scholarly journals Radon study around earthquake affected areas of Nepal

BIBECHANA ◽  
2021 ◽  
Vol 18 (2) ◽  
pp. 61-67
Author(s):  
Bipin Rijal ◽  
Nigam S. Silwal ◽  
Govinda Chaudhary ◽  
Pitamber Shrestha ◽  
Buddha R. Shah
Keyword(s):  
Solid State ◽  
Annual Effective Dose ◽  
Indoor Radon ◽  
Track Detector ◽  
Kathmandu Valley ◽  
Radiological Protection ◽  
Nuclear Track Detector ◽  
Lifetime Cancer Risk ◽  
Radiological Health ◽  
Radon Concentrations

Indoor radon concentrations were measured in dwellings of the earthquake-affected areas of Kathmandu valley, Gorkha, and Sindhupalchowk districts of Nepal using passive radon dosimeter LR115, a Solid State Nuclear Track Detector, SSNTD. The radon concentrations in dwellings of Kathmandu valley ranged from 11±6 Bq/m3 to 135±26 Bq/m3 with a mean of 67.63 Bq/m3. For  Gorkha, it ranged from 18±7 Bq/m3 to 363±65 Bq/m3 with an average of 104.64 Bq/m3 while minimum, maximum and average radon concentrations for Sindhupalchowk were 14±6 Bq/m3, 397±71 Bq/m3, and 78.46 Bq/m3 respectively. The average annual effective dose to the inhabitants of Kathmandu valley, Gorkha, and Sindhupalchowk districts was calculated as 1.46 mSv/y, 2.26 mSv/y, and 1.69 mSv/y respectively. These annual doses were well below the action level of 10 mSv/y recommended by the International Commission on Radiological Protection which implies no significant radiological health hazards. Also, Excess Lifetime Cancer Risk and Lungs Cancer Cases per year per million people were determined. BIBECHANA 18 (2) (2021) 61-67

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.

Radiological Parameters Due to Radon-222 in Soil Samples at Baghdad Governorate (Karakh), Iraq

2017 ◽  
Vol 60 (2) ◽  
pp. 72-78
Author(s):  
Ali Abid Abojassim ◽  
Ahmed Rahim Shltake ◽  
Laith Ahmed Najam
Keyword(s):  
Radon Concentration ◽  
Annual Effective Dose ◽  
Track Detector ◽  
Soil Samples ◽  
Reference Level ◽  
Nuclear Track Detector ◽  
Radium Content ◽  
Can Technique ◽  
Level 3 ◽  
Radon Concentrations

Measurements of radon concentration, effective radium content, potential alpha energyconcentration (PAEC) and annual effective dose (AED) were estimated for soil samples in fifteen locationsof the Baghdad governorate (Karakh) in the central part of Iraq. In this survey we used the can technique,containing nuclear track detector (CR-39). The obtained values of radon concentration measurements weregenerally low, ranging from 38.12±13.46 to 94.51±16.5 Bq/m3, with an average 66.07 Bq/m3, while theeffective radium content varied from 5.80±0.21 Bq/kg to 14.39±0.33 Bq/kg with an average 10.09 Bq/kg. The average of the PAEC and AED were assessed to be 7.14 mWL 1.66 mSv/y, respectively. The resultsof the present study shows that the radium content are lower than the allowed limit reported by Organizationfor Economic Cooperation and Development (OECD) that is equal to 370 Bq/kg. In general, it is seen thatthe AED limit was within the recommended reference level (3 mSv/y to 10 mSv/y) of the World HealthOrganization. Also, it is found that there is a strong correlation (R2= 1) between radon concentrations andeffective radium content. The results obtained from this study indicate that the locations of Karakh hasbackground radioactivity(radon concentrations) levels within the natural limits.

scholarly journals Measurement of indoor radon concentrations in different dwellings in Arar, Saudi Arabia

2018 ◽  
Vol 33 (3) ◽  
pp. 293-300
Author(s):  
Ayman Abdalla ◽  
Samy El-Gamal
Keyword(s):  
Annual Effective Dose ◽  
Indoor Radon ◽  
Geometric Mean ◽  
International Committee ◽  
Geometric Standard Deviation ◽  
Cancer Risks ◽  
Indoor Radon Concentration ◽  
Lifetime Cancer Risk ◽  
Average Value ◽  
Radon Concentrations

Indoor radon concentrations in 33 dwellings in Arar city were measured using a CR-39 detector. This work is the first in the region and was done to assess the health risks. The exposure time was about 4 months, from May to September 2017. It was found that the indoor radon concentration changed in the range from 7.7 to 89.1 Bqm-3 with an overall average of 44.05 ? 6.21 Bqm-3 while the geometric mean is 39.51 Bqm-3 with a geometric standard deviation of 1.67. These values are within the acceptable level set by the International Committee for Radiation Protection. The annual effective dose received by the population of Arar was reported and it varied in the range 0.16 -1.82 mSv with an average value of 0.9 ? 0.16 mSv and the geometric mean is 0.81 mSv. The exposure to radon progeny was studied where the minimum, maximum, average, and geometric mean of exposure are 0.83?10-3, 9.63?10-3, 4.76 ? 0.67? 10-3 and 5.05?10-3 WLM, respectively. Finally, for the estimation of cancer risks, the excess lifetime cancer risk was investigated. Its average value was 3.7?10-3 which is relatively higher.

Estimating Radon Excess Lung Cancer at the Babylon Cement Plant in Iraq

2021 ◽  
Author(s):  
Israa Kamil Ahmed ◽  
Hyam Nazmy Khalaf ◽  
Mostafa Yuness Mostafa
Keyword(s):  
Lung Cancer ◽  
Effective Dose ◽  
Annual Effective Dose ◽  
Uranium Content ◽  
Mean Value ◽  
Track Detector ◽  
Soil Samples ◽  
Cement Plant ◽  
Nuclear Track Detector ◽  
Radon Concentrations

Abstract In the present work, Radon Excess Lung Cancer (ELC) is estimated for fourteen soil samples from Babylon cement plant in Iraq. CR-39 nuclear track detector is utilized to measure the uranium content and radon 222Rn concentrations in soil samples. Uranium concentrations in soil samples varied from 0.008 to 0.05 ppm with mean value 0.025±0.013. Radon concentrations is founded between 31 and 92 Bq/m3 with mean value 56.72 and standard division, SD, 17.29. Radon Excess Lung Cancer per Million Persons per Year is determined with mean value 863 and standard division, SD, 261.65 (463.81-12082.8). Also, Annual effective dose, E (msv y-1), has a range from 0.77 to 2.32 with mean 1.44 and SD 0.44.

scholarly journals Comparison of single and double entry twin cup dosimeter in measuring indoor radon and thoron concentration in Mizoram, India

2018 ◽  
Vol 18 (2) ◽  
pp. 58-63
Author(s):  
L.Z. Chhangte ◽  
P.C. Rohmingliana ◽  
B.K. Sahoo ◽  
B.K. Sapra ◽  
Vanramlawma ◽  
...  
Keyword(s):  
Solid State ◽  
Indoor Radon ◽  
Track Detector ◽  
Nuclear Track Detector ◽  
Single Entry ◽  
Construction Type ◽  
Double Entry ◽  
Seasonal Data

Indoor radon and thoron concentrations have been measured using solid state nuclear track detector (LR-115 type-ІІ) based twin cup dosimeter with single and double entry deployed side by side. The measurements have been carried out in 50 dwellings of 8 different villages/towns situated in Saiha and Lawngtlai districts, Mizoram. Dwellings were selected primarily from the gamma level measured using Micro-R survey meter and the construction type of the building. The average concentrations of radon and thoron were found to be 75.76 Bq/m3 and 96.50 Bq/m3 for single entry dosimeter and 63.47 Bq/m3 and 19.79 Bq/m3 for double entry dosimeter. The single entry dosimeter was found to give more reliable observations than that of double entry in terms of trends of seasonal data and also on the theory behind the manufacturing qualities.

scholarly journals Radon-thoron measurements in air and soil from some districts of northern part of India

2015 ◽  
Vol 30 (4) ◽  
pp. 294-300 ◽  
Author(s):  
Nisha Mann ◽  
Amit Kumar ◽  
Sushil Kumar ◽  
Rishi Chauhan
Keyword(s):  
Solid State ◽  
Radon Concentration ◽  
Indoor Environment ◽  
Indoor Radon ◽  
Correlation Study ◽  
Track Detector ◽  
Soil Samples ◽  
Indoor Radon Concentration ◽  
Nuclear Track Detector ◽  
Environmental Activity

Radon, thoron and their progenies in the indoor environment are considered as one of the health hazards. The alpha emitting nature of these gases made it possible to detect in indoor environment with the help of nuclear track detector techniques. The soil is the main source of indoor radon as it contains varying amounts of uranium and thorium. Thus the exhalation of radon from soil and its environmental activity needs to be studied. In the present study, the measurement of the indoor radon-thoron from the indoor environment and exhalation from soil are carried out using solid state nuclear track detector technique from Sirsa and Bhiwani districts of northern part of India. The canister technique was used to measure the radon ex- halation rate from the soil samples collected from the study area and pinhole based radon-thoron dosimeters were used to measure indoor radon and thoron concentration. The results show that indoor radon concentration varied from 9 to 28 Bq/m3, with an average of 18.9 Bq/m3 and from 5 to 21 Bq/m3, with an average of 13.8 Bq/m3, for Bhiwani and Sirsa, respectively. Similarly, thoron concentration varied from 14 to 48 Bq/m3, with average of 28.9 Bq/m3 and 27 to 54 Bq/m3, with the average of 39.0 Bq/m3, for Bhiwani and Sirsa, respectively. The mass exhalation rates from soil samples were also measured, to estimate their contribution to indoor radon. A correlation study was carried out between soil exhalation rates and indoor radon concentration.

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.

scholarly journals Indoor Radon Concentration and Risk Assessment in 27 Districts of a Public Healthcare Company in Naples, South Italy

Life ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 178
Author(s):  
Filomena Loffredo ◽  
Federica Savino ◽  
Roberto Amato ◽  
Alfredo Irollo ◽  
Francesco Gargiulo ◽  
...  
Keyword(s):  
Effective Dose ◽  
Annual Effective Dose ◽  
Indoor Radon ◽  
Geometric Mean ◽  
Quality Assurance Program ◽  
Geometric Standard Deviation ◽  
Public Healthcare ◽  
Indoor Radon Concentration ◽  
Lifetime Cancer Risk ◽  
Radon Concentrations

Radon is a major source of ionizing radiation exposure for the general population. It is known that exposure to radon is a risk factor for the onset of lung cancer. In this study, the results of a radon survey conducted in all districts of a Public Healthcare in Italy, are reported. Measurements of indoor radon were performed using nuclear track detectors, CR-39. The entire survey was conducted according to a well-established quality assurance program. The annual effective dose and excess lifetime cancer risk were also calculated. Results show that the radon concentrations varied from 7 ± 1 Bq/m3 and 5148 ± 772 Bq/m3, with a geometric mean of 67 Bq/m3 and geometric standard deviation of 2.5. The annual effective dose to workers was found to be 1.6 mSv/y and comparable with the worldwide average. In Italy, following the transposition of the European Directive 59/2013, great attention was paid to the radon risk in workplaces. The interest of the workers of the monitored sites was very high and this, certainly contributed to the high return rate of the detectors after exposure and therefore, to the presence of few missing data. Although it was not possible to study the factors affecting radon concentrations, certainly the main advantage of this study is that it was the first in which an entire public health company was monitored in regards to all the premises on the underground and ground floor.

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