理化检验-物理分册2026，Vol.62Issue(8)：16-19,28,5.DOI:10.11973/lhjy-wl260089
核电站主蒸汽系统疏水管道壁厚减薄原因
Reasons for the thinning of the wall thickness in the main steam system hydrophobic pipeline of a nuclear power plant
陈子航 1张舟永 1陈新1
作者信息
- 1. 苏州热工研究院有限公司 材料工程技术中心,苏州 215004
- 折叠
摘要
Abstract
The wall thickness of the condensate hydrophobic pipeline downstream of the steam separator to the condenser in a nuclear power plant's main steam system was thinned.Macroscopic observation,chemical composition analysis,metallographic inspection,hardness testing,scanning electron microscopy and energy spectrum analysis were employed to analyze the cause of the pipe thinning.The results show that the thinning was caused by flashing erosion due to high-speed gas-liquid two-phase flow at the pipe outlet,resulting from significant pressure drop across the steam separator and prolonged downstream pressure below the saturated steam pressure.Additionally,issues such as small pipe diameter,turbulent flow induced by weld toes,and steam separator leakage led to continuous gas-liquid two-phase flow erosion,further exacerbating the pipe wall thinning.关键词
疏水管道/闪蒸冲蚀/壁厚减薄/气液两相流/压降Key words
hydrophobic pipeline/flash erosion/wall thickness thinning/gas-liquid two-phase flow/pressure drop分类
通用工业技术引用本文复制引用
陈子航,张舟永,陈新..核电站主蒸汽系统疏水管道壁厚减薄原因[J].理化检验-物理分册,2026,62(8):16-19,28,5.
