Background radioactivity levels of gross α and gross β in foods around Zhangzhou nuclear power plant,China
Objective To investigate the radioactivity levels of gross a and gross β in foods around Zhangzhou nuclear power plant,China before operation.Methods Forty-nine samples from 33 kinds of foods in 5 categories of daily food around Zhangzhou nuclear power plant were collected,pretreated,dried,and ashed.The radioactivity levels of gross α and gross P were measured by the low-background α and β measuring instrument.The atomic absorption technique was em-ployed to measure the level of potassium(K),and the radioactivity level of gross β(subtracting 40K)was calculated with K concentrations in different foods consulted from the nutritional dietary system.Results The radioactivity levels of gross αin vegetables and fruits,grain,poultry and livestock,aquatic products,and tea around Zhangzhou nuclear power plant were＜minimum detectable level(MDL)-7.97,＜MDL-6.82,＜MDL,＜MDL-20.76,and 11.90-23.08 Bq/kg,respectively;the radio-activity levels of gross β were 34.56-122.81,13.05-188.96,56.00-108.34,17.86-169.01,and 123.74-171.63 Bq/kg,respect-ively;the radioactivity levels of gross P(subtracting 40K)were not detected(ND)-14.27,ND-27.86,ND-48.72,ND-45.85,and 6.69-13.79 Bq/kg,respectively.Conclusion The radioactivity of gross α and gross β in foods around Zhangzhou nuc-lear power plant before operation is basically at the same level as that in other areas of China.
NETL
NSTL
万方数据
