Cause Analysis of Pressure Plate Breakage of Valve Limit Switch in Turbine Bypass System of Nuclear Power Plant

2nd International Conference on Design, Materials, and Manufacturing

材料科学;机械制造

Li, Nan^1 ; Wang, Ming Chang^1 ; Guan, Jian Jun^1 ; Li, Guo Dong^1

Suzhou Nuclear Power Rsearch Institute Co. Ltd., China^1

关键词: Bypass systems;    Installation error;    Limit switches;    Metallographic analysis;    Multiple fracture;    Pressure plate;    Stress state;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/220/1/012025/pdf
DOI  :  10.1088/1757-899X/220/1/012025

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The limit switch plates of nuclear power plant unit 1 in the turbine bypass system valve are finding multiple fractures. On the basis of metallographic analysis and vibration analysis, the stress state of the pressure plate is simulated and calculated. The results show that there are some creases in the original plate of the limit switch and the installation error of the pressure plate is the main reason for the break.