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Kimura, Yoshiki; Matsui, Yoshiki; Tomikawa, Hirofumi
ITWG Nuclear Forensics Update (Internet), (15), p.4 - 7, 2020/06
Kimura, Yoshiki; Matsui, Yoshiki; Yamaguchi, Tomoki; Matsumoto, Tetsuya*; Umino, Yuji*; Hosoi, Masaharu*; Shinohara, Nobuo
no journal, ,
Any nuclear security event involving nuclear and other radioactive materials outside of regulatory control (MORC) has the potential to have severe consequences for public health, the environment, the economy and society. Each state has a responsibility to develop national nuclear security measures to respond to such an event, and this includes a nuclear forensics capability. In Japan, national nuclear forensics capability building efforts mainly based on research and development have been conducted. Most of that work is undertaken at the Integrated Support Center for Nuclear Non-proliferation and Nuclear Security (ISCN) of the JAEA in close cooperation with other competent authorities. The ISCN has made increased contributions to the enhancement of international nuclear security by establishing technical capabilities in nuclear forensics and sharing the achievements with the international community. In this paper, current status and future prospects on nuclear forensics capability building and technology development by the ISCN has been presented.
Matsui, Yoshiki; Umino, Yuji*; Shinohara, Nobuo; Kimura, Yoshiki
no journal, ,
Integrated Support Center for Nuclear Nonproliferation and Nuclear Security (ISCN) of JAEA has been developing nuclear forensics techniques to identify the origin and intended use of nuclear and radioactive materials, and also conducting uranium age-dating as part of this development. Uranium age-dating at ISCN can estimate when the uranium was refined from its raw material by measuring the Th/ ratio of the uranium sample. In this paper, we report the results of uranium age-dating on uranium standards to verify the applicability of the age-dating method.
Matsui, Yoshiki; Kimura, Yoshiki; Yamaguchi, Tomoki; Matsumoto, Tetsuya*; Umino, Yuji*; Hosoi, Masaharu*; Shinohara, Nobuo
no journal, ,
Nuclear and other radioactive materials outside of regulatory control (MORC) can trigger nuclear security events with severe environmental and economic consequences. In order to deal with such threats, it is necessary to strengthen international nuclear security measures, including nuclear forensics. The development of nuclear forensics technology in Japan is led by the Integrated Support Center for Nuclear Non-proliferation and Nuclear Security (ISCN) of the Japan Atomic Energy agency (JAEA) and is being carried out under domestic and international cooperation. By actively disseminating the results of its technology development to the domestic and international communities, ISCN is contributing to the improvement of nuclear forensics capabilities not only in Japan but also internationally. The present paper has discussed the status of the nuclear forensic laboratory capability in the ISCN.
Matsui, Yoshiki; Kimura, Yoshiki; Umino, Yuji*; Hosoi, Masaharu*; Matsumoto, Tetsuya*; Shinohara, Nobuo; Yamazaki, Hitoshi; Yamaguchi, Tomoki
no journal, ,
Matsui, Yoshiki; Kimura, Yoshiki; Umino, Yuji*; Hosoi, Masaharu*; Matsumoto, Tetsuya*; Shinohara, Nobuo; Yamazaki, Hitoshi; Yamaguchi, Tomoki
no journal, ,
The Integrated Support Center for Nuclear Nonproliferation and Nuclear Security (ISCN) of the Japan Atomic Energy Agency (JAEA) is developing technologies for nuclear forensics to identify the origin and intended use of nuclear and radioactive materials. In order to share the experience on nuclear forensics analysis and to improve analytical techniques in the international community, the Nuclear Forensics International Technical Working Group (ITWG) regularly holds the Collaborative Materials Exercise (CMX). The ISCN participated in the 7th exercise (CMX-7) this time. This paper reports the experience of the exercise, and discusses nuclear forensics analytical capability of the ISCN based on the review of the exercise.
Yokoyama, Akihiko*; Uesugi, Masaki*; Matsui, Yoshiki; Umino, Yuji*; Kimura, Yoshiki; Yamaguchi, Tomoki
no journal, ,
Collaboration of JAEA and Kanazawa University has verified the analysis accuracy for the establishment of nuclear forensics uranium dating method by alpha-ray spectrometry. In the chemical separation, uranium standards are used to quantify Th-230 produced. In this case, the target for the existence ratio with U-234 is about 1/10000. Therefore, a recovery correction with a tracer was performed and the results were compared with those obtained by a mass spectrometer. In addition, we examined technical issues that contribute to improving analysis accuracy and speeding up analysis time.
Matsui, Yoshiki; Kimura, Yoshiki; Ogawa, Jumpei; Umino, Yuji*; Matsumoto, Tetsuya*; Hosoi, Masaharu*; Shinohara, Nobuo
no journal, ,
no abstracts in English
Kimura, Yoshiki; Matsui, Yoshiki; Yamaguchi, Tomoki
no journal, ,