现代应用物理2025，Vol.16Issue(2)：94-100,7.DOI:10.12061/j.issn.2095-6223.202408014
核热推进气冷堆堆芯物理特性
Physical Characteristics of Nuclear Thermal Propulsion Gas-Cooled Reactor
摘要
Abstract
The propulsion system is a critical factor determining the performance of an aircraft.Aircraft equipped with nuclear thermal propulsion(NTP)system can overcome the current performance nimitations of chemical fuel propulsion due to the extremely high energy density of nuclear energy.Based on the XNJ-140E core scheme in the United States,a honeycomb core thermal propulsion gas-cooled reactor with a thermal power of 5 MW is proposed in this paper.The core physics of the reactor is simulated and analyzed by using Monte Carlo code,to obtain the reactivities and neutron distribution characteristics of the core.The thermal neutron absorption performance of the absorbing material coatings is studied,and the appropriate absorbing material coatings is applied to optimize the power distribution.After optimization,the radial power non-uniformity coefficients decreased from 1.285 to 1.209.In addition,the criticality safety of the NTP reactor under drop accidents is studied,and the corresponding plans are proposed.关键词
核热推进/堆芯设计/中子学分析/掉落临界安全Key words
nuclear thermal propulsion/core design/neutron analysis/drop criticality safety分类
能源科技引用本文复制引用
张自牧,陈立新,姜夺玉,郭辉..核热推进气冷堆堆芯物理特性[J].现代应用物理,2025,16(2):94-100,7.基金项目
国家自然科学基金资助项目(12205237,12275219) （12205237,12275219）
