密度锁工作特性的实验研究

Experimental Study on Working Characteristics of Density Lock

介绍了密度锁的工作原理,并设计搭建了实验装置,研究了稳态工况和主泵停转事故时密度锁的工作特性。结果表明,在稳态工况下,密度锁能长期保持关闭,从而将主回路和余热排出回路隔开,此时,余热排出回路处于非工作状态,不会影响反应堆的正常工作。当发生主泵停转事故时,密度锁能迅速打开,使主回路和余热排出回路连通。余热排出回路会建立自然循环,且足以带走剩余热量。

The working principle of density lock was introduced in this paper,and the experimental loop was built so that researches on working performance of density lock in the system were done at steady-state operation and pump trip conditions.The results show that at steady-state operation conditions,density lock can keep close in a long run, which will separate passive residual heat removal circuit from primary circuit.As a result,passive residual heat removal circuit is in the non-operating conditions,which does not influence normal operation of reactors.At the pump trip conditions,density lock can be automatically opened quickly,which will make primary and passive residual heat removal system communicated.The natural circulation is well established in the two systems,and is enough to ensure removal of residual heat.