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快中子增殖堆因为采用金属钠作为冷却剂,其与水比较,热容量要小得多,所以冷却剂的温度变化较大。为了较为精确地了解冷却剂的温度变化,并据此掌握容器内部的
The fast neutron breeder uses metallic sodium as a coolant, which has a much smaller heat capacity than water and therefore has a large change in coolant temperature. In order to know the temperature change of the coolant more accurately and to grasp the inside of the container accordingly