So we're talking about a reactor that has a break in the primarycoolingsystem and what is a double ended guillotine break?
我们谈论的是，一个反应堆出现了破裂，在主系统的冷却系统，还有两端，闸床的破裂是什么？
2
They are aimed at either cleaning the water in the primarysystem, providing separate shutdown cooling functions, water chemistry, charging and volume control, makeup water.
它们的目标是清理主系统的水，提供分离的停止，冷却的功能，水化学，装料及容量控制，补充水。
3
And you'll also note in a PWR we have three different cooling systems; the primary, the secondary and the third system which is the system that actually goes into the environment.