scholarly journals A Research Study on the Radiological State of Building Material and the Risk Assessment

2020 ◽  
Vol 6 ◽  
pp. 313
Author(s):  
A. Savidou ◽  
C. Raptis ◽  
P. Kritidis
Keyword(s):  
Building Materials ◽  
Gamma Ray ◽  
Scintillation Counter ◽  
Natural Radionuclide ◽  
Radon Exhalation ◽  
Radionuclide Content ◽  
Flow Through ◽  
Materials Used ◽  
Lucas Cell ◽  
Continuous Accumulation

The objective of the present study is focused an the assessment of the radiological risk from building materials used in Attica region, Greece. Bricks and concrete com- monly used in Attica region have been studied for both natural radionuclide content and radon exhalation. The high-resolution gamma-ray spectroscopy technique, as well as radon exhalation measurements, have been employed. The technique used for the measurements of the radon exhalation is called "continuous accumulation- counting" method and has been described in detail by the authors in earlier pub- lications. This measurement technique is based on the continuous air flow through a sealed chamber containing the sample and through a scintillation counter (Lucas cell). The counting is continuous as well.

scholarly journals Natural radiation exposure and radon exhalation rate of building materials used in Turkey

2018 ◽  
Vol 33 (2) ◽  
pp. 159-166
Author(s):  
Seref Turhan ◽  
Alper Temirci ◽  
Asli Kurnaz ◽  
Aydan Altikulac ◽  
Elif Goren ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
Building Materials ◽  
Gamma Ray ◽  
Germanium Detector ◽  
Gamma Ray Spectrometry ◽  
Limit Values ◽  
Radon Exhalation ◽  
Activity Concentrations ◽  
Materials Used ◽  
Radioactivity Levels

Measuring the natural radioactivity levels and radon exhalation rates (surface and mass) in building materials is essential to evaluate the extent of radiation exposure (external and internal) for residents in dwellings. Gamma-ray spectrometry with a high purity germanium detector was used to measure the activity concentrations of 226Ra, 232Th, and 40K in some building materials used in Turkey. Moreover, an active radon gas analyser with an accumulation container was used to measure their radon surface and mass exhalation rates. Results showed that the activity concentrations of 226Ra, 232Th, and 40K varied from 5.2 ? 0.6 (satin plaster) to 187.0 ? 2.4 (granite) Bqkg-1, 2.6 ? 0.8 (gypsum) to 172.2 ? 7.6 (granite) Bqkg-1 and 12.3 ? ? 17.0 (sand) to 1958.0 ? 83.4 (brick) Bqkg-1, respectively. Radon surface and mass exhalation rates varied from 2.9 (marble) to 2734.6 mBqm-2h-1(granite) and 0.033 (marble) to 53.866 mBqkg-1h-1 (granite), respectively. The activity concentration index, indoor absorbed gamma dose rate and corresponding annual effective dose were estimated and compared with the recommended limit values. The results indicated that the building materials sampled presented no significant radiological risk.

Radon exhalation rate and natural radionuclide content in building materials of high background areas of Ramsar, Iran

2013 ◽  
Vol 117 ◽  
pp. 36-40 ◽  
Author(s):  
E. Bavarnegin ◽  
N. Fathabadi ◽  
M. Vahabi Moghaddam ◽  
M. Vasheghani Farahani ◽  
M. Moradi ◽  
...  
Keyword(s):  
Building Materials ◽  
Natural Radionuclide ◽  
Radon Exhalation Rate ◽  
Exhalation Rate ◽  
High Background ◽  
Radon Exhalation ◽  
Radionuclide Content

scholarly journals Natural Radioactivity in Clay and Building Materials Used in Latvia

2015 ◽  
Vol 52 (3) ◽  
pp. 58-66 ◽  
Author(s):  
D. Riekstina ◽  
J. Berzins ◽  
T. Krasta ◽  
R. Svinka ◽  
O. Skrypnik
Keyword(s):  
Building Materials ◽  
Activity Index ◽  
Natural Radionuclide ◽  
Spectrometry Method ◽  
Radionuclide Content ◽  
Clay Deposits ◽  
Index Study ◽  
Analogous Data ◽  
Materials Used ◽  
Clay Ceramics

Abstract This paper presents the results of natural radionuclide concentration and activity index study in materials used for construction in Latvia. Special attention is given to clay and clay ceramics. Concentrations of K-40 and Th- 232, U-238 radioactivity were determined using gamma-spectrometry method. In some building ware, maximal concentration of K-40 was 1440 Bq/kg, and of U-238 - 175 Bq/kg. In granite, the determined maximum concentration of Th-232 was 210 Bq/kg. It was found that radionuclide content in different period clay deposits can differ by more than two times, and up to five times in different clay ceramics. The results obtained are compared with analogous data from the other Baltic and North European countries.

scholarly journals A Study of Greek Building Materials as Indoor Radon Sources

2020 ◽  
Vol 4 ◽  
pp. 180
Author(s):  
A. Savidou ◽  
C. Raptis ◽  
P. Kritidis
Keyword(s):  
Building Materials ◽  
Gamma Ray ◽  
Indoor Radon ◽  
Radon Emanation ◽  
Single Measurement ◽  
Radon Exhalation ◽  
Short Time ◽  
High Resolution Gamma Spectrometry ◽  
Continuous Accumulation

A survey of radon emanation in building materials commonly used in Attica has initiated at our laboratory as part of a broader EU program. The objective is to obtain a characterisation of the Greek building materials as indoor radon sources and identify the cases where some specific countermeasures should be applied. Up to now, bricks commonly used in Attica have been studied for both radium content and radon emanation. Gamma-ray spectroscopy techniques, as well as radon exhalation measurements, have been employed. For determination of radon exhalation rate, besides the trivial method which consist of a single measurement of radon concentration in a closed vessel containing the sample, a short-time continuous accumulation/counting method has been established. The results of exhalation measurements have been used together with high-resolution gamma-spectrometry in order to determine radon emanation coefficients.

scholarly journals NATURAL RADIONUCLIDE DISTRIBUTION AND RADON EXHALATION RATE FROM THE SOIL IN VILNIUS CITY

2007 ◽  
Vol 15 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Dainius Jasaitis ◽  
Aloyzas Girgždys
Keyword(s):  
Building Materials ◽  
Natural Radionuclides ◽  
Natural Radionuclide ◽  
Radon Exhalation Rate ◽  
Clay Loam ◽  
Exhalation Rate ◽  
Radon Exhalation ◽  
Radionuclide Distribution ◽  
The City ◽  
Different Soils

In the territory of Vilnius city radioisotopic composition of different soils was experimentally determined and radon exhalation rate from the soil was evaluated using these data. Specific activitys of natural radionuclides 226Ra, 232Th and 40K were measured. From identified natural radionuclides the biggest quantities were for 40K (263 Bq/kg), the smallest values ‐ for 232Th (5 Bq/kg), average 226Ra values reached 13 Bq/kg. Radon exhalation rate from the soil in Vilnius city was calculated and evaluated. Distribution of radon exhalation rate values in the whole territory of the city is stated. The received values vary from 15 Bq/m2·h (in clay loam) to 23 Bq/m2·h (in sand). It is assessed that of the most important parameters, which determine radon exhalation rate from the soil, are the quantity of radium and the porosity of the soil. It is observed that radon exhalation rate from the soil is bigger than that from building materials. This difference is determined by a bigger porosity of the soil.

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