Nondestructive and active interrogation system for special nuclear material:proof of principle and initial results  

作　　者：Mahmoud Bakr Kai Masuda Yoshiyuki Takahashi Tsuyoshi Misawa Norio Yamakawa Tomas Scott 

机构地区：[1]Institute of Advanced Energy,Kyoto University,Gokasho,Uji,Kyoto 611‑0011,Japan [2]School of Physics,University of Bristol,Bs81TL Tyndall Avenue,Bristol,UK [3]Physics Department,Faculty of Science,Assiut University,Assiut 71516,Egypt [4]Research Reactor Institute,Kyoto University,2 Asashiro‑Nishi,Kumatori,Osaka 590‑0494,Japan [5]Pony Industry Co.Ltd.,2‑3‑6 Kitakyuhoji‑Machi,Chuo‑Ku,Osaka 541‑0057,Japan [6]Astral Neutronics LTD,Unit H5,Hallen,Bristol BS107SB,UK

出　　处：《Nuclear Science and Techniques》2024年第5期216-225,共10页核技术（英文）

基　　金：supported by Special Coordination Funds for Promoting Science and Technology,sponsored by Japan’s Ministry of Education,Culture,Sports,Science and Technology(MEXT).

摘　　要：Herein,we employ the threshold energy neutron analysis(TENA)technique to introduce the world's first active interrogation system to detect special nuclear materials(SNMs),including U-235 and Pu-239.The system utilizes a DD neutron generator based on inertial electrostatic confinement(IEC)to interrogate suspicious objects.To detect secondary neutrons produced during fission reactions induced in SNMs,a tensioned metastable fluid detector(TMFD)is employed.The current status of the system's development is reported in this paper,accompanied by the results from experiments conducted to detect 10 g of highly enriched uranium(HEU).Notably,the experimental findings demonstrate a distinct difference in the count rates of measurements with and without HEU.This difference in count rates surpasses two times the standard deviation,indicating a confidence level of more than 96% for identifying the presence of HEU.The paper presents and extensively discusses the proof-of-principle experimental results,along with the system's planned trajectory.

关 键 词：Special nuclear materials Uranium detection Inertial electrostatic confinement fusion TENA HEU CTMFD 

分 类 号：TL613[核科学技术—核技术及应用]