Different kinds of thermohydraulic phenomena during startup of gravity boron injection system (GBIS) of the 200MW nuclear heating reactor (NHR200) were described.
描述了200MW核供热反应堆（NHR-200）重力注硼系统启动时发生的各种热工水力学现象。
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The mechanism and process of thermal mixing of fluid with different temperature in a straight pipe were studied, which has general significance in nuclear reactor thermohydraulic process.