226Ra, 232Th and 40K ACTIVITY CONCENTRATIONS AND RADIOLOGICAL HAZARDS OF BUILDING MATERIALS IN MUGLA, TURKEY

Ezgi Eren Belgin, Gül Asiye Ayçık
2.401 677

Abstract


The activity concentrations of natural gamma-emitting radionuclides in commonly used building materials were measured by using high purity germanium (HPGe) detector coupled with a high resolution multichannel analyser. The results associated radiation hazards due to 40K, 226Ra and 232Th have been determined in samples collected randomly from southwest part of Turkey. When the building materials such as clay brick, marble, cement etc. originating from soil and rocks are used in constructions they cause direct ionizing radiation exposure at varying intensities. Different criterion formulas as radium equivalent activity, the external/internal hazard indices, the alpha/gamma indexes and the absorbed dose rate in indoor air were determined to assess the radiation hazards arising due to the use of materials studied for people living in the construction of dwellings made of the these materials. Although indoor absorbed dose rate is relatively higher than the world population-weighted average value and international limit for studied brick and cement samples they could be used safely as building materials because radium equivalent activity, alpha/gamma indices and hazard indices of those materials have been found to be within the recommended limits. All the values for all criterion formulas for marble samples are found to be well below the safety limits recommended by UNSCEAR. It can be concluded that examined materials can be used for construction of buildings for interior and external works.

Keywords


Building materials, natural radioactivity, radiological hazard, gamma-ray spectrometry

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References


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