摘要
本文从国内某核电厂热态试验中核一级截止阀密封焊多次外漏问题出发,经综合分析,结果表明阀盖紧固力矩设计值缺失和密封焊质量控制不到位、密封垫片选型不合理是外漏的根本原因。同时介绍了阀门外漏处理方案,为后续机组及其他电厂同类问题提供一定的借鉴。
This paper starts with a problem that the seal welding of the nuclear class one globe vavles leak many times.With a comprehensive analysis of the fundamental reason,the results show that the quality of the valve cover fastening torque value and seal welding quality out of control,the selection of sealing gasket selection not suitable are the fundamental reasons of leakage.At the same time,this paper introduces the valve leakage treatment scheme,and it provides certain reference for the same kind of follow-up units and other plants.
引文
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