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Rossi, F.; 小泉 光生; Lee, H.-J.; Rodriguez, D.; 高橋 時音; Abbas, K.*; Bogucarska, T.*; Crochemore, J.-M.*; Pedersen, B.*; Varasano, G.*
61st Annual Meeting of the Institute of Nuclear Materials Management (INMM 2020), Vol.2, p.907 - 911, 2021/00
Delayed Gamma-ray Spectroscopy (DGS) is a nondestructive assay technique with the capability to quantify the fissile composition of small nuclear material samples from reprocessing plants. In recent years, the Japan Atomic Energy Agency in collaboration with the Joint Research Centre performed several experiments using uranium and plutonium standard samples. In this paper, we present some of our recent experiment results showing the feasibility of DGS for fissile mass estimation. In particular, we interrogate uranium samples of different enrichment and we are showing that we were able to qualify significant peaks even for a depleted uranium sample above 2.7 MeV. Applying correction factors for neutron self-shielding and gamma self-absorption, we obtained a mass linear correlation when considering total integrated counts above 3.3 MeV as well as specific individual peak counts. This work is supported by the Japanese Ministry of Education, Culture, Sports, Science, and Technology (MEXT) under the subsidy for the "promotion for strengthening nuclear security and the like". This work was done under the agreement between JAEA and EURATOM in the field of nuclear material safeguards research and development.
直井 洋介; 堀 雅人; 野呂 尚子
Proceedings of INMM 61st Annual Meeting (Internet), 9 Pages, 2020/07
アジア地域の核不拡散・核セキュリティに係る人材育成支援COEとして、2010年の設立からこれまでの9年間の活動における良好事例について報告する。
堀 雅人; 直井 洋介
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ISCNは、2010年10月に設立してから、今年10周年を迎える。ISCNは、核不拡散, 核セキュリティ, 非核化の分野で、IAEA, CTBTO, DOE/NNSA, EC-JRCやその他の組織と協力しつつ、活動を実施してきた。本発表は、過去10年間の活動をまとめたものである。IAEAは、今後10年、引き続き、これらの組織と密接に協力しつつ、国内および国際的な核不拡散及び核セキュリティの強化、非核化の支援の取組みに貢献する予定である。