CAJ | 학술논문

流动加速腐蚀( FAC)是造成核电厂二回路碳钢管道失效的主要原因之一. 根据腐蚀管道剩余强度评价方法和核电厂承压管道抗震设计规范RCC-M,提出了基于应力的失效极限状态方程对二回路腐蚀缺陷管道抗震可靠度进行计算. 通过不同腐蚀管道剩余强度评价方法,采用一次二阶矩( JC)法分析了二回路腐蚀管道的时变抗震可靠性指标,得到了流动加速腐蚀管道抗震可靠性随运行年限的演化规律,对核电二回路管道的评估和修复提供参考.
류동가속부식( FAC)시조성핵전엄이회로탄강관도실효적주요원인지일. 근거부식관도잉여강도평개방법화핵전엄승압관도항진설계규범RCC-M,제출료기우응력적실효겁한상태방정대이회로부식결함관도항진가고도진행계산. 통과불동부식관도잉여강도평개방법,채용일차이계구( JC)법분석료이회로부식관도적시변항진가고성지표,득도료류동가속부식관도항진가고성수운행년한적연화규률,대핵전이회로관도적평고화수복제공삼고.
The flow accelerated corrosion ( FAC) is one of the main causes for carbon steel pipe failure in the sec-ondary loop piping system in nuclear power plants. Based on the residual intensity appraisal method for corroded pipes and the code for seismic design of pressure pipe-RCC-M code for the PWR nuclear islands, the ultimate stress failure equation is derived to calculate the seismic time-dependent reliability for corroded pipes in a nuclear secondary loop piping system. Based on the first order second moment method ( JC) with different failure pressure models, the seismic reliability of corroded pipes in a nuclear secondary loop piping system is calculated in order to demonstrate the dynamic variation of the seismic reliability index induced by FAC.