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Report No.
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Demonstration plan of Pu NDA system using ZnS ceramic scintillator

Nakamura, Hironobu ; Kureta, Masatoshi   ; Ozu, Akira  ; Soyama, Kazuhiko  ; Nakamura, Tatsuya  ; Mukai, Yasunobu ; Seya, Michio

To establish an alternative technique of $$^{3}$$He neutron detector as a safeguards application, we have started an R&D project to develop a new type of neutron detector (Pu NDA) using ZnS ceramic scintillator with support of Japanese government. The detector design is basically referenced from PCDF-PCAS (Plutonium Canister Assay System) which has total 22 $$^{3}$$He tubes and is used for a MOX canister measurement. In order to prove the technology and performance after the fabrication, we are planning to conduct 2 stage of demonstration activity. The first stage of demonstration implements the confirmation of flatness response profile for vertical axis, determination of detector parameters and basic performance comparison using Cf source and MOX powder around June 2013. After some modification will have completed, the second stage of demonstration activity will be conducted around December 2013. During the activity, we plan to perform the performance comparison between current PCAS and the new Pu NDA regarding Pu mass and counting statistics. It is expected that the new Pu NDA proves good performance for establishment of alternative technology instead of $$^{3}$$He neutron detector.

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