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Journal Articles

Development of on emergency-use stack gas monitor

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Nippon Genshiryoku Gakkai-Shi, 29(7), p.656 - 663, 1987/07

 Times Cited Count:0 Percentile:100(Nuclear Science & Technology)

no abstracts in English

Oral presentation

JAEA's recent activities related to CTBT verification regime

Yamamoto, Yoichi; Kijima, Yuichi; Tomita, Yutaka

no journal, , 

This presentation summarizes JAEA's recent activities related to CTBT verification regime. To establish the global verification regime of CTBT for the nuclear tests, JAEA has been operating provisionally three facilities (two monitoring stations and one radionuclide laboratory) of the CTBT international monitoring system and a national data center for radionuclide monitoring. For the 6th nuclear test conducted by North Korea in September 2017, JAEA reported the analysis and evaluation results of data observed at the CTBT radionuclide monitoring stations to the national government etc. in a timely manner and thereby contributed to the evaluation by the national government based on the CTBT operation system in Japan. For the purpose of strengthening CTBTO's detection capability for nuclear tests, JAEA started new noble gas joint measurement project with CTBTO in Horonobe (Hokkaido) and Mutsu (Aomori) based on the Japanese government contribution in 2017.

Oral presentation

Importance of noble gas monitoring in CTBT verification technology and observation results in Takasaki radionuclide monitoring station

Yamamoto, Yoichi; Kijima, Yuichi; Tomita, Yutaka

no journal, , 

Radionuclide monitoring is the only way to judge whether the target explosion event was a nuclear test. Among the radionuclides produced by the nuclear explosion, the noble gases are particularly important because they are inert and more likely to leak to the ground rather than other substances in an underground nuclear test. Only 4 radioxenon isotopes as the noble gases are monitored for the CTBT verification. It was after the first nuclear test of North Korea in October 2006, when a radioxenon monitoring system installed at the Takasaki radionuclide monitoring station in Japan and the radioxenon monitoring has been carried out since January 2007. We report on the past observation results of the radioxenon at the Takasaki radionuclide monitoring station and the characteristics of radioxenon background.

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