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Tsuchiya, Harufumi; Harada, Hideo; Koizumi, Mitsuo; Kitatani, Fumito; Kureta, Masatoshi; Becker, B.*; Kopecky, S.*; Heyse, J.*; Paradela, C.*; Mondelaers, W.*; et al.
Kaku Busshitsu Kanri Gakkai (INMM) Nihon Shibu Dai-36-Kai Nenji Taikai Rombunshu (Internet), 9 Pages, 2015/12
Neutron Resonance Densitometry (NRD) was developed as a non-destructive assay to quantify U and Pu isotopes in particle-like debris. NRD is composed of neutron resonance transmission analysis (NRTA) and Neutron Resonance Capture Analysis (NRCA) or Prompt Gamma-ray Analysis (PGA). NRCA/PGA in NRD plays a role of identifying impurities in debris under the high-radiation field primarily caused by 
Cs. For this purpose, a novel LaBr
-ray detector employing specific shields has been newly developed. With the developed -ray detector, a demonstration NRCA experiment was performed at a neutron time of flight facility GELINA (Belgium). As a result, samples (Hf, Gd, Ni) placed in a black box that is completely sealed by third party were successfully identified by the experiment. This presentation explains the design concept of the ray detector including its detection principle and details of the demonstration NRCA experiment.
Seya, Michio; Naoi, Yosuke; Kobayashi, Naoki; Nakamura, Takahisa; Hajima, Ryoichi; Soyama, Kazuhiko; Kureta, Masatoshi; Nakamura, Hironobu; Harada, Hideo
Kaku Busshitsu Kanri Gakkai (INMM) Nihon Shibu Dai-35-Kai Nenji Taikai Rombunshu (Internet), 9 Pages, 2015/01
The Integrated Support Center for Nuclear Non-proliferation and Nuclear Security (ISCN) of Japan Atomic Energy Agency (JAEA) has been conducting (based on collaborations with JAEA other centers) the following basic technology development programs of advanced non-destructive detection/measurement of nuclear material for nuclear security and nuclear non-proliferation. (1) The demonstration test of the Pu-NDA system for spent fuel assembly using PNAR and SINRD (JAEA/USDOE(LANL) collaboration, completed in JFY2013), (2) Basic development of NDA technologies using laser Compton scattered -rays (Demonstration of an intense mono-energetic -ray source), (3) Development of alternative to He-3 neutron detection technology, (4) Development of neutron resonance densitometry (JAEA/JRC collaboration)This paper introduces above programs.
Kitatani, Fumito; Koizumi, Mitsuo; Tsuchiya, Harufumi; Takamine, Jun; Kureta, Masatoshi; Harada, Hideo; Seya, Michio; Hori, Junichi*; Sano, Tadafumi*
no journal, ,
no abstracts in English
Kureta, Masatoshi; Koizumi, Mitsuo; Harada, Hideo; Seya, Michio; Naoi, Yosuke
no journal, ,
The JAEA will start the following new program with collaboration with EC/JRC. "(Tentative) Development of active neutron NDA techniques with DDA, DG, NRTA and PGA using a pulsed neutron source". The final purpose of this program is to establish the measurement techniques for the high radioactive Special Nuclear Material (SNM) such as the Spent Fuel (SF) in the repossessing process and for nuclear non-proliferation applications. In this program, the JAEA will conduct the R&D on active neutron non-destructive measurement techniques of nuclear material and study the combination.
Harada, Hideo; Koizumi, Mitsuo; Tsuchiya, Harufumi; Kitatani, Fumito; Seya, Michio; Becker, B.*; Heyse, J.*; Kopecky, S.*; Paradela, C.*; Schillebeeckx, P.*
no journal, ,
A new concept named as neutron resonance densitometry (NRD) has been proposed by JAEA to quantify the amounts of special nuclear materials included in samples with unknown elemental and isotopic composition, such as melted fuel debris generated in severe accidents of nuclear reactors such as Fukushima Daiichi. JAEA and JRC-IRMM has started the international collaboration on the feasibility study aiming at development of a quantifying technique of nuclear materials by a non-destructive method NRD. The highlights of the significant results such as detector development, validation measurements using a U sample and a heterogeneous sample, the advanced analysis method are presented together with the concept of the NRD.