1325 K - Iranian Journal of Medical Physics

2 downloads 0 Views 1MB Size Report
Iranian Journal of Medical Physics ijmp.mums.ac.ir. Radiological Hazard Resulting from Natural Radioactivity of. Soil in East of Shazand Power Plant.

Iranian Journal of Medical Physics ijmp.mums.ac.ir

Radiological Hazard Resulting from Natural Radioactivity of Soil in East of Shazand Power Plant Reza Pourimani1*, Tayebeh Davoodmaghami1 1. Department of Physics, Faculty of Science, Arak University, Arak, Iran ARTICLE INFO

ABSTRACT

Article type:

Introduction: Nuclear radiation is potentially harmful to humans and soil contamination with radionuclides is the main source of human radiation exposure. These radionuclides can., enter to human body through the food chain. In this study, 34 soil samples were collected from between Arak city and Shazand Power Plant over 20 km length and analyzed. Materials and Methods: The specific activities of 226Ra, 232Th, 40K, and 137Cs were measured in soil samples, using gamma-ray spectrometry and a high-purity germanium (HPGe) detector. For all the samples, we calculated radiological hazards such as radium equivalent (Ra eq), dose rate in air (D), internal and external hazard indices (Hin, Hex), annual gonadal dose equivalent (AGDE), and excess lifetime cancer risk. Results: The specific activities of 226Ra, 232Th, 40K, and 137Cs in the soil samples varied from 18.92 to 43.11, 25.31 to 54.27, 230.17 to 728.25, and from