期刊
APPLIED RADIATION AND ISOTOPES
卷 70, 期 4, 页码 699-704出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2011.12.001
关键词
Natural radioactivity; Building materials; Gamma-ray spectrometry; Radiological hazards
The natural level of radioactivity in building materials is one of the major causes of external exposure to gamma-rays. The primordial radionuclides in building materials are one of the sources of radiation hazard in dwellings made of these materials. By the determination of the radioactivity level in building materials, the indoor radiological hazard to human health can be assessed. This is an important precautionary measure whenever the dose rate is found to be above the recommended limits. The aim of this work was to measure the specific activity concentration of Ra-226, Th-232 and K-40 in commonly used building materials from Namakkal, Tamil Nadu, India, using gamma-ray spectrometer. The radiation hazard due to the total natural radioactivity in the studied building materials was estimated by different approaches. The concentrations of the natural radionuclides and the radium equivalent activity in studied samples were compared with the corresponding results of different countries. From the analysis, it is found that these materials may be safely used as construction materials and do not pose significant radiation hazards. (C) 2011 Elsevier Ltd. All rights reserved.
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