PENG Jun-zhe, ZHANG Lei, XU Zhi-yong, LING Guang-hua, ZHAI Zi-po, ZHU Guo-zhen, LI Bao-lin, HU Xue-feng
2017, 26(2): 203-206.
Objective To investigate the background level of the radionuclides content in foods from Taohuajiang nuclear power plant and surrounding area to provide scientific basis for evaluating the impact on food after plant operation.Methods The typical food collected around the nuclear power plant was taken as samples, which was pretreated according to the standard method, and tested by HPGe-γ spectrum measurement system.Results 9 kinds of radionuclides in the samples were detected.The results showed that there were 5 kinds of radionuclides in the samples:238U,232Th,226Ra,40K and 137Cs. Their activity concentrations were 9.6×10-2,1.5×10-1, 1.6×10-1,1.0×102 and 3.0×10-2Bq/kg,their range were (0.0~7.0×10-1),(0.0~3.7×10-1),(0.0~4.4×10-1),(2.6×10~1.6×102)and (0.0~1.6×10-1)Bq/kg. The average annual resident effective dose equivalent contributed by those 5 kinds of radionuclides were 4.0×10-1, 1.6, 2.3, 3.8×10 and 6.4×10-2μSv/a.Conclusion Both the activity concentration of radionuclides and the average annual resident effective dose equivalent contributed by them in foods from Taohuajiang nuclear power plant and surrounding area within 20km were background levels.
