摘要
在军控核查中,核部件的质量、丰度、年龄属性需采用无损方法进行核查,NPL-NMC系统是一套利用中子多重性测量核部件质量属性的装置,为建立完善的属性测量系统,还需在NPL-NMC系统的基础上建立γ测量子系统。本文通过设计γ测量子系统在NPL-NMC系统上的布局及对中子屏蔽的优化,使系统能对铀部件的丰度、年龄属性进行测量。模拟计算结果表明,该γ测量子系统能很好地满足军控核查对铀部件丰度、年龄属性测量的要求。
The non-destructive analysis is usually employed to measure attributes of mass,isotopic ratio and age for nuclear component in arm control and verification scenario.The NPL-NMC system was developed with making use of neutron multiplicity principle for measuring mass attribute of plutonium and HEU in arm control and verification scenario.To build a comprehensive verification system for nuclear component,attributes of isotopic ratio and age for plutonium and HEU needed to be confirmed by the non-destructive gamma measurement.Therefore,agamma measurement sub-system based on the NPL-NMC system was modeled and the neutron shield for protecting the gamma system from neutron damage was optimized.The isotopic ratio and age attributes for HEU could be analyzed.The calculation result indicates that it is effective for attribute measurement for isotopic ratio and age of HEU,which satisfies the requirement of establishing an integrate attribute measurement system in arm control and verification scenario.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2016年第4期698-704,共7页
Atomic Energy Science and Technology