摘要
锂(Li)是一种重要的空间核反应堆传热工质,采用Li冷却的大功率空间堆是未来空间核电推进任务的理想能源之一。Li在受中子辐照时会产生氦(He)。在Li冷空间堆中,Li产生的He会对一回路的热工水力造成不利影响,需要设置气体分离器对其进行收集。因此,对Li辐照产He的计算和研究是Li冷空间堆设计的重要环节。为详细研究Li冷空间堆的产He行为,构建了兆瓦级Li冷空间堆LISA,采用三维蒙特卡罗程序MCNP,对反应堆中Li产He行为进行了计算,比较了不同反应以及不同区域的产He量,研究了Li-7丰度以及中子能谱对产He的影响,并基于研究结果提出了Li冷空间堆的优化思路。本研究的方法和结论可为Li冷空间堆的设计研究提供有益参考。
Lithium(Li)is an important coolant used for space reactor.High-power Li-cooled space reactor is an ideal power source for the future space nuclear electric propulsion missions.Helium(He)will be produced when Li is under neutron irradiation.The production of He will be harmful for the thermal hydraulics performance of the primary coolant system.Gas separators are needed to accumulate the He.Thus the calculation and research of He production are imperative for the design of Li cooled space reactor.In order to perform a detailed research,a MW Li cooled space reactor named LISA is designed.MCNP is used to calculate the He yield of LISA.Comparison of the He yields of different reactions and different areas is carried out.And the affection of He yield by Li-7 abundance and neutron spectrum is studied.Besides,the improvement suggestions for the reactor design are proposed.The method and conclusion presented in this research can be used as a helpful reference for the research and design of other Li cooled space reactors.
作者
安伟健
霍红磊
李来冬
汪新智
张昊春
AN Weijian;HUO Honglei;LI Laidong;WANG Xinzhi;ZHANG Haochun(Division of Reactor Engineering Technology Research,China Institute of Atomic Energy,Beijing,102413,China;School of Energy Science&Engineering,Harbin Institute of Technology,Harbin of Heilongjiang Prov.150001,China)
出处
《核科学与工程》
CAS
CSCD
北大核心
2020年第4期696-702,共7页
Nuclear Science and Engineering
关键词
空间堆
锂
辐照产氦
Space Reactor
Lithium
Helium Production Due To Radiation
