哈尔滨工程大学学报2025，Vol.46Issue(5)：1039-1046,8.DOI:10.11990/jheu.202311024
基于脉冲源中子多重性的钚质量测量模拟研究
Simulative study on plutonium mass measurement using neutron multiplicity of a pulse source
摘要
Abstract
To integrate a pulsed neutron source into the neutron multiplicity counting method,we introduce the dif-ferential die-away technique to explore its potential combination with the counting method.A simulation model of the PROMATHEE 6 differential attenuation measurement system was constructed using the Geant4 toolkit,with per-formance verification and parameter selection completed.By establishing a scaling relationship between the induced fission rate and the induced fission rate per unit effective 239 Pu mass,the neutron multiplicity counting analysis method was employed to simulate the mass of special nuclear materials within the pulse interrogation interval.The results demonstrate that,based on the differential die-away technique,the neutron multiplicity counting method can accurately estimate the mass of 239 Pu metal samples with a mass enrichment of 93.89%.For plutonium metal sam-ples with a 239 Pu mass ranging from 0.01 to 10 g,the relative deviation between the simulated results and the actual effective 239 Pu mass initially decreases and then increases,with a maximum deviation not exceeding 25%.The effects of the multiplication coefficient,multiplicity moment,and gate width on mass accountancy results are signifi-cant and cannot be overlooked.These findings offer valuable reference data for applying pulsed neutron sources in neutron multiplicity counting methods and contribute meaningfully to advancements in nuclear safeguard measure-ment technology.关键词
主动质询/差分衰减/中子多重性/Geant4 工具包/脉冲中子源/蒙特卡罗模拟/核保障/特殊核材料Key words
active interrogation/differential die-away/neutron multiplicity/Geant4 toolkit/pulsed neutron source/Monte Carlo simulation/nuclear safeguard/special nuclear material分类
能源科技引用本文复制引用
雍金龙,宋玉收,侯英伟,刘辉兰..基于脉冲源中子多重性的钚质量测量模拟研究[J].哈尔滨工程大学学报,2025,46(5):1039-1046,8.基金项目
国家自然科学基金项目(12227810). （12227810）
