堆芯补箱(CMT)是模拟反应堆系统非能动补水实验装置的一个重要组成部分.补水实验是假设当反应堆一回路压力边界上发生踊口事故时,为防止堆芯汽化,将补水箱内的水注入堆芯的过程.当开始补水时,补水箱承受恶劣的热边界条件,随着补水箱内部的水位下降,其内部的蒸汽温度和压力都随时间发生变化,这种动态变化的边界条件,使应力分析的全过程复杂化-Core fill tank (CMT) is a simulation of the reactor system, the non-dynamic replenishment experimental device is an important component. Replenishment experiment is assumed that a loop reactor pressure boundary, when the accident occurred on leap mouth, in order to prevent the core of vaporization, will fill water tank the water into the core process. When you start overtime pay, the makeup tank to withstand harsh thermal boundary conditions, with the decline in water level inside the tank fill its internal steam temperatures and pressures have changed over time, this dynamic change boundary conditions, so that the whole process stress analysis of complex