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《Radialization Protection》 1989-02
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A SURVEY OF RADON AND ITS DAUGHTER ALPHA POTENTIAL ENERGY CONCENTRATIONS IN SOME NONURANIUM MINES AND CAVES IN HUNAN PROVINCE

Zeng Xinyuan;Liu Hanqin;Xiao Renyi(Hunan Provincial Institute of Labour Hygiene)  
This paper presents the results of survey of concentrationsof ~(222)Rn and its daughter alpha potential energy in some non-uranium minesand caves in Hunan Province.The measuring values in 78 caves,rangedfrom 0.032—2.57kBq/m~3 and 0.042—9.63 μJ/m~3 respectively.The mean ofconcentration of ~(222)Rn daughters alpha potential energy in 16 minesinvestigated ranged from 1.3—1.1×10μJ/m~3 in which 63% of the meanconcentrations of ~(222)Rn daughters alpha potential energy exceeded theoccupational limits(8.3μJ/m~3).
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