scholarly journals ASSESSMENT OF AVERAGE ANNUAL EFFECTIVE DOSE AND STUDY OF RADON CONCENTRATION IN DIFFERENT TYPES OF WATER SAMPLES

2020 ◽  
Vol 8 (02) ◽  
pp. 190-193
Author(s):  
M. S. A. Khan ◽  
Keyword(s):  
Effective Dose ◽  
Water Samples ◽  
Radon Concentration ◽  
Annual Effective Dose ◽  
Different Types

Annual effective dose from radon-222 concentration levels in underground water in bungoma south sub - county, Kenya

2021 ◽  
Vol 5 (1) ◽  
pp. 23-26
Author(s):  
Conrad Khisa Wanyama ◽  
George Wangila Butiki ◽  
John Wanjala Makokha ◽  
Fred Wekesa Masinde
Keyword(s):  
Effective Dose ◽  
Water Samples ◽  
Radon Concentration ◽  
Annual Effective Dose ◽  
Underground Water ◽  
Inhalation Dose ◽  
Average Value ◽  
Dug Wells ◽  
Concentration Levels ◽  
Recommended Action

This research measured the concentration levels of radon in groundwater and determined the ingestion and inhalation dose. The study used RAD7 detector with RAD7-H2O accessory from Durridge Company to determine the radon levels. Thirty water samples in granitic dominated regions were collected from various areas of Bungoma County: ten from boreholes (BH), ten from hand dug wells (WL) and ten from springs (SP). The water samples were collected in 250 ml bottles which were tightly covered with lid to avoid radon leakage. The highest value was 303±4.00 KBq/m3 recorded in Kanduyi well and the lowest was 126±11.4kBq/m3 from where most of the samples recorded a high radon concentration with a mean of 269±5.25 KBq/m3 in wells, 213±7.96 KBq/m3 in boreholes and 290±7.70 KBq/m3 in springs. The average ingestion dose was found to be 1.5±0.07mSv/yr, 1.9±0.09 mSv/yr and 2.1±0.1 mSv/yr. The average annual effective dose rate for the samples collected were 2±0.1 mSv/yr for boreholes, 2.6±0.13 mSv/yr for wells and 2.7±0.14 mSv/yr for springs. The samples reported an average value of AED higher than the world average of 1.15 mSv/yr but below the exception limit of recommended action level of 10 mSv/yr hence the radon concentration levels in underground water in the study area has minimal health implications to the population.

scholarly journals Assessment of the Annual Effective dose of Bottled Mineral Waters Using Closed Can Technique

2018 ◽  
Vol 14 (3) ◽  
pp. 5696-5707
Author(s):  
Hesham A. Yousef
Keyword(s):  
Drinking Water ◽  
Effective Dose ◽  
Water Samples ◽  
Radon Concentration ◽  
Mineral Water ◽  
Annual Effective Dose ◽  
Mineral Waters ◽  
Local Market ◽  
Radiological Risk ◽  
Can Technique

Water is the most important substance for life. Mineral waters are widely used as drinking water, and so that, it is important to determine the radon levels, and its risk in drinking water for public health and radiation protection. Radon concentration has been measured in the bottled natural mineral water samples commercially available in the Egyptian local market, using closed can technique. Radon concentration in water samples ranged from 0.93 - 6.89 Bql-1 and total annual effective dose ranged from 3.49 - 25.93 µSvy-1. The results indicate that radon concentrations in water samples lower than the recommended limit 11.1BqL-1 by EPA, and the annual effective dose of the samples are lower than the permissible international limit by EPA and WHO. The obtained results indicate that there is no significant public radiological risk related to radon ingested with drinking water in the present study.  

scholarly journals RADON CONCENTRATION IN GROUND WATER OF DHAKA CITY, BANGLADESH

2020 ◽  
Vol 5 (11) ◽  
pp. 61-70
Author(s):  
Shikha Pervin ◽  
Selina Yeasmin ◽  
Jannatul Ferdous ◽  
Afia Begum
Keyword(s):  
Ground Water ◽  
Effective Dose ◽  
Water Samples ◽  
Environmental Protection Agency ◽  
Radon Concentration ◽  
Activity Concentration ◽  
Annual Effective Dose ◽  
World Health ◽  
Dhaka City ◽  
Health Organization

Water is the most important source of life and ground water may contain varying levels of radioactivity. So it is therefore important to measure radon concentration in ground water for public health and radiation protection. In this study, radon concentration was measured in ground water samples collected from water pumps of different locations at Dhaka city, Bangladesh. Twenty ground water samples were collected in July 2017to April 2018 for radon level measurement. Radon detector RAD7 (manufactured by Durridge Company, USA) with RAD H2O technique was used for the measurement. The highest radon concentration was found 13.00±0.70 Bq/L for the pump of sample ID GW1 and the lowest radon concentration 2.13±0.593 Bq/L for the pump of sample ID GW10.The activity concentration of radon in maximum water samples in Dhaka city was lower than the value 11.1 Bq/L recommended by United States Environmental Protection Agency (USEPA). The radon concentration was lowered from the activity concentration before storage. The highest value of annual effective dose for radon in ground water was found 0.04745 mSv/y According to recommendation of World Health Organization, the annual effective dose level for radon in drinking water is 0.1 mSv/y. These results indicate that there is no probability of health hazards for public due to presences of radon in ground water and it is safe for consumption.

The Measurements of Natural Radioactivity, (Radon and Gamma concentrations), around the old fertilizer factory in Basrah/Iraq

2015 ◽  
Vol 7 (1) ◽  
pp. 1324-1335
Author(s):  
Jabbar H. Jebur
Keyword(s):  
Effective Dose ◽  
Radon Concentration ◽  
Gamma Ray ◽  
Annual Effective Dose ◽  
Track Detector ◽  
Exhalation Rate ◽  
Hazard Indices ◽  
Radium Equivalent ◽  
Passive Technique ◽  
Radium Activity

Radon concentration, exhalation rate, annual effective dose, radium activity, thorium, uranium potassium and radium equivalent have been measured in the present investigation for soil in the area around the old fertilizer factory in southern of Basrah Governorate. The measurements based on CR39 track detector for passive method, RAD7 for active method and NaI(Tl) for gamma concentration measurements. Average values for radon concentration in soil were 112.04±10.76 Bq/m3 using passive technique and 104.56±6.05 Bq/m3 using RAD7. From the result of the passive technique, area and mass exhalation rates and the annual effective dose were calculated. Gamma ray spectroscopy for the soil samples were performed and found that the average concentrations of 226Ra, 232Th and 40K were 50.89 Bq/kg, 21.74 Bq/kg and 640.4 Bq/kg respectively. Gamma ray hazard indices were calculated and found they are within the world average.

scholarly journals Radon Activity Concentrations in Natural Hot Spring Water: Dose Assessment and Health Perspective

2021 ◽  
Vol 18 (3) ◽  
pp. 920
Author(s):  
Eka Djatnika Nugraha ◽  
Masahiro Hosoda ◽  
June Mellawati ◽  
Untara Untara ◽  
Ilsa Rosianna ◽  
...  
Keyword(s):  
Public Health ◽  
Effective Dose ◽  
Radiation Protection ◽  
Water Samples ◽  
Hot Springs ◽  
Hot Spring ◽  
Annual Effective Dose ◽  
Spring Water ◽  
Dose Assessment ◽  
West Java

The world community has long used natural hot springs for tourist and medicinal purposes. In Indonesia, the province of West Java, which is naturally surrounded by volcanoes, is the main destination for hot spring tourism. This paper is the first report on radon measurements in tourism natural hot spring water in Indonesia as part of radiation protection for public health. The purpose of this paper is to study the contribution of radon doses from natural hot spring water and thereby facilitate radiation protection for public health. A total of 18 water samples were measured with an electrostatic collection type radon monitor (RAD7, Durridge Co., USA). The concentration of radon in natural hot spring water samples in the West Java region, Indonesia ranges from 0.26 to 31 Bq L−1. An estimate of the annual effective dose in the natural hot spring water area ranges from 0.51 to 0.71 mSv with a mean of 0.60 mSv for workers. Meanwhile, the annual effective dose for the public ranges from 0.10 to 0.14 mSv with an average of 0.12 mSv. This value is within the range of the average committed effective dose from inhalation and terrestrial radiation for the general public, 1.7 mSv annually.

Radon concentration in drinking water in villages nearby Rafsanjan fault and evaluation the annual effective dose

2014 ◽  
Vol 302 (3) ◽  
pp. 1167-1176 ◽  
Author(s):  
Mohammad Malakootian ◽  
Zahra Khashi ◽  
Farnaz Iranmanesh ◽  
Mojtaba Rahimi
Keyword(s):  
Drinking Water ◽  
Effective Dose ◽  
Radon Concentration ◽  
Annual Effective Dose

Evaluation of Gross Alpha and Beta Activity Concentrations and Annual Effective Dose in Drinking Waters of Misan Province-Iraq Using Low Background Gas Flow Proportional Counter (LB- 4110)

2021 ◽  
Vol 19 (11) ◽  
pp. 22-31
Author(s):  
Sawsan Sh. Fleifil ◽  
Zahraa A. Ismail AL-Sudani
Keyword(s):  
Drinking Water ◽  
Effective Dose ◽  
Water Samples ◽  
Proportional Counter ◽  
Gas Flow ◽  
Annual Effective Dose ◽  
Tap Water ◽  
Beta Activity ◽  
Low Background ◽  
Background Gas

In this study, assessment of levels natural radioactivity in drinking water samples of Misan Province of Iraq was carried out. A total of 33 (Tigris river, station and Tap) water samples collected from eleven places in Misan Province of Iraq. The beta and alpha gross radioactivity of the samples water was measured and an average annual effective dose derived of drinking-water ingestion was estimation utilizing new model a LB-4110 low background gas flow proportional counter. The data indicated that the Beta and Alpha gross activities and annual effective dose in samples did not exceed WHO recommended levels (0.5 Bq/L of Alpha gross, 1.0 Bq/L of Beta gross and 0.1 mSv/y for annual effective dose).

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.

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