The safe and stable operation of lead bismuth fast reactor is closely related to the heat dissipation performance between the primary and secondary sides of the heat exchanger.In this study,the steady-state and transient coupled distribution parameter model of once-through steam generator(OTSG)based on lead bismuth fast reactor is established.The distribution difference of thermal and hydraulic characteristics in OTSG under different load conditions is analyzed and compared,and the influence of primary enthalpy and flow disturbance of lead bismuth fast reactor on the dynamic heat dissipation performance of heat exchanger is further revealed.The steady-state results show that the temperature drop on the primary side of the lead bismuth fast reactor was mainly concentrated in the subcooled boiling and nucleate boiling regions,and the decrease in the secondary side load can cause the temperature jump on the tube wall.The dynamic results show that the primary side inlet enthalpy only decreases by 5％under design conditions,which may lead to the lead bismuth reactor cycle entering accident conditions after 90 seconds.The relevant results provide valuable suggestions for the study of OTSG flow and heat transfer characteristics and structural design optimization of the lead bismuth fast reactor.
关键词
铅铋快堆/直流蒸汽发生器/热工水力分析/分布参数模型
Key words
Lead bismuth fast reactor/Once-through steam generator/Thermal-hydraulics analysis/Distributed parameter model
维普
万方数据