The nuclear fuel is encased in hard alloys to construct fuel rods; the reactor core that these rods makeup, and the water it sits in, are contained within a steel pressure vessel.
核燃料的形式是在硬合金包裹下的燃料棒；并且这些燃料棒放在水中，外面还有一层钢压力容器。
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This pump supplies make-upwater to maintain the volume when the primary reactor coolant has contracted due to decrease of load.