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Naoi, Yosuke; Oda, Tetsuzo; Tomikawa, Hirofumi
Nihon Genshiryoku Gakkai-Shi ATOMO
, 58(9), p.536 - 541, 2016/09
Japan has been promoting nuclear energy research and development, and the use of nuclear energy for only peaceful purposes in accordance with Atomic Energy Basic Acts enacted in 1955. In order to ensure limited to their peaceful utilization, it has been performing a nuclear material accountancy and reporting it based on bilateral nuclear agreement (Japan and the United States, Japan and France, Japan and Canada and so on) before concluding the comprehensive safeguards agreement with the IAEA. After the conclusion of that in 1977, the Japanese national law had been revised. The nuclear material accountancy and its reports to the IAEA have been implemented based on the revised law. In 1999, Japan ratified the additional protocol. Then it has been responding a new obligation in the additional protocol. The correctness and completeness of the declaration of nuclear activities in Japan have been verified by the IAEA, and then the "broader conclusion" was given to Japan in 2004. There indicates no diversion or undeclared nuclear activities in Japan. Since then Japan has been obtaining the "broader conclusion" every year. In this report we will report the JAEA's contribution to the IAEA safeguards on technical research and development and human resource development.
Seya, Michio; Kureta, Masatoshi; Soyama, Kazuhiko; Nakamura, Hironobu; Harada, Hideo; Hajima, Ryoichi
Proceedings of INMM 55th Annual Meeting (Internet), 10 Pages, 2014/07
JAEA has been implementing development programs of basic technologies of the following advanced NDA (non-destructive assay) of nuclear material (NM) for nuclear safeguards and security. (1) Alternative to 
He neutron detection using ZnS/B
O
ceramic scintillator, (2) NRD (neutron resonance densitometry) using NRTA (neutron resonance transmission analysis) and NRCA (neutron resonance capture analysis), (3) NRF (nuclear resonance fluorescence)-NDA using laser Compton scattered (LCS) 
-rays (intense mono-energetic -rays). The development program (1) is for NDA systems that use ZnS/BO ceramic scintillator as alternative neutron detector to He for coming shortage of its supply. The program (2) is for a NDA system of isotopic composition measurement (non-destructive mass spectroscopy) in targets such as particle-like melted fuel debris using NRTA and NRCA. The program (3) is for NDA systems using a specific NRF reaction of certain Pu/U isotope caused by mono-energetic LCS -ray with energy tuned to the specific excited state of the isotope. This paper introduces above three programs.
Tanzawa, Sadamitsu; Ishijima, Kiyomi
JAERI-M 91-183, 31 Pages, 1991/11
no abstracts in English
*; ;
JAERI-M 82-141, 74 Pages, 1982/10
no abstracts in English
*; ;
JAERI-M 9840, 52 Pages, 1981/12
no abstracts in English
; ; ; *
Nihon Genshiryoku Gakkai-Shi, 19(7), p.473 - 480, 1977/07
Times Cited Count：0no abstracts in English
; ; Tasaka, Kanji
JAERI 1188, 20 Pages, 1970/07
no abstracts in English
Hajima, Ryoichi; Seya, Michio
no journal, ,
The QST and the JAEA are proposing an ERL (energy recovery linac) -based Compton source to produce high flux photons (1013 ph/s) in MeV region with energy tenability for non-destructive assay (NDA) of all nuclides (including nuclear materials (NM)) utilizing nuclear resonant fluorescence (NRF). We can apply the proposed NDA system to nuclear security and nuclear safeguards for analyzing NM in severe conditions such as under very high radiation background or in deep inside material. For these applications we have studied NDA of isotopes in transmission geometry for measurement of NM inside a thick wall canister and in scattering geometry for measurement of NMs of spent fuel in water or detection of NM in a heavy shield. We present our efforts on these.
