百万级压水堆核电站空冷汽轮机选型研究

Calculation and Selecting of Air-cooled Turbine in 1 000MW PWR Nuclear Power Station

针对国内某核电厂址的初步气象条件,进行了百万等级核电机组空冷汽轮机选型计算分析。分析结果表明,该厂址参数下若选用半转速核电汽轮机,目前已有的末级叶片不能满足要求,需要开发全新的空冷末级叶片;而利用大型火电空冷汽轮机已有运行业绩的末级叶片,开发全转速百万级核电空冷汽轮机,将花费较少的时间和经费,是比较适宜的方案。某厂址气象条件在我国北方具有代表性,上述工作为我国北方缺水地区核电站汽轮机选型提供了参考。建议国内汽轮机厂利用已有核电、火电汽轮机技术积累,尽快启动全转速百万级核电空冷汽轮机研发工作,形成具有完全自主知识产权的百万级核电空冷汽轮机技术,抢占技术制高点。

By analyzing the weather characters of one potential 1000MW nuclear power station site, this paper calculated the air-cooled steam turbine exhausting area. It is concluded that the present last long blade used in half-speed turbine is not suitable,new last long blade shall be developed if we want to use half-speed turbine in 1000MW air-cooled nuclear power station. However,the full-speed turbines and their last long blades used in coal burning power station are appropriate for this site, excepting plus one low pressure turbine and some measures to remove moisture steam in the last stage. The latter is better,for it will cost less money and time. The site mentioned in this paper is representive in China north area,and this paper is useful for turbine selecting of nuclear power station in this area. Domestic turbine manufacturers have accumulated many experiences and technologies by manufacturing and developing half-speed nuclear turbine and air-cooled full-speed turbines in coal burning power station. It is suggested the domestic turbine manufacturers should Setup the research work as soon as possible.