首页|一种新型反应堆压力容器高温C形环研究

一种新型反应堆压力容器高温C形环研究

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C形密封环是保证核电站反应堆压力容器密封的核心部件,其密封性能直接关系到核电厂安全稳定运行.目前核电站普遍使用的是密封层包银的C形环,但是包银C形环的使用温度一般限制在400 ℃以下,针对某设计温度高达550 ℃,且要经历多次冷、热态温度循环工况的某新型高温核电机组反应堆压力容器,介绍一种新型包镍C形环的主要结构材料、制造工艺和技术关键,并且通过搭建常温、高温性能试验台架,对该新型包镍C形密封样品环进行常温和高温下的各项冷、热态综合性能试验.试验结果分析表明:研究的新型包镍高温C形密封环在高温550 ℃下的泄漏率可达到≤5.0×10-6 Pa·m3/s,可供核电站以及其他工程领域550 ℃高温用金属静密封环的密封检测和密封环的工程应用提供参考.
Research on a New Type of High Temperature C-shaped Ring for Reactor Pressure Vessels
The C-shaped sealing ring is the core component that ensures the sealing of the pressure vessel in nuclear power plants,and its sealing performance is directly related to the safe and stable operation of nuclear power plants.At present,the commonly used C-shaped ring in nuclear power plants is a sealed layer coated with silver.However,the usage temperature of the silver coated C-shaped ring is generally limited to below 400 ℃.For a new type of high-temperature nuclear power unit reactor pressure vessel with a design temperature of up to 550℃ and multiple cold and hot temperature cycling conditions,this paper introduces the main structural materials,manufacturing process,and technical key of a new type of nickel coated C-shaped ring,and conducts various cold and hot comprehensive performance tests on the new nickel coated C-shaped sealed sample ring at room temperature and high temperature.The experimental results show that the leakage rate of the new nickel coated high-temperature C-shaped sealing ring studied can reach ≤5.0×10-6 Pa·m3/s at a high temperature of 550 ℃,which can be used for the engineering application of metal static sealing rings at 550℃ in nuclear power plants and other engineering fields.

nuclear power plantsnickel coatinghigh temperaturesealing ringresearch

方晓璐、李华、张会

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中国核电工程有限公司,北京 100048

核电站 包镍 高温 密封环 研究

2025

液压气动与密封
中国液压气动密封件工业协会

液压气动与密封

影响因子:0.444
ISSN:1008-0813
年,卷(期):2025.45(1)