ACP1000余排系统管道的强度分析与评定

Strength Analysis and Evaluation of ACP1000 Residual Heat Removal System Piping

目的深入研究PIPESTRESS程序计算原理和方法,总结软件的特点,并对如何更好地使用有限元软件完成核级管道计算工作提出自己的观点,为后续的管道计算工作提供指导。方法采用PIPESTRESS软件对ACP1000余排系统管道进行应力计算,结合RCC-M规范和管道分析的基本原理,从管道模型建立、载荷定义与工况组合、管道抗震分析和应力评定几个方面对PIPESTRESS软件的基本原理和具体应用进行深入分析与研究,并采用SYSPIPE软件对PIPESTRESS的计算结果进行设计验证,对产生误差的原因进行深入研究。结果虽然存在一些影响验证结果的因素,但两种软件的计算结果十分接近。结论PIPESTRESS程序能够很好地胜任对ACP1000核级管道的建模、力学分析和应力评定工作,具有良好的计算精度,该研究成果可以为ACP1000管道计算提供依据,对未来PIPESTRESS程序在新堆型中的应用也具有很大的参考价值。

Objective To study in depth the calculation principle and method of PIPESTRESS program,summarize the characteristics of the software,and propose viewpoints on how to better use finite element software to complete nuclear pipeline calculation to guide the subsequent pipeline calculation work.Methods PIPESTRESS software was used to calculate the stress of ACP1000 Residual Heat Removal System piping.Combined with RCC-M specification and the basic principle of piping analysis,the basic principle and specific application of PIPESTRESS were discussed and studied in depth from the aspects of piping model establishment,load definition and working condition combination,seismic analysis and stress evaluation of the calculation results.Then the design verification for PIPESTRESS was carried ont with the SYSPIPE software.The causes of errors were studied in depth.Results Although there were some factors affecting the results of verification,the results of the two kinds of software were very close.Conclusion PIPESTRESS program can be well qualified for the modeling,mechanical analysis and stress assessment of ACP1000 piping,and has good calculation accuracy.The research results can provide basis for the calculation of ACP1000 piping,and also have great reference value for the future application of PIPESTRESS program in new reactor.