Development of nuclear forensics capabilities in Japan; New age-dating method

Okubo, Ayako; Shinohara, Nobuo; Umino, Yuji; Hara, Mikiya

no journal, , 

Joint Sample Analysis Project on UOC with USA and Kazakhstan; Overview of project and validation of analytical methods on uranium isotope ratio

Matsui, Yoshiki; Kimura, Yoshiki; Ogawa, Jumpei; Umino, Yuji*; Matsumoto, Tetsuya*; Hosoi, Masaharu*; Shinohara, Nobuo

no journal, , 

no abstracts in English

Current status and future prospects on nuclear forensics capability building and technology development by the Integrated Support Center for Nuclear Non-proliferation and Nuclear Security at the Japan Atomic Energy Agency

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.

The Evaluation of nuclear forensics analytical capability in the 7th Collaborative Materials Exercise of the Nuclear Forensics (CMX-7)

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.

Validation and advancement of uranium dating method by alpha spectrometry for nuclear forensics

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.