介绍了无法进行在线中腔试压闸阀的结构改进,论述了快速检测核电站闸阀密封性的方法,达到了快速判断维修、节省工期和提高效率的目的。 The structure improvement of in-line pressure-test valve in medium-pressure chamber was introduced. The method to quickly detect the leak of gate valve in nuclear power plant was discussed. The purpose of rapid judgment and maintenance, saving of construction period and efficiency were discussed.