一体化快堆堆内净化用高温浸没泵性能试验研究  

Performance Test of High-temperature Immersion Pump for In-reactor Purification of Integrated Fast Reactor

作　　者：李煦[1] 耿晓 姚泽文 禹春利[1] 吴鹏 於根芳 LI Xu;GENG Xiao;YAO Zewen;YU Chunli;WU Peng;YU Genfang(Department of Nuclear Engineering Design,China Institute of Atomic Energy,Beijing 102413,China;Hangzhou Zhefu Nuclear Power Equipment Company,Hangzhou 311504,China)

机构地区：[1]中国原子能科学研究院核工程设计研究所,北京102413 [2]杭州浙富核电设备有限公司,浙江杭州311504

出　　处：《原子能科学技术》2025年第S1期111-119,共9页Atomic Energy Science and Technology

基　　金：中核集团集中研发项目。

摘　　要：在中国原子能科学研究院的一体化快堆项目中,为实现一回路钠不出堆,防止放射性钠泄漏,采用堆内冷阱净化钠中杂质,使一回路的钠在堆容器内部完成净化。为适应堆内冷阱净化需求,需重新研发堆内钠泵送装置。本文设计了适用于堆内冷阱的高温浸没泵,浸没泵从钠池中抽钠,通过顶部出口将钠输入堆内冷阱内筒中,为钠在冷阱内的循环净化提供稳定、可调节的动力。针对高温浸没泵样机,开展了模拟堆内钠环境下的性能试验,得到了浸没泵在不同电力条件时的流量-扬程曲线、流量-效率曲线、流量-功率曲线,以及关键部件温度等试验值,并将试验结果与仿真计算结果进行分析比较。结果表明,所研发的浸没泵样机在高温(360℃)钠介质环境、额定工况下,能够满足流量8 m^(3)/h、扬程0.2 MPa的工程需求,同时实际绕组线圈温度低于安全运行温度(450℃),满足设计要求。上述结果为进一步服务堆内净化提供了支持。In the integrated fast reactor project of the China Institute of Atomic Energy,in order to keep the primary circuit sodium within the reactor and prevent radioactive sodium leakage,an in-reactor cold trap is used to purify the impurities in the sodium,enabling the purification of the primary circuit sodium inside the reactor vessel.Considering that it is impossible to use the pressure difference to feed sodium into the equipment,the external electromagnetic pump can no longer meet the usage requirements.The electromagnetic pump needs to be installed in the sodium pool,and the pump trench can be filled with sodium when the equipment is put in.Therefore,to meet the purification requirements of the in-reactor cold trap,it is necessary to develop a new in-reactor sodium pumping device.The immersion pump needs to be installed at the bottom of the cold trap,sucking sodium from the sodium pool and injecting it into the inner cylinder of the in-reactor cold trap through the top outlet,providing stable and adjustable power for the cyclic purification of sodium in the cold trap.A high-temperature immersion pump suitable for the in-reactor cold trap was designed in this paper.The immersion pump sucks sodium from the sodium pool and injects it into the inner cylinder of the in-reactor cold trap through the top outlet,providing stable and adjustable power for the cyclic purification of sodium in the cold trap.For the prototype of the high-temperature immersion pump,performance tests were carried out in a simulated in-reactor sodium environment.The flow-head curve,flow-efficiency curve,flowpower curve of the immersion pump under different power conditions,as well as the test values of the temperatures of key components were obtained,and the test results were analyzed and compared with the simulation calculation results.The results show that the developed prototype of the immersion pump can meet the engineering requirements of a flow rate of 8 m^(3)/h and a head of 0.2 MPa under the hightemperature(360℃)sodium medium environm

关 键 词：一体化快堆 浸没泵 性能试验 仿真计算 

分 类 号：TL43[核科学技术—核技术及应用]