Japan Geoscience Union Meeting 2018

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[EE] Oral

M (Multidisciplinary and Interdisciplinary) » M-AG Applied Geosciences

[M-AG31] CTBTO - Four IMS Technologies for Detecting Nuclear Explosion on the Planet and Their Applications to Earth Science

Thu. May 24, 2018 3:30 PM - 5:00 PM 301A (3F International Conference Hall, Makuhari Messe)

convener:Nurcan Meral Özel (Comprehensive Nuclear-Test-Ban Treaty Organization), Hiroyuki Matsumoto(Japan Agency for Marine-Earth Science and Technology), Yosuke Naoi(国立研究開発法人日本原子力研究開発機構, 共同), Lassina Zerbo(Comprehensive Nuclear-Test-Ban Treaty Organization), Chairperson:Meral Özel Nurcan(Comprehensive Nuclear-Test-Ban Treaty Organization), Matsumoto Hiroyuki(JAMSTEC), Naoi Yosuke(JAEA)

4:45 PM - 5:00 PM

[MAG31-06] Detection of Artificial Radionuclides in CTBT Radionuclide Stations

★Invited Papers

*Yuichi Kijima1, Yoichi Yamamoto1 (1.Japan Atomic Energy Agency)

JAEA as Japanese NDC-2 is in charge of monitoring radionuclide related to CTBT and performs analysis of radionuclide data and Atmospheric Transport Modelling (ATM) simulation to investigate the diffusion of radioactive plume. About two months later after the third nuclear test in DPRK on 12 February 2013 (DPRK-3), xenon-133 and xenon-131m were detected simultaneously far beyond normal background level of the activity concentration at the CTBT Takasaki station in Japan. From the aspect of isotope ratio and the result of ATM simulation, it is highly possible that these radioxenon isotopes are originated from DPRK-3. And there were detections of balium-140 and lanthanum-140 at the CTBT Okinawa station in Japan in 2010, and rutenium-106 in several CTBT stations in Eurasia in 2017. We report on these detections of artificial radionuclides in CTBT radionuclide stations.