摘要
RELAP5和MELCOR程序结合,计算安全壳和非能动安全壳冷却系统(PCS)的瞬态响应特性,并对影响系统运行的压力、冷凝器换热面积和冷热源高度差等主要参数进行分析。结果表明:PCS能够在一定时间内有效实现安全壳降温、降压,但长期阶段仍需进行补水降温的操作。降低压力可以提高换热功率,但有可能产生流动不稳定性现象。通过增加冷凝器换热面积能够提高换热功率,但冷却水箱温度较高时影响不明显。在本文给定边界条件下,无论是单相还是两相自然循环,冷热源高度差变化对换热功率的影响都不显著。
By using RELAP5 and MELCOR, transient behaviors of containment and PCS were investigated. The Influences of various parameters, such as pressure, condenser area and loop height were also studied. The results show that the heat in the containment can be effectively removed by PCS in a period of accident without spray. However the tank water should be made up and cooled for the long run. The heat transfer power of two-phase flow case is always higher, and varies more substantially with pressure, than that of one-phase flow case under the same boundary temperatures. However, flow instability may occur for two-phase flow case. By increasing the condenser area, the heat transfer is enhanced. The influence is less insignificant when the tank temperature is relatively high. It is also found that for both one-phase and two-phase flow, the change of loop height has little effect upon the heat transfer power under the given boundary condition in this studv.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2014年第6期31-36,共6页
Nuclear Power Engineering
