primary component cooling water system 核岛设备冷却水系统
They are aimed at either cleaning the water in the primary system, 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。
When you have an event, the reactor is operating at full power, you blowdown the primary coolant which is hot, you start injecting emergency core cooling water which is cold.
当你进行的时候，反应堆就会用全部的动力，运行，你排放出初冷却剂，那是热的，你开始注入紧急核心冷却水，那是冷的。
Then you have the reactor vessel and piping which is the primary boundary which has an eight to ten inch thick reactor vessel and three to four inch thick steel piping to contain the cooling water.
你们会有反应堆糟和管道，它们是主边界，事故8到10英寸厚的反应堆槽，还有3到4英寸厚的钢管，那是用来装冷却水的。
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