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Report No.
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Development of active neutron NDA system for nuclear security

Toh, Yosuke  

Joint Research Centre (JRC) - Japan Atomic Energy Agency (JAEA) collaboration AS-7 started in 2015 to develop an active neutron NDA system for nuclear non-proliferation and nuclear security. The collaboration aims at contributing to the establishment of an innovative non-destructive analysis (NDA) system for the quantification of SNM and MA in high radioactive nuclear materials. Several active neutron NDA techniques, namely Differential Die-Away Analysis (DDA), Prompt Gamma-ray Analysis (PGA), Neutron Resonance Capture Analysis (NRCA), Neutron Resonance Transmission Analysis (NRTA) and Delayed Gamma-ray Analysis (DGA) have been developed in the collaboration. In the first phase of the project, we developed a combined NDA system, which enables the simultaneous measurements of DDA and PGA. The project now enters the second phase. The second phase focuses on the development of the active neutron NDA system for high-level radioactive materials. In the second phase, we will continue to conduct additional research to improve the methodology and develop an integrated NDA system which consists of not only DDA and PGA, but also NRTA. In this presentation, we will provide an overview of the second phase and report the recent results in the first phase. This research was implemented under the subsidiary for nuclear security promotion of MEXT.

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