CEFR在首次临界试验完成后,由净堆临界装载向运行装载冷态过渡。完成一系列物理试验后,在提升功率之前,逐渐向运行装载热备用态过渡(此时,反应堆的功率仍为零)。这时,反应堆的介质温度从250℃上升到360℃。由于堆芯材料温度和钠冷剂温度的变化引起了钠密度、燃料组件尺寸、钢反 CEFR transition from net critical load to cold operational load after the completion of the first critical test. After a series of physical tests have been completed, the transition to the operational loading hot standby state (at which time the reactor power is still zero) is gradually advanced before boosting the power. At this point, the temperature of the reactor medium rose from 250 ° C to 360 ° C. Due to variations in core material temperature and sodium coolant temperature, sodium density, fuel assembly size,