Japan Geoscience Union Meeting 2021

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[E] Oral

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

[M-AG37] CTBT IMS Technologies for Detecting Nuclear Explosion and Their Applications to Earth Science

Sun. Jun 6, 2021 3:30 PM - 5:00 PM Ch.20 (Zoom Room 20)

convener:Nurcan Meral Ozel(Comprehensive Nuclear-Test-Ban Treaty Organization), Hiroyuki Matsumoto(Japan Agency for Marine-Earth Science and Technology), Dirk Metz(Japan Agency for Marine-Earth Science and Technology), Yosuke Naoi(Japan Atomic Energy Agency), Chairperson:Nurcan Meral Ozel(Comprehensive Nuclear-Test-Ban Treaty Organization), Hiroyuki Matsumoto(Japan Agency for Marine-Earth Science and Technology), Dirk Metz(Japan Agency for Marine-Earth Science and Technology)

4:30 PM - 4:45 PM

[MAG37-05] Atmospheric dispersion analysis for source term estimation of Xe-133 high-concentration detection events observed at the noble gas monitoring station in Takasaki regarding CTBT and two temporary experimental systems

*Akiko FURUNO1, Yuichi Kijima1, Yutaka Tomita1, Yoichi Yamamoto1 (1.Japan Atomic Energy Agency)

Keywords:CTBT, atmospheric dispersion simulation, source term estimation, high-concentration detection events

This research aims at source term estimations of high-concentration detection events of Xe-133, which were observed at the CTBT IMS (International Monitoring System) Takasaki radionuclide monitoring station from the viewpoint of atmospheric dispersion analysis. Japan Atomic Energy Agency operates JPX38 in the Takasaki radionuclide station for noble gas monitoring, and conducts temporary measurement project of radioxenon at Horonobe in Hokkaido (JPX81) and Mutsu in Aomori (MUX88) as a part of the noble gas joint measurement project with CTBTO. The high-concentration detection events were frequently occurred not only at the JPX38 but also at the JPX81from the end of 2020 to January 2021. In the presentation, we will describe the source term estimation analysis of these high-concentration detection events, and discuss the relationship of the events between two stations.