Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Shinohara, Nobuo; Asano, Yoshie; Hirota, Naoki*; Hokida, Takanori; Inoue, Yoji; Kumata, Masahiro; Nakahara, Yoshinori*; Oda, Tetsuzo*; Uchikoshi, Takako*; Yamamoto, Yoichi
Proceedings of International Conference on Nuclear Energy System for Future Generation and Global Sustainability (GLOBAL 2005) (CD-ROM), 3 Pages, 2005/10
Research activities of JAERI related to the CTBT verification regime are presented in the International Conference. The subjects of this presentation are (1) an overview of the CTBT verification regime, (2) construction and operation of the radionuclide monitoring stations of Okinawa (RN37) and Takasaki (RN38) and the certified radionuclide laboratory (RL11), and (3) preparation of the National Data Center at Tokai (JAERI NDC) for radionuclide data. The RN38 station has been certified by the CTBTO/PrepCom and sending the measured data every day. The infrastructures and operational manuals for RN37 and RL11 are now preparing for their operations. The JAERI NDC has experimentally analyzed and evaluated the radionuclide data from all over the world through International Data Center (IDC). As an example of the JAERI NDC works, atmospheric dispersion backtracking system has been developing by using WSPEEDI (Worldwide Version of System for Prediction of Environmental Emergency Dose Information) code to estimate a source location of radionuclide release by nuclear explosion/accident.
Hirota, Naoki*; Hokida, Takanori; Inoue, Yoji; Kumata, Masahiro; Kurosawa, Yoshiaki; Miyamoto, Yutaka; Nakahara, Yoshinori; Oda, Tetsuzo; Shinohara, Nobuo; Uchikoshi, Takako*; et al.
JAERI-Review 2003-021, 68 Pages, 2003/08
JAERI-Review-2003-021.pdf:9.73MB
This report describes research activities of the R & D Group for Non-Proliferation Technology related to the Comprehensive Nuclear-Test-Ban Treaty (CTBT) verification regime. The main subjects of this report are (1) an overview of the CTBT verification regime, (2) preparation of the National Data Center for radionuclide data, (3) construction and operation of the radionuclide monitoring stations at Takasaki and Okinawa and the certified rarionuclide laboratory at Tokai in Japan. We have participated in an intercomparison test internationally organized for the certified laboratories and the test results are given here. Scientific application of the CTBT-related technologies to environmental researches is also depicted.
Yamamoto, Yoichi; Hokida, Takanori; Hirota, Naoki*; Oda, Tetsuzo; Nakahara, Yoshinori; Kumata, Masahiro; Inoue, Yoji; Uchikoshi, Takako*; Shinohara, Nobuo; Usuda, Shigekazu
Dai-23-Kai Kaku Busshitsu Kanri Gakkai Nihon Shibu Nenji Taikai Rombunshu, p.53 - 60, 2002/12
The Japan Atomic Energy Research Institute (JAERI) has developed the National Data Center (NDC) for radionuclide as part of the international monitoring regime related to the Comprehensive Nuclear-Test-Ban Treaty (CTBT). JAERI NDC already started to input gamma-ray spectrum data obtained from several International Monitoring System (IMS) stations into a database. Data analysis reports made by the International Data Center (IDC) are also stored in the database. Some software tools are under development for the NDC's independent analysis such as investigation of existence of the radionuclides derived from nuclear explosion and presumptive analysis of source location of radionuclide release. The NDC system will also be able to post IMS data and analysis results to the authorized users on the Internet. This paper presents the role, current state of system development and future plan of JAERI NDC.
Oda, Tetsuzo; Kumata, Masahiro; Nakahara, Yoshinori; Yamamoto, Yoichi; Hokida, Takanori; Hirota, Naoki*; Uchikoshi, Takako*; Inoue, Yoji; Shinohara, Nobuo
Dai-23-Kai Kaku Busshitsu Kanri Gakkai Nihon Shibu Nenji Taikai Rombunshu, p.29 - 37, 2002/12
The Comprehensive nuclear Test-Ban Treaty(CTBT) bans all nuclear explosions and also calls for a verification regime, which consists of the International Monitoring System(IMS) and On-site Inspection. The primary objectives of the IMS are to deter nuclear explosions in all environments and, if such an explosion does occur, to detect, locate, and identify its source. The CTBT was opened for signature on September 24, 1996 and the Preparatory Commission(PrepCom) for the CTBT Organization was established to prepare for the verification regime in order to monitor compliance with the Treaty. The Preparatory Commission comprises two main organs: a plenary body of all the States Signatories as the highest policy-making organ, and the Provisional Technical Secretariat(PTS). The plenary body has three subsidiary bodies: Working Group A(administrative matters and legal issues), Working Group B(verification issues), and an Advisory Group. This paper presents an overview and mandate of the PrepCom, and status of verification regime, and discusses future activities.
-NaCl and NdCl-KCl system by 
ray attenuationSato, Tadashi; Okamoto, Yoshihiro; Ogawa, Toru
Journal of Nuclear Science and Technology, 39(Suppl.3), p.635 - 637, 2002/11
Densities of molten chlorides mixtures of NdCl-NaCl and NdCl-KCl systems have been measured using -ray attenuation method as a function of temperature. Gamma ray spectra of Ho-166m radiation source were taken before and after passing through the molten chlorides in a quartz cell by a Ge-detector coupled with muluti-channel analyzer. The density was calculated with observed attenuation factor, cross section data of photons for relevant elements and length of the cell. The measured densities of molten NdCl-NaCl and NdCl-KCl were compared with literature data by dilatometric method.
Hokida, Takanori; Yamamoto, Yoichi; Yamazawa, Hiromi
Dai-22-Kai Kaku Busshitsu Kanri Gakkai Nihon Shibu Nenji Taikai Rombunshu, p.149 - 156, 2001/02
no abstracts in English
Suyama, Kenya; Kiyosumi, Takehide*; Mochizuki, Hiroki*
JAERI-Data/Code 2000-027, 88 Pages, 2000/07
JAERI-Data-Code-2000-027.pdf:4.08MB
no abstracts in English
Hokida, Takanori; Oda, Tetsuzo; Yamamoto, Yoichi; Miyamoto, Yutaka; Adachi, Takeo
Dai-21-Kai Kaku Busshitsu kanri Gakkai (INMM) Nihon Shibu Nenji Taikai Rombunshu, p.17 - 24, 2000/00
no abstracts in English
Takano, Makoto; Oda, Tetsuzo; Nishimura, Hideo; Adachi, Takeo
Kaku Busshitsu Kanri Gakkai Nihon Shibu Dai-20-Kai Kinen Taikai Rombunshu, p.100 - 105, 1999/11
no abstracts in English
Suyama, Kenya; *; *
JAERI-Data/Code 97-047, 128 Pages, 1997/11
JAERI-Data-Code-97-047.pdf:3.06MB
no abstracts in English
Hasegawa, Akira
Nihon Genshiryoku Gakkai-Shi, 39(11), p.957 - 959, 1997/00
no abstracts in English
Tasaka, Kanji; Katakura, Junichi; Ihara, Hitoshi; Yoshida, Tadashi*; Iijima, Shungo*; Nakashima, Ryuzo*; Nakagawa, Tsuneo; Takano, Hideki
JAERI 1320, 253 Pages, 1990/09
no abstracts in English
; *; ; ; *
JAERI-M 84-182, 107 Pages, 1984/10
no abstracts in English
; ; Nakazawa, Masaharu*; *; *; ; ;
JAERI-M 84-010, 426 Pages, 1984/03
no abstracts in English
Umezawa, Hirokazu; *
JAERI-M 9993, 84 Pages, 1982/02
no abstracts in English
Kikuchi, Yasuyuki; ; Tasaka, Kanji; ; *; Katsuragi, Satoru
JAERI-M 6001, 80 Pages, 1975/02
no abstracts in English
Fuketa, Toyojiro
JAERI-M 5984, 304 Pages, 1975/02
no abstracts in English
Nihon Genshiryoku Gakkai-Shi, 14(10), p.568 - 569, 1972/00
no abstracts in English
Nihon Genshiryoku Gakkai-Shi, 13(7), p.413 - 415, 1971/00
no abstracts in English
Yamamoto, Yoichi; Kijima, Yuichi; Tomita, Yutaka
no journal, ,
As a member of the CTBT National Operation System of Japan (NOSJ), JAEA monitors and evaluates radionuclides derived from nuclear tests. For this purpose, Takasaki and Okinawa radionuclide stations, Tokai radionuclide laboratory, and a national data center already were put in place and have been operated. This presentation introduces outline of NOSJ and each facility, the response to a nuclear test event, JAEA's recent activities etc.
Tomita, Yutaka; Furuno, Akiko; Yamamoto, Yoichi; Kurihara, Toshiyuki
no journal, ,
We are operating the National Data Center (NDC-2) in Japan Atomic Energy Agency (JAEA), and we receive and analyze data from radionuclide stations of Comprehensive Nuclear-Test-Ban Treaty (CTBT) located around the world. These data can be used not only to detect nuclear tests, but also to confirm of the presence of the accidental release of radionuclides from the nuclear facilities. We introduce in this presentation about our results of radionuclide and atmospheric dispersion analyses for a case in which CTBT monitored anthropogenic radionuclides were detected at the Stockholm station (RN63) in Sweden in June 2020. We have also analyzed data from a radionuclide station located downwind from the Zaporizhzhia NPP since its shelling in March 2022 following the Ukrainian conflict. These results will also be shown in the presentation.
