Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Paradela, C.*; Alaerts, G.*; Becker, B.*; Harada, Hideo; Heyse, J.*; Kitatani, Fumito; Koizumi, Mitsuo; Kopecky, S.*; Mondelaers, W.*; Moens, A.*; et al.
EUR-27507-EN, 16 Pages, 2015/04
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.
Tsuchiya, Harufumi; Harada, Hideo; Koizumi, Mitsuo; Kitatani, Fumito; Kureta, Masatoshi; Takamine, Jun; Iimura, Hideki; Kimura, Atsushi; Becker, B.*; Heyse, J.*; et al.
no journal, ,
Neutron Resonance Densitometry (NRD) is a non-destructive method using a pulsed neutron beam in order to quantify nuclear materials in particle-like debris of melted fuel that is generated by a severe accident like the one at the Fukushima Daiichi Nuclear Power Plant. It is a combination of neutron resonance transmission analysis (NRTA) and neutron resonance captures analysis (NRCA) or Prompt Gamma-ray Analysis (PGA). NRCA/PGA in NRD, using a newly designed 
-ray detector, plays a role of measuring impurities in debris that would have high radioactivity derived from 
Cs. Especially, the -ray detector was specially designed to measure 478-keV rays radiated by 
B under the presence of Cs. Then utilizing information on the amount of impurities obtained by NRCA/PGA, NRTA quantifies special nuclear materials in debris. To verify the effectiveness of NRD for quantifying nuclear materials, NRTA and NRCA/PGA experiments were conducted at GELINA, IRMM, by an international collaboration of JAEA and EC/JRC/IRMM. In addition, achievable accuracy concerning NRD was studied by Monte Carlo simulations. In this contribution, these achievements on NRD as well as its concept are reviewed.
-rays under strong backgroundKoizumi, Mitsuo; Tsuchiya, Harufumi; Kitatani, Fumito; Harada, Hideo; Takamine, Jun; Kureta, Masatoshi; Iimura, Hideki; Kimura, Atsushi; Seya, Michio; Paradela, C.*; et al.
no journal, ,
no abstracts in English
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.
