Measurement of Ambient Gamma Dose rate in air in Phayao province
Authors: Suphansa Chansuriya, W. Prannicha Hongpitakpong, Maitree Sriya
Publication Type:KKU Sci. Journal
Year: 2017
Abstract: In this research, the objective was to compare the ambient gamma dose rate in Phayao
province with the standard level of the office of atoms for peace (OAP). The data were
collected from the radiation monitoring station at School of Science, University of Phayao
between 28 March 2011 to 15 May 2015. The proportional counter type (BERHOLD) gamma
radiation detector and the display monitor of Micro Gamma LB111 were used to collect and
evaluate the ambient gamma dose rate on daily basic. During 2011 to 2015, the values of
ambient gamma dose rate were ranged 0.172-0.052, 0.164-0.043, 0.154-0.122, 0.156-0.114, and
0.149-0.140 Sv/hr and with the average 0.146, 0.154, 0.145, 0.146 and 0.143 Sv/hr
respectively. The average values of ambient gamma dose rate were in normal levels compared
to the OAP standard of 0.040-0.150 Sv/hr exception in year 2012, which the mean value was
slightly higher than the background radiation in the environment. Moreover, the average data
were compared with other radiation monitoring stations using the same detection system in
Ubonratchathani, Trat and Ranong. It was found that the average values were different from
each other due to the geographical location. However, the averages of all stations gamma dose
rates were acceptable and safe.
Keywords: Radiation Monitoring Station, Ambient Gamma Dose rate in air
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