掺粉煤灰预应力混凝土输水管的放射卫生评价张淑蓉，徐翠华，任天山（卫生部工业卫生实验所，北京１０００８８）１引言目前世界各国都比较重视电厂煤灰的综合利用，有些国家如日本、丹麦对煤灰的利用率已高达９０％以上，波兰、法国、美国为５０～７０％，我国燃煤电厂年... Radiation Hygienic Evaluation of Fly Ash Prestressed Concrete Water Conveyor Zhang Shurong, Xu Cuihua, Ren Tianshan (Institute of Industrial Hygiene, Ministry of Health, Beijing 100088) 1 Introduction At present, all countries in the world pay more attention to the comprehensive utilization of coal ash in power plants. Some countries, such as Japan, Denmark’s coal ash utilization rate has reached as high as 90%, Poland, France, the United States for 50 to 70%, China’s coal-fired power plant years ...