Radon (222Rn) Radioactivity Level at the BATAN Workplace using RAD7

Passive integrated soild state nuclear track detectors were used to study the indoor radon-222 concentrations in 285 measurements in Kassala town, eastern Sudan. The influence of some factors e.g. type of building materials, geometrical shape of the measurement place, the position of the house, ect, on indoor radon concentration were studied. The measuerment of the indoor radon concentration obtained in the town ranged (from 27.14 to 384.00) Bq/m 3 , with an average of (92.38 ± 8.09) Bq/m 3 , which is far below the level recommended by ICRP, and higher than the world-wide, population weighted, average radon as reported by UNSCEAR publications.

Baghdad Science Journal, 2008

The present work aims to investigate approaches, measures and detection of indoor radon level in buildings of the department of physics in college of science of Baghdad University. CR-39 solid state nuclear track detectors were used to measure the radon concentrations inside the rooms, including five laboratories and five workplace rooms in ground and first storey of the department. The average radon concentration at first storey was found to be 43.1±13.2 Bq/m3 and 40.1±13.4 Bq/m3 at the ground storey. The highest level of radon concentration at the first storey in the radioactive sources store was 87.5±29 Bq/m3 while at the ground storey in room(2) was 70.2±24 Bq/m3 which is due to the existence radioactive sources in some selected places at the buildings.

IOP Conference Series: Earth and Environmental Science, 2019

The present study investigated the concentration of radon in some offices of a pharmaceutical company in Ota, Ogun State. A Durridge RAD 7 equipment was engaged for the indoor radon measurement. The measurement of radon concentration was carried out for 8 days in 4 different offices in the main administrative building of the company (one office on the ground floor and three on the first floor). The results obtained for the four locations ranged between 19 and 160 Bqm-3 which is still below the world set limit of 200 Bqm-3 as recommended by International Commission on Radiological Protection. However, the office on the ground floor reported the highest concentration of radon-222, which is 160 Bqm-3. Therefore, it can be concluded that, since, the highest concentration of radon-222 observed in this study is below the international set limit, then, the occupants of the offices considered for this study are safe.

Passive integrated soild state nuclear track detectors were used to study the indoor radon-222 concentrations in 285 measurements in Kassala town, eastern Sudan. The influence of some factors e.g. type of building materials, geometrical shape of the measurement place, the position of the house, ect, on indoor radon concentration were studied. The measuerment of the indoor radon concentration obtained in the town ranged (from 27.14 to 384.00) Bq/m 3 , with an average of (92.38 ± 8.09) Bq/m 3 , which is far below the level recommended by ICRP, and higher than the world-wide, population weighted, average radon as reported by UNSCEAR publications.

2017

The Ko Samui district of Surat Thani province is located in the high amounts of equivalent uranium in the ground surface that is the source of radon. Our research in the Ko Samui district aimed at comparing the indoor radon concentrations between dwellings and workplaces. Measurements of indoor radon concentrations were carried out in 46 dwellings and 127 workplaces, using CR-39 alpha-track detectors in closed-cup. A total of 173 detectors were distributed in 7 sub-districts. The detectors were placed in bedrooms of dwellings and workrooms of workplaces. All detectors were exposed to airborne radon for 90 days. After exposure, the alpha tracks were made visible by chemical etching before they were manually counted under an optical microscope. The track densities were assumed to be correlated with the radon concentration levels. We found that the radon concentrations could be well described by a log-normal distribution. Most concentrations (37%) were found in the range between 16 and...

Building and Environment, 2010

A survey concerning measurement of the indoor radon levels has been carried out in 105 workplaces of the Rawalpindi region and Islamabad Capital Territory using CR-39 based radon detectors. The main objective of this study was to assess the health hazard due to the indoor radon. CR-39 based NRPB type detectors were installed in offices/rooms located on first floors, ground floors and basements and were exposed to indoor radon for six months. The measured indoor radon concentration in the buildings surveyed ranged from 12 AE 5 to 293 AE 19 Bq m À3 with an overall mean value of 64 AE 32 Bq m À3 . The highest mean radon concentration (113 AE 48 Bq m À3 ) was observed in the offices located in basements of the Rawalpindi city. The overall average annual effective dose in the studied workplaces was estimated to be 0.61 AE 0.30 mSv. The mean annual effective doses in basements, ground floor and first floor were found to be 0.87 AE 0.34 mSv, 0.55 AE 0.28 mSv, and 0.47 AE 0.29 mSv, respectively. These values are less than the action level recommended by International Commission on Radiological Protection.

Radiation Science and Technology, 2019

Radon is an inert radioactive gas. A long term exposure to high concentration of radon causes lung cancer. Taking this into account, an investigation in some offices of Adigrat Universityhas been made to estimate the radon concentrations and to determine the health risk of the workers in the community. In the present study, Solid State Nuclear Track Detectors (LR-115 type II) has been used to measure the emission of radon from 12 offices for a period of 3 months. After an exposure time of 3 months, films were removed from each office andtaken for etching. After the etching, films were washed with distilled water and allowed to dry for 1day. Finally, alpha tracks were counted using an optical microscope at magnification power of 400X. Results obtained in the present study show that the value of concentration of radon ranges from 171.31 Bq.m −3 to 394.05 Bq.m −3 with mean concentration273.79 Bq.m −3 and standard deviation of 79.7Bq.m −3 and the inhalation dose rate varies from a minimum of 1.54 mSv.y −1 to a maximum of 3.55 mSv.y −1 with an average of 2.46 mSv.y −1 and standard deviation of 0.72 mSv.y −1. Even though, radon concentration levels were found to be higher the inhalation dose rate is safe within recommended limits

High radon concentration in work and living places are caused by a high geological radon potential of the soil, by technological processes, the use of building materials with high uranium, thorium and radium content and the building construction. Further the influence of the working and living conditions on the dose estimation is very important. Especially the equilibrium factor and the unattached fraction are influenced by the working and living conditions. Further we report on radon risk mapping, the search for radon affected work and living places and the experiences to propose the remedial action or radon protected building construction resulting from the radon risk of the soil. Further the quality control of this remediation or construction process respectively the efficiency of the radon protection will be presented. But not in all situations are remedial actions possible. Therefore is for exposure reduction a radon personal dosimetry necessary for a limitation and optimizatio...

— Indoor radon-222 concentration was estimated in thirty randomly selected homes and workplaces carried out within Sokoto metropolis (a Semi-Arid Extreme Northwest of Nigeria). The studies which may help understand the potential danger posed by radon-222 activity concentration known for its lung cancer potency. The city's metropolis was gridded into thirty grids over which thirty samples were collected using statistical random sampling; with the aid of Activated Charcoal Detectors (ACDs). The gamma-ray spectrometric analysed result by Sodium Iodide detector (NaI (Tl)) revealed that indoor radon concentration ranges from 358.81 to 542.30 Bq/m 3 with a mean value of 448.98 Bq/m 3 for homes and workplaces.

The Malaysian Journal of Analytical Sciences, 2014

An airtight chamber was designed and constructed in order to determine the emanation and the activity concentration of radon and to optimize measurement of radon emanation in terms of temperature, pressure and humidity. In this study, an airtight chamber in size of 0.50 m (width) x 0.40 m (depth) x 0.35 m (height) with total chamber volume of about 0.07 m was built by using a perspex material with 6 x 10 m of thicknesses. A Continuous Radon Monitor (CRM) Sun Nuclear model 1029 was used to measure the emanation of radon in the chamber. This homemade chamber has a rectangular opening with two key systems to insert and remove samples and continuous radon monitor to prevent any of disturbances to the flow of air in the chamber.An efficiency and leakage tests were carried out before radon activity was measured. Xenotime mineral was inserted into the chamber as a source of radon (Rn). Radon measurements were done for each hour over 96 hours counting time. The results indicated that the ba...