某抽水蓄能电站运行人员噪声暴露水平检测与分析
Noise Exposure Level in Workers of a Pumped Storage Power Station
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摘要:
目的 分析抽水蓄能电站运行人员的噪声暴露水平。 方法 检测运行人员在运行工况及备用工况每次巡检时的接噪强度以及巡检后控制室的噪声强度,结合运行人员在不同情况下的接噪时间,计算运行人员在四值三运转的工作制度下,1周42 h接触噪声强度的等效声级,进而换算至1周40 h接触噪声强度的等效声级。 结果 本研究共检测6次运行工况及3次备用工况下的个体噪声及控制室噪声,经过计算分析,得出运行人员1周42 h接触噪声的等效连续A声级为62.1 dB (A),换算至1周40 h接触噪声的等效连续A声级为62.3 dB (A)。 结论 抽水蓄能电站运行人员的噪声暴露水平未超过《工作场所有害因素职业接触限值第2部分:物理因素》(GBZ 2.2-2007)中规定的职业接触限值85 dB (A)。 Abstract:Objective To evaluate noise exposure levels of workers in pumped storage power stations. Methods Individual noise exposure levels in 2 patrolling workplaces and 1 control room and in both operating and alternative conditions were measured. A mathematical calculation based on individual exposure level and exposure time was used to evaluate workers' noise exposure of 42 h per week which was then converted to the time equivalent continuous A-weighted sound pressure level (LAeq) of 40 h per week. Results In this study, the noise exposure levels in 2 patrolling workplaces and 1 control room were measured 3 times a day in both operating and alternative conditions. The workers' LAeq of 42 h per week was 62.1 dB (A) . After conversion, the workers' LAeq of 40 h per week was 62.3 dB (A). Conclusion The noise exposure levels of workers in pumped storage power station do not exceed the occupational exposure limit of 85dB (A) prescribed in Occupational exposure limits for hazardous agents in the workplace Part 2: Physical agents.
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