华龙一号安全重要压力变送器设备鉴定研究

Research on Equipment Qualification for Pressure Transmitter Important to Safety of HPR1000

[目的]核电站安全重要压力变送器需通过设备鉴定,确定其在事故条件下可执行安全功能,而目前的相关标准并未对该类设备鉴定的逻辑与机理进行说明,合理性不够充分。[方法]基于对国内外安全重要电气设备鉴定体系的理解,结合华龙一号安全重要压力变送器实际鉴定过程,详细研究了安全重要压力变送器的鉴定理论。[结果]对影响其安全性能的重要运行环境因素进行了分析,识别了其显著老化机理,基于加速老化数学模型对加速老化试验进行了阐述,推荐了华龙一号安全重要压力变送器典型的加速老化顺序和鉴定流程。[结论]该鉴定流程可作为国内后续安全重要压力变送器的鉴定实施参考。

[Introduction]The pressure transmitter important to safety of nuclear power plant needs to pass the equipment qualification to confirm that it can perform the safety function under the accident condition.However,the current relevant standards do not explain the logic and mechanism of such equipment qualification,the rationality is not sufficient.[Methods]Based on the understanding of the identification system of electrical equipment important to safety at home and abroad,combined with the actual identification process of pressure transmitter important to safety of HPR1000,the identification theory of pressure transmitter important to safety was studied in detail.[Results]The important operating environment factors affecting its safety performance were analyzed,the significant aging mechanism was identified,the accelerated aging test was described based on the accelerated aging mathematical model,and the typical accelerated aging sequence and identification process of the safety-important pressure transmitter of HPR1000 was recommended.[Conclusion]The identification process can be used as a reference for the identification of safety-important pressure transmitters in China.