RADIATION MEASUREMENTS

Radon is a radioactive gas which makes the primary contribution to the natural radiation to which people are exposed. For that reason, great importance is attributed to the determination of radon concentration levels in water, indoor air, soil gas and outdoors. In the present work radon content measurements in soil gas, as well as gamma dose rate surveys of the surface area were realized at 112 stations in Western Turkey. The scintillation detector of EDA Instrument Inc. was used for the radon measurements in soil gas. The radon concentration in 40 thermal water samples in same region was also studied. Radon concentration was measured by the collector chamber method. Radon distribution was found to be related with the tectonic lines and high heat flow zones in the region. (c) 2005 Elsevier Ltd. All rights reserved

INDOOR AND BUILT ENVIRONMENT

The activity concentrations of U-238, Th-232 and K-40 in brick, cement and sand samples used as building materials in Manisa province were analysed by a gamma-ray spectroscopy coupled with a Nal (TI) detector. Doses received by the citizens living in Manisa due to these building materials were also calculated. The highest activity concentrations of U-238, Th-232 and K-40 found in the sand samples were 1559.10 Bq(.)kg(-1), 142.48 Bq(.)kg(-1) and 1711.47 Bq(.)kg(-1), respectively. The maximum mean of radium equivalent activity Ra-eq was 945 Bq(.)kg(-1) calculated for levels in sand, gravel and stone samples

RADIATION MEASUREMENTS

The aim of this study is to investigate the relationship between the earthquakes and radon concentrations in thermal waters along faults in the Denizli Basin, an area in Turkey known for its high seismic activity and thermal waters. This area was chosen because it exhibits active crustal movements combined with seismicity and there are numerous outflow thermal waters and gas outputs. In addition, this region has the type of tectonic activity where graben groups and faults take place. Measurements of radon levels and of some chemical and physical characteristics of thermal waters were made at seven sampling stations in the region. Radon concentrations were measured by a ZnS(Ag) scintillation counter in a collector chamber. The activity levels varied between 0.67 and 25.90 kBq m(-3) during the period of May-December 2000. In the evaluation of the results, the seismic data reported by Bogazici University Kandilli Observatory and Earthquake Research Institute, Seismological Laboratory were used. The increases observed in radon concentration at two stations were probably related to the earthquakes that took place in the region during the study period. (c) 2006 Elsevier Ltd. All rights reserved

RADIATION MEASUREMENTS

Natural radionuclide activity concentration of surface soils at 64 locations in central Manisa were measured using gamma spectrometry (ORTEC). The natural gamma radioactivity of the terrestrial radionuclides in soil samples and the gamma-absorbed dose rates of these radionuclides in air were calculated. In this study, track etch film (CR-39) was used to determine the distribution of radon levels in dwellings. The average annual effective dose equivalents from the calculated outdoor terrestrial gamma radiation for a person in Manisa is 66 mu Sv, whilst the annual effective dose equivalent from Rn-222 is calculated to be 4.83 mSv/yr. (c) 2006 Elsevier Ltd. All rights reserved

The Measurement of Concentrations of Radon-222 Daughters İn the Air By Alpha Spectroscopy

2nd International Colloquium on Gas Geochemistry -- JUL 05-09, 1993 -- UNIV FRANCHE-COMTE, BESANCON, FRANCEWOS: A1995BF33B00042Univ Franche Comt

Radon levels in new and old buildings

NATO Advanced Research Workshop on Fundamentals for the Assessment of Risks from Environmental Radiation -- OCT 06-10, 1997 -- BRNO, CZECH REPUBLICWOS: 000081618100009(222)Radon is a colorless, odorless, tasteless, radioactive gas that occurs naturally in soil, rocks, underground water, and air. It is produced by the natural breakdown of (226)Radium in soil and rocks. In outdoor air, radon is usually presents at such low levels that there is very little risk. However, when radon enters a building, it and its decay products can accumulate to high concentrations. Radon, itself, naturally breaks down and forms radioactive decay products. As one breathes, the radon decay products can become trapped in lungs. As these decay products break down further, they release small bursts of energy which can damage lung tissue and lead to lung cancer. In this study, the indoor radon concentrations of some buildings of different ages in Bornova town of Izmir were determined. Lucas Cells and nuclear track detectors (CR-39) were used for the measurements of Rn-222 levels in the rooms of 15, 25 and 150 years old buildings. The annual effective dose equivalent from 222Rn was calculated in these buildings.NAT

Gross alpha-particle activities in the ground waters in Western Anatolia

WOS: A1996UZ29700015PubMed ID: 8759158The purpose of this study is to present data on gross alpha-particle activity, pH and conductivity in the ground waters in Western Anatolia. The gross alpha-particle activities in 27 ground water samples were determined by radiochemical carrier-precipitation methods. The gross alpha-particle activities of water samples were measured by using a ZnS (Ag) detector system. Measurable alpha-particle activity is present in all ground water samples, with one ground water sample having a gross alpha-particle activity > 0.55 Bq/L. Copyright (C) 1996 Elsevier Science Lt

Measurements of radon content in soil gas and in the thermal waters in Western Turkey

WOS: 000233857800015Radon is a radioactive gas which makes the primary contribution to the natural radiation to which people are exposed. For that reason, great importance is attributed to the determination of radon concentration levels in water, indoor air, soil gas and outdoors. In the present work radon content measurements in soil gas, as well as gamma dose rate surveys of the surface area were realized at 112 stations in Western Turkey. The scintillation detector of EDA Instrument Inc. was used for the radon measurements in soil gas. The radon concentration in 40 thermal water samples in same region was also studied. Radon concentration was measured by the collector chamber method. Radon distribution was found to be related with the tectonic lines and high heat flow zones in the region. (c) 2005 Elsevier Ltd. All rights reserved

Natural Radioactivity Measurements Around a Coal-Fired Thermal Power Plant İn Turkey

2nd International Colloquium on Gas Geochemistry -- JUL 05-09, 1993 -- UNIV FRANCHE-COMTE, BESANCON, FRANCEWOS: A1995BF33B00034Univ Franche Comt

Determination of radioactivity levels in Akhisar, Gordes, Golmarmara and Sindirgi regions, Western Turkey

WOS: 000330780800008In this study, radioactivity measurements in the environment of Akhisar, Golmarmara, Gordes and Sindirgi regions in Western Turkey were investigated in order to evaluate the implications of any excess radioactivity in the environment of geological formation. The radioactivity concentrations of K-40, U-238 and Th-232 radionuclides in the soil samples were measured by a NaI(Tl) gamma spectrometer system, and the radium activity concentrations in the water samples were also analyzed by an ZnS(Ag) alpha counter by the collector chamber method. The radioactivity of K-40, U-238 and Th-232 in soils ranged 2.80-2,347.77, 9.90-256.19 and 9.66-106.53 Bq kg(-1), respectively. The activity of Ra-226 in the water samples ranged from 0.03 Bq L-1 (0.89pCi/L) to 0.80 Bq L-1 (21.58pCi/L). In addition, the external terrestrial gamma dose rate in air (nGy h(-1)), annual effective dose rate (mSv year(-1)) and radium equivalent activity (Bq kg(-1)) were calculated and compared with international standard values.Celal Bayar University Scientific Research Projects Coordination (BAP)Celal Bayar University [2010/10]In this study, Celal Bayar University Scientific Research Projects Coordination (BAP) No. 2010/10 with the Project is supported