CURRENT STATUS OF A JAEA DEVELOPMENT PROGRAM ON NUCLEAR AND
RADIOACTIVE MATERIALS DETECTION TECHNIQUES IN MAJOR PUBLIC
EVENTS

Year
2023
Author(s)
M. Koizumi - Integrated Support Center for Nuclear Security and Nuclear Nonproliferation, Japan Atomic Energy Agency
T. TAKAHASHI - Integrated Support Center for Nuclear Nonproliferation and Nuclear Security (ISCN), Japan Atomic Energy Agency (JAEA), Japan
K. HIRONAKA - Integrated Support Center for Nuclear Nonproliferation and Nuclear Security (ISCN), Japan Atomic Energy Agency (JAEA), Japan
T. MOCHIMARU - Integrated Support Center for Nuclear Nonproliferation and Nuclear Security (ISCN), Japan Atomic Energy Agency (JAEA), Japan
I. YAMAGUCHI - Integrated Support Center for Nuclear Nonproliferation and Nuclear Security (ISCN), Japan Atomic Energy Agency (JAEA), Japan
Y. KIMURA - Integrated Support Center for Nuclear Nonproliferation and Nuclear Security (ISCN), Japan Atomic Energy Agency (JAEA), Japan
M. TANIGAKI - Institute for Integrated Radiation and Nuclear Science, Kyoto Univ., Japan
H. MASAKI - Graduate School of Informatics, Kyoto Univ., Japan
H. HARADA - Graduate School of Informatics, Kyoto Univ., Japan
J. Goto - Institute for Research Promotion, Niigata Univ., Japan
H. YAMANISHI - Atomic Energy Research Institute, Kindai University, Japan
G. WAKABAYASHI - Atomic Energy Research Institute, Kindai University, Japan
File Attachment
finalpaper_279_0428125118.pdf512.55 KB
Abstract
To prevent nuclear terrorism in major public events, the JAEA is developing radiation detector systems, which survey nuclear and radioactive materials left in a public space. The system is various combinations of a radiation detector, a camera, localization devices for in-and-outdoor survey, and an unmanned vehicle. A network device, Wi-SUN FAN, is being tested to perform efficient survey with several devices. In addition, an artificial intelligent program is being developed to diagnose an observed gamma-ray spectrum to identify U-235 and to eliminate false alert. A fast neutron detection system with a PSD plastic scintillator is also being developed for neutron emitter survey. Although the detector is sensitive to both fast neutrons and gamma rays, fast neutron events can be chosen by using a pulse shape evaluation technique. Taking the advantage of angular dependence of a detector, a detector system consisting of two rod-shaped detectors was numerically studied. The system can find the direction of a radioactive source. This report overviews the development project.