Abstract: Objective To understand the occupational health risk of routine inspection and maintenance in a coal-burning power plant in Jinan City of Shandong Province,explore the prevention and control measures of occupational hazards applicable to coal-burning power plant,so as to minimize occupational hazards and protect the health of workers in the routine inspection and maintenance of coal-burning power plant. Methods From October to December 2021,a coal-burning power plant in Jinan City of Shandong Province was selected as the object to identify and detect the occupational hazard factors of the routine inspection and maintenance personnel,and the semi-quantitative contact ratio method and risk assessment index method were used for risk assessment. Results The main occupational hazard factors in routine inspection and maintenance of the coal-burning power plant included chemical harmful factors（silica dust,limestone dust,coal dust,sulfur dioxide,nitrogen dioxide,carbon monoxide,ammonia,hydrochloric acid,sulfuric acid） and physical factors（noise,high temperature,power frequency electric field）.After detection,the over-standard rate was 5.55% in 18 points of chemical harmful factors measurement,the over-standard rate was57.14% in seven posts of noise measurement,and no over-standard post was found in two posts of high temperature measurement. The test results of other hazard factors were in line with the requirements of occupational exposure limits.There were eight types of work in the routine inspection and maintenance of the coal-burning power plant,in which boiler team inspection worker,the steam engine team inspection worker,the electric heating team inspection worker,the gray water team inspection worker,the coal transport team inspection worker,the dump machine inspection worker,the comprehensive team inspection worker had the medium risk level,while desulfurization team inspection worker had extremely high risk. Conclusion The occupational hazards of inspection workers of desulphurization team and comprehensive inspection workers need special attention in routine inspection and maintenance of the coal-burning power plant,and it is necessary to effectively implement regulatory measures in areas such as occupational disease hazard warning signs,individual protection,occupational health examinations,occupational health training,and emergency response measures,to reduce the incidence of occupational disease during routine maintenance of coal-burning power plants,and better protect the health and safety of routine maintenance workers in coal-burning power plants.

Key words: Coal-burning power plant, Routine inspection and maintenance, Occupational hazards, Risk assessment