Frequency Distribution of Specific Activities of Natural Radionuclides and Radiological Hazard Indices in Beach Sand Samples from Maharat Beach Songkhla Province, Thailand

Abstract

The frequency distribution of specific activities of natural radionuclides in 30 beach sand samples collected from Maharat beach of Songkhla province in southern region of Thailand, have been studied, measured and analyzed. It was found that the frequency distribution of specific activities of natural radionuclides (40K, 226Ra and 232Th) were asymmetrical distribution with the skewness of 0.95, 1.09 and 1.03 and the median values of 889.64, 39.36 and 37.73 Bq/kg, respectively. Furthermore, four radiological hazard indices were evaluated for this area by using the 40K, 226Ra and 232Th median values. Moreover, the results were also compared with the Office of Atoms for Peace (OAP) annual report data, Thailand and global radioactivity measurement and evaluations.