|
China's annual production of fly ash is about a few million tons, lower use of natural radionuclide content of fly ash for building materials , both to reduce the ash yard area , protect the environment and improve the social and economic benefits , while protect public health and safety . This paper studies the absolute and relative measurements of the impact factor , focusing on the spherical source for round face detector solid angle and the source of self-absorption factor , with previous calculations exactly. Under certain conditions , can be regarded as point-like sources for round face detector solid angle , and use of the existing conditions of the laboratory measurement of radioactive spots on a round face detector efficiencies , the results show both with source and the distance between the detector decreases . Xinjiang coal-fired power plants fly ash , slag emissions and utilization of a more systematic investigation of the case , a general understanding of fly ash, slag whereabouts . Focus on Xinjiang Urumqi, Yili , Hami and Urumqi in China coal power plants and the country 's power plants fly ash, slag sampling measurements where natural radionuclides (226) ~ Ra, (232) ~ Th, (40) ~ K 's content , discuss fly ash, slag enrichment of radionuclides and radioactivity level classification index based on the classification of fly ash can be divided into high-quality , well mixed with , poor four levels, both I_r are less than 0.48 , the fly ash was doing the main building material, its use is not restricted. China power plant slag samples were produced 60 mesh, 80 mesh and 100 mesh sample to explore whether the size of the sample particles affect radionuclide content . The results appear in between 60 mesh to 100 mesh , particle size negligible effect on the measurement . China plants surrounding soil , cement and sand in Xinjiang unique spa with sand sampling measurement which (226) ~ Ra, (232) ~ Th, (40) ~ K content of the soil around the plant showed that China is not the presence of radioactive contamination , cement and sand therapy with sand natural radioactivity levels close to normal levels of radioactive materials .
|