Noise hazards and risk assessment in nuclear power enterprises
Objective To analyze the noise exposure distribution,hazard characteristics,and hazard intensity in nuclear power enterprises,and explore the application of three assessment methods in the risk assessment of noise-induced hearing loss in nuclear power enterprises,providing a scientific basis for controlling noise in nuclear power enterprises.Methods A total of 4 nuclear power plants were selected to conduct occupational health investigations and noise detection of a total of 8 nuclear power units and 308 noise-exposed workers,the noise doses of workplaces and individual positions(LEX,W)were measured respectively.The distribution of noise hazards in nuclear power enterprises was analyzed.The occupational hazard risk index method,ICMM model,and ISO 1999:2013 model were used to assess the risk of noise-induced hearing loss in nuclear power enterprises.Results The median of environmental noise exposure was 86.7 dB(A),58.8％(691/1 175)environmental noise exposure≥85 dB(A),and there was a statistical difference in environmental noise of different regions(H=227.427,P＜0.01).The median LEX,W was 81.6 dB(A)for operators and 84.1 dB(A)for cleaners.There were significant differences in the individual noise levels of workers in different positions(x2=24.399,15.800,P＜0.01).The ISO 1999:2013 model assessed the overall risk level of noise-induced hearing loss in nuclear power enterprises as low risk,while the occupational hazard risk index method and ICMM model with the risk assessment rating table method assessed the overall risk level as medium risk.The risk of noise-induced hearing loss was considered higher for cleaners by all three assessment methods.Conclusion The overall risk level of noise-induced hearing loss in nuclear power enterprises is medium risk,and the noise hazard risk of cleaners is higher,which should be focused.Meanwhile,supervision and inspection of contractors'occupational health work should be strengthened.
万方数据
维普
