核电厂疏水管道穿孔原因分析及处理
Analysis and Treatment of Drain Pipe Through-wall Leak in Nuclear Power Plants
摘 要
针对核电厂疏水管道穿孔、阀件冲蚀损坏现象, 通过分析流动加速腐蚀和气蚀对管道破坏的影响, 确定调节阀后气蚀是引起故障的根本原因。在保证系统功能满足设计规范的前提下, 通过调整阀门开度的方法, 重新分配管道各级压降, 可有效避免气蚀的发生。针对疏水管道的冲蚀破坏, 提出了相关建议。
气蚀
流动加速腐蚀
穿孔
drain pipes
cavitation
flow accelerated corrosion
through-wall leak
Abstract
Aiming at the phenomena of drain pipe through-wall leak and valve part erosion in nuclear power plants, the main cause of failure was confirmed to be cavitation taking place behind valves by analyzing the influence of flow accelerated corrosion (FAC) and cavitation on water pipes. On the base of system functions consistent with design criteria, cavitation could be effectively avoided by adjusting the opening of valves and redistributing pressure drop inside pipes. Some advice had been given to solve the problem of erosion in drain pipes.
中图分类号 TM623.4 TK11+3
所属栏目 质量控制与失效分析
基金项目
收稿日期 2013/9/5
修改稿日期
网络出版日期
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备注史庆峰(1982-), 男, 工程师, 硕士。
引用该论文: SHI Qing-feng,WANG Bi-ning,DONG Lei,ZHANG Hui,KANG Yu-jun. Analysis and Treatment of Drain Pipe Through-wall Leak in Nuclear Power Plants[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2014, 50(9): 671～673
史庆峰,王必宁,董雷,张晖,康豫军. 核电厂疏水管道穿孔原因分析及处理[J]. 理化检验－物理分册, 2014, 50(9): 671～673
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参考文献
【1】SCONNINI R, WASSINK C H P, KOOREN T. Condition assessment of components susceptible to flow accelerated corrosion[C]//FAC 2008 International Conference. Lyon, France:[s. n.],2008:1173-1781.
【2】张桂英,顾宇,邵杰.核电站汽水管道流动加速腐蚀的影响因素分析及对策[J].动力工程学报,2012(2):170-176.
【3】陈娟.节流孔板在发电厂的应用[J].广东电力,2004(4):46-48.
【2】张桂英,顾宇,邵杰.核电站汽水管道流动加速腐蚀的影响因素分析及对策[J].动力工程学报,2012(2):170-176.
【3】陈娟.节流孔板在发电厂的应用[J].广东电力,2004(4):46-48.
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