Transient Numerical Investigation of Direct Vessel Injection for AP1000 under Pressurized Thermal Shock
-
摘要: 基于计算流体动力学(CFD)分析方法,采用流固共轭传热方式,对非能动堆芯冷却系统(PXS)的堆芯补水箱(CMT)热态功能试验、CMT注入同时自动减压系统(ADS)动作、蓄压安注箱(ACC)安注后CMT再注入以及常规余热排出系统运行等4种工况下反应堆压力容器(RPV)环腔内流动传热状态进行瞬态数值模拟,研究RPV壁面温度瞬态变化以及环腔下降段内流体的混合特性。结果表明:4种工况下直接安注(DVI)接管管嘴与RPV内壁面相交斜面处冷却水混合剧烈,冷段是否有流体注入环腔对其内流体温度分布变化影响巨大,且DVI接管管嘴局部区域将发生较大的温度变化。Abstract: The transient temperature and the transient mixing characteristics of RPV downcomer in AP1000 under four kinds of operation condition（CMT Hot Functional Test, CMT Injection and ADS, CMT Recirc with ACC / IRWST Injection and Normal RHR Operation） has been investigated using the computational fluid dynamics（CFD） method combined with the conjugate heat transfer computing method. Results show that the coolant mixed strongly at the intersection of DVI-Nozzle and the inner wall surface of RPV under each operating condition. The coolant from the cold leg decide how the distribution of fluid temperature in downcomer of RPV changed. And three typical location of DVI-Nozzle experience a large step change in temperature under each operation condition.
-
计量
- 文章访问数: 16
- HTML全文浏览量: 7
- PDF下载量: 0
- 被引次数: 0
下载:
