【作者】 王琰； 王鼎渠； 贾海军；

【Author】 Wang Yan;Wang Dingqu;Jia Haijun;Institute of nuclear and new energy technology,Tsinghua University;Collaborative Innovation Center of Advanced Nuclear Energy Technology;Key Laboratory of Advanced Reactor Engineering and Safety,Ministry of Education of China;

【机构】 清华大学核能与新能源技术研究院； 先进核能技术协同创新中心； 先进反应堆工程与安全教育部重点实验室；

【摘要】 一体化反应堆环腔引水管断裂后,存在环腔液位比堆芯液位下降缓慢的现象,这增大了堆芯裸露的风险,影响了反应堆的安全运行。本文利用简化模型对一体化反应堆进行建模,采用Relap5程序对反应堆环腔液位缓降现象进行数值模拟,并对其机理进行分析。针对该现象,提出了一种增设连通管道的解决方法,对不同的管道阻力系数进行模拟计算。结果表明该方法可以有效降低堆芯液位的下降速度,且阻力系数越小,连通管的作用越明显。更多还原

【Abstract】 There is a slowly descending phenomenon of liquid level in the ring coelom of integrated type reactor when the pipe of the ring coelom breaks,it has a direct influence on the security of the reactor. In the current study, a simplified reactor model which was established by Relap5 is used to calculate and analyzed the phenomenon. Then we come up with one solution by using a connecting pipe. The result shows that this solution reduced the descent velocity of the liquid level in the reactor cocre on a large scale. Besides,we discuss the results by changing the resistance coefficient of the pipe, which has a favorable capacity to reduce the descent velocity when the resistance coefficient is small.更多还原