核电厂碳钢管道壁厚减薄原因分析

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Wall Thinning Analysis of Carbon Steel Pipes in Nuclear Power Plants

1. National Key Laboratory of reactor Fuel and Materials, Nuclear Power institute of China, Chengdu, 610041, China;
2. Jiangsu Nuclear Power Corporation, Lianyungang, Jiangshu, 222042, China

摘要: 近年来,核电厂二回路管道破裂引起的安全事故使得碳钢管道减薄问题受到越来越多关注。本文以某核电厂大修时发现壁厚减薄超标而更换下来的管道作为研究对象,通过成分分析、微观形貌分析和氧化膜分析等手段,结合管道的运行工况环境分析,最终确定管道壁厚减薄模式分别为冲刷腐蚀、流动加速腐蚀和汽蚀,并提出针对性改进措施。
- 碳钢管道 /
- 冲刷腐蚀 /
- 流动加速腐蚀 /
- 汽蚀
Abstract: The wall-thinning problem of carbon steel pipes causes great attention at present because of the accidents happened in nuclear power plants.This paper introduces the wall thinning research of carbon steel pipes in the conventional island of a nuclear power plant.Operation condition analysis,chemical composition analysis,metallic phase analysis,micrographic examination,and XRD analysis are performed.According to the analysis above mentioned,the reasons of carbon steel pipes wall-thinning in this nuclear power plant are erosion-corrosion,cavitation,and flow accelerated corrosion,respectively.
- Carbon steel pipes /
- Erosion-corrosion /
- Flow accelerated corrosion /
- Cavitation