Research for axial power distribution control of a space nuclear reactor based on nonlinear model

doi:10.1016/j.anucene.2021.108917

	Research for axial power distribution control of a space nuclear reactor based on nonlinear model
	Zhao, Chengxuan 1,2,3; Yang, Xiao 2; Yang, Minghan 2; Wang, Jianye 2; Chen, Shuai 2
刊名	ANNALS OF NUCLEAR ENERGY
	2022-04-01
卷号	168
关键词	Power distribution control Integral Lyapunov function Distributed parameter control Exponential stability Space nuclear reactor
ISSN号	0306-4549
DOI	10.1016/j.anucene.2021.108917
通讯作者	Yang, Xiao(yyxx88@mail.ustc.edu.cn)
英文摘要	During the operating process of a space nuclear reactor, once the local overload of heat energy occurs in the core, the corresponding fuel elements would be damaged and the lifespan of the reactor would be seriously reduced. In fact, the heat flux at any point in the core is proportional to the neutron flux density. A sufficiently flat axial neutron flux density distribution can protect the fuel assembly from frequent load changes. It is so clear that the axial power distribution control is crucial for the safe and stable operation of the space nuclear reactor. However, the space nuclear reactor is a distributed parameter system, which brings great challenges to the traditional lumped parameter control methods. In this paper, a distributed parameter control method is proposed to suppress the initial neutron flux peaks and realize the exponential stability of the neutron flux distribution control system. First of all, the spatiotemporal model of the reactor core based on the neutron diffusion equation is established. Then, the stability analysis of the control law for the neutron flux distributed parameter control problem is performed by constructing the Lyapunov function. The optimization technique based on the spatial differential linear matrix inequality is used to approximate the solution of the suboptimal integral control law. The control law is implemented by rotating drum, and the flat distribution of the axial power of the core is realized by the distributed parameter control. Finally, the numerical results are provided to validate the feasibility of the proposed control scheme.(c) 2021 Elsevier Ltd. All rights reserved.
资助项目	Key Research Program of the Chi-nese Academy of Sciences[ZDRW-KT-2019-1-0202]
WOS关键词	PDE SYSTEMS
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000806349900009
资助机构	Key Research Program of the Chi-nese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131191]
专题	中国科学院合肥物质科学研究院
通讯作者	Yang, Xiao
作者单位	1.Anhui Univ Sci & Technol, Huainan 232001, Anhui, Peoples R China 2.Chinese Acad Sci, Inst Nucl Energy Safety Technol, Hefei Inst Phys Sci, Hefei 230031, Anhui, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Chengxuan,Yang, Xiao,Yang, Minghan,et al. Research for axial power distribution control of a space nuclear reactor based on nonlinear model[J]. ANNALS OF NUCLEAR ENERGY,2022,168.
APA	Zhao, Chengxuan,Yang, Xiao,Yang, Minghan,Wang, Jianye,&Chen, Shuai.(2022).Research for axial power distribution control of a space nuclear reactor based on nonlinear model.ANNALS OF NUCLEAR ENERGY,168.
MLA	Zhao, Chengxuan,et al."Research for axial power distribution control of a space nuclear reactor based on nonlinear model".ANNALS OF NUCLEAR ENERGY 168(2022).