Veena Joshi ◽  
Rakesh Ramola
Keyword(s):  
Effective Dose ◽  
Annual Effective Dose ◽  
Indoor Radon ◽  
Track Detector ◽  
Underground Mines ◽  
Radiation Hazard ◽  
Average Value ◽  
Decay Products ◽  
Total Radiation Dose ◽  
Thoron Progeny

The components of the effective dose through inhalation from radon and its progeny are important for human health since they contribute to more than 50% of the total radiation dose from natural sources. As a consequence, radon has been identified as the second leading cause of lung cancer after smoking. Radon and its short lived decay products (218Po, 214Pb, 214Bi, 214Po) present in dwellings are a radiation hazard, particularly if such sources are concentrated in the enclosed areas like poorly ventilated houses and underground mines. The indoor radon, thoron, and progeny concentrations were measured in a small hilly town of Budhakedar and the surrounding area of Tehri Garhwal, India, by using LR-115 Type II plastic track detector in a twin cup radon dosimeter. The concentrations of radon progeny were measured as the highest in winter and the lowest in summer while the thoron progeny concentration was found maximum in rainy season and minimum in autumn. The annual exposure to the potential alpha energy of radon and thoron were found to vary from 0.04 WLM to 0.69 WLM with an average value of 0.29 WLM, and 0.03 WLM to 0.37 WLM with an aver- age value of 0.16 WLM, respectively. The annual effective dose due to the exposure to indoor radon and progeny in Budhakedar homes was found to vary from 0.16 mSv to 2.72 mSv with an average value of 1.14 mSv and the effective dose due to the exposure to thoron and progeny was found to vary from 0.18 mSv to 2.49 mSv with an average value of 1.05 mSv. The results of systematic study have been obtained by considering the room as a space in which the radon and thoron levels are directly related to the dynamic and static parameters.

scholarly journals Radon concentration measurements in sludge of oil fields in North Oil Company (N.O.C.) of Iraq

2019 ◽  
Vol 13 (26) ◽  
pp. 139-145
Author(s):  
Basim Kh. Rejah
Keyword(s):  
Solid State ◽  
Effective Dose ◽  
Radon Concentration ◽  
Annual Effective Dose ◽  
Track Detector ◽  
Oil Fields ◽  
Energy Concentration ◽  
Nuclear Track Detector ◽  
Concentration Measurements ◽  
Oil Company

In this study the assessment radon concentration in sludge of OilFields in North Oil Company (N.O.C.) of Iraq have been studiedusing CR-39 solid–state nuclear track detector technique. A total of34 samples selected from 12 oil stations in the company have beenplaced in the dosimeters. The average radon concentration was foundto be 162.29 Bq/m3 which is fortunately lower than the standardinternational limit. The potential alpha energy concentration andannual effective dose have been calculated. A proportionalrelationship between the annual effective dose and radonconcentration within the studied region has been certified.

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