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Omer, M.; Hajima, Ryoichi*; Angell, C.*; Shizuma, Toshiyuki*; Hayakawa, Takehito*; Seya, Michio; Koizumi, Mitsuo
Proceedings of INMM 57th Annual Meeting (Internet), 9 Pages, 2016/07
Isotope-specific -rays emitted in the nuclear resonance fluorescence (NRF) process provide a good technique for a non-destructive detection and assay of nuclear materials. We are developing technologies relevant to
-ray nondestructive detection and assay utilizing NRF. A Monte Carlo code to simulate NRF process is necessary for design and evaluation of NDA systems. We are developing NRFGeant4, a Geant4-based simulation code, for this purpose. In NRF experiments, highly-enriched targets are generally used such that the NRF signals are dominant and easily measured. In contrast, a real situation may involve very small contents of isotopes of interest. This results in a difficulty in measuring NRF signals because of the interference with other interactions, e.g. elastic scattering. For example, a typical nuclear fuel pellet contains about 90% of
U as a host material and less than 1% of
Pu as an isotope of interest. When measuring NRF of
Pu, there would be a huge background coming from the elastic scattering of
U. Therefore, an estimation of the elastic scattering with the host material is essential for precise determination of isotope of interest. Satisfying estimation of elastic scattering is currently not available except for some calculations. In the present study, we upgrade our simulation code to include the calculation of elastic scattering events.
Angell, C.
Nuclear Instruments and Methods in Physics Research B, 368, p.9 - 14, 2016/02
Times Cited Count:1 Percentile:14.27(Instruments & Instrumentation)Angell, C.
Journal of Nuclear Science and Technology, 52(9), P. 1205, 2015/09
Hajima, Ryoichi; Sawamura, Masaru; Nagai, Ryoji; Nishimori, Nobuyuki; Hayakawa, Takehito; Shizuma, Toshiyuki; Angell, C.
Proceedings of 12th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.79 - 83, 2015/09
Generation of energy-tunable narrow-bandwidth -rays via Laser Compton Scattering (LCS) is of great interest for scientific studies and applications of MeV photons which interact with nuclei. We are developing technologies relevant to generation of high-brightness LCS
-ray beams. One of the promising applications of such
-rays is the nondestructive detection and assay of nuclides which are necessary for nuclear security and safeguards. We summarize R-and-D status of LCS
-ray sources and overview future applications.
Shizuma, Toshiyuki; Hajima, Ryoichi; Hayakawa, Takehito; Angell, C.; Seya, Michio
Proceedings of 37th ESARDA Annual Meeting (Internet), p.838 - 845, 2015/08
Nondestructive assay (NDA) of nuclear materials is an important technology for nuclear security and safeguard applications. We have proposed an NDA system based on nuclear resonance fluorescence (NRF). In the proposed detection system, an energy-tunable and mono-energetic -ray source generated by Compton scattering of laser light (laser Compton scattering; LCS) with high-energy electrons is used. The NRF measurement can be more efficient by using a mono-energetic
-ray beam, which has been demonstrated in recent NRF measurements. We have started a research and development program of the LCS
-ray NDA systems, which includes demonstration of LCS
-ray generation from an energy recovery linac (ERL), establishment of detection system, and benchmark of Monte Carlo simulation. The R&D status including recent results on the demonstrations of the LCS photon generation as well as the measurement principles will be reported.
Angell, C.; Hayakawa, Takehito; Shizuma, Toshiyuki; Hajima, Ryoichi; Quiter, B. J.*; Ludewigt, B. L.*; Karwowski, H. J.*; Rich, G.*; Silano, J.*
Proceedings of INMM 56th Annual Meeting (Internet), 9 Pages, 2015/07
Matsuba, Shunya*; Hayakawa, Takehito; Shizuma, Toshiyuki; Nishimori, Nobuyuki; Nagai, Ryoji; Sawamura, Masaru; Angell, C.; Fujiwara, Mamoru; Hajima, Ryoichi
Japanese Journal of Applied Physics, 54(5), p.052203_1 - 052203_5, 2015/05
Times Cited Count:3 Percentile:17.22(Physics, Applied)Angell, C.; Pedretti, M.*; Norman, E. B.*
Applied Radiation and Isotopes, 98, p.34 - 39, 2015/04
Times Cited Count:1 Percentile:12.03(Chemistry, Inorganic & Nuclear)Angell, C.
Journal of Nuclear Science and Technology, 52(3), p.426 - 433, 2015/03
Times Cited Count:4 Percentile:40.75(Nuclear Science & Technology)Angell, C.; Hajima, Ryoichi; Hayakawa, Takehito; Shizuma, Toshiyuki; Karwowski, H.*; Silano, J.*
Nuclear Instruments and Methods in Physics Research B, 347, p.11 - 19, 2015/03
Times Cited Count:8 Percentile:65.81(Instruments & Instrumentation)Angell, C.; Hammond, S. L.*; Karwowski, H. J.*; Kelley, J. H.*; Krtika, M.*; Kwan, E.*; Makinaga, Ayano*; Rusev, G.*
Physical Review C, 91(3), p.039901_1 - 039901_2, 2015/03
Times Cited Count:5 Percentile:78.67(Physics, Nuclear)Hajima, Ryoichi; Shizuma, Toshiyuki; Nagai, Ryoji; Mori, Michiaki; Hayakawa, Takehito; Angell, C.; Seya, Michio
Kaku Busshitsu Kanri Gakkai (INMM) Nihon Shibu Dai-35-Kai Nenji Taikai Rombunshu (Internet), 7 Pages, 2015/01
no abstracts in English
Angell, C.; Hayakawa, Takehito; Shizuma, Toshiyuki; Hajima, Ryoichi; Quiter, B. J.*; Ludewigt, B. L.*; Karwowski, H.*; Rich, G.*
Nuclear Physics and -ray sources for Nuclear Security and Nonproliferation, p.133 - 141, 2014/12
Angell, C.; Hajima, Ryoichi; Hayakawa, Takehito; Shizuma, Toshiyuki; Karwowski, H.*; Silano, J.*
Physical Review C, 90(5), p.054315_1 - 054315_6, 2014/11
Times Cited Count:5 Percentile:42.25(Physics, Nuclear)Angell, C.; Kaplan, A.*; Seelig, J. D.*; Norman, E. B.*; Pedretti, M.*
American Journal of Physics, 82(8), P. 802, 2014/08
Times Cited Count:0 Percentile:2.17(Education, Scientific Disciplines)Angell, C.
Nuclear Instruments and Methods in Physics Research A, 752, p.33 - 35, 2014/07
Times Cited Count:3 Percentile:30.04(Instruments & Instrumentation)Hajima, Ryoichi; Hayakawa, Takehito; Shizuma, Toshiyuki; Angell, C.; Nagai, Ryoji; Nishimori, Nobuyuki; Sawamura, Masaru; Matsuba, Shunya; Kosuge, Atsushi*; Mori, Michiaki; et al.
European Physical Journal; Special Topics, 223(6), p.1229 - 1236, 2014/05
Times Cited Count:12 Percentile:44.09(Physics, Multidisciplinary)Shizuma, Toshiyuki; Hayakawa, Takehito; Angell, C.; Hajima, Ryoichi; Minato, Futoshi; Suyama, Kenya; Seya, Michio; Johnson, M.*; McNabb, D.*
Nuclear Instruments and Methods in Physics Research A, 737, p.170 - 175, 2014/02
Times Cited Count:1 Percentile:11.75(Instruments & Instrumentation)We estimated statistical uncertainties of a nondestructive assay system using nuclear resonance fluorescence (NRF) for spent nuclear fuel including low-concentrations of actinide nuclei with an intense, mono-energetic photon beam. Background counts from radioactive materials inside the spent fuel were calculated with the ORIGEN2.2-UPJ burn-up computer code. Coherent scattering contribution associated with Rayleigh, nuclear Thomson, and Delbrck scattering was also considered. Assuming that the total NRF cross sections are in the range of 3 to 100 eV
b at excitation energies of 2.25, 3.5, and 5 MeV, statistical uncertainties of the NRF measurement were estimated. We concluded that it is possible to assay 1% actinide content in the spent fuel with 2.2 to 3.2% statistical precision during 4000 second measurement time for the total integrated cross section of 30 eV
b at excitation energies of 3.5 to 5 MeV.
Seya, Michio; Harada, Hideo; Kitatani, Fumito; Koizumi, Mitsuo; Tsuchiya, Harufumi; Iimura, Hideki; Kureta, Masatoshi; Takamine, Jun; Hajima, Ryoichi; Hayakawa, Takehito; et al.
Kaku Busshitsu Kanri Gakkai (INMM) Nihon Shibu Dai-34-Kai Nenji Taikai Rombunshu (Internet), 10 Pages, 2013/10
The forming of MF in severe accidents of nuclear reactors such as Units 1 - 3 of Fukushima-Daiichi NPP (Nuclear Power Plant) inevitably change the category of the nuclear reactor from "item facility" to "bulk-handling facility". At removal of the MF it is necessary to break chunks of MF into relatively small blocks by using some tools, resulting in debris that consists of cut or small rock-like debris and particle (or grain)-like debris in bulk form. This paper presents a categorization of debris of MF and two possible non-destructive assay (NDA) technologies for precise measurement which could be applied to the NM accountancy of MF debris. One of them is Neutron Resonance Densitometry (NRD) for particle-like (or grain-like) debris, and another is NRF (Nuclear Resonance Fluorescence) NDA using LCS (Laser Compton Scattered) -rays (mono-energetic
-rays) for cut or small rock-like debris. The paper also describes about the recent development of these two technologies.
Shizuma, Toshiyuki; Hayakawa, Takehito; Angell, C.; Hajima, Ryoichi; Minato, Futoshi; Suyama, Kenya; Seya, Michio
JAEA-Conf 2013-001, p.139 - 141, 2013/09
Nondestructive assay (NDA) of nuclear materials in spent fuel is a crucial technology in nuclear security and safeguards perspectives. A technique based on nuclear resonance fluorescence (NRF) with a mono-energetic source is one that has been proposed as such NDA systems. By calculating the background
rays from spent fuel, the statistical precision of the proposed NRF-based NDA system was evaluated.