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Itagaki, Masafumi*; Kurihara, Kenichi
Nihon Genshiryoku Gakkai-Shi, 44(12), p.873 - 878, 2002/12
An inverse problem has been known as a method to identify the cause on the basis of consequent observation and mathematical investigation. In recent years, the advancement of computer technology and numerical algorithms has stimulated this field of methodology. This leads to that an inverse problem is being noted as a new area of apllied physics and engineering. In this review, several inverse problems dealt in the nuclear engineering are presented together with the updated topics on this problem.
; ; Kawasaki, Hirotsugu; Aoto, Kazumi
JNC TY9400 2000-010, 138 Pages, 2000/03
JNC-TY9400-2000-010.pdf:5.15MB
None
Kurihara, Kenichi
Fusion Technology, 34(3), p.548 - 552, 1998/11
no abstracts in English
Kurihara, Kenichi
JAERI-Research 97-084, 21 Pages, 1997/11
JAERI-Research-97-084.pdf:1.36MB
no abstracts in English
Kishimoto, Maki; Sakasai, Kaoru; Ara, Katsuyuki; Fujita, Takaaki;
IEEE Transactions on Plasma Science, 24(2), p.528 - 538, 1996/04
Times Cited Count：1 Percentile：4.34(Physics, Fluids & Plasmas)no abstracts in English
Kishimoto, Maki; Sakasai, Kaoru; Ara, Katsuyuki
Journal of Applied Physics, 79(1), p.1 - 7, 1996/01
Times Cited Count：11 Percentile：48.27(Physics, Applied)no abstracts in English
Ara, Katsuyuki; ; ; Sakasai, Kaoru
Proceedings of 8th International Conference on Pressure Vessel Technology (ICPVT-8), 1, p.183 - 189, 1996/00
no abstracts in English
Ara, Katsuyuki; ;
Dai-4-Kai MAGDA-Konfarensu in Tottori Koen Rombunshu; Denji Gensho Oyobi Denjiryoku Ni Kansuru Konfarensu, 0, p.79 - 82, 1995/00
no abstracts in English
Sakasai, Kaoru; Ara, Katsuyuki
Nihon AEM Gakkai-Shi, 3(2,3), p.1 - 7, 1995/00
no abstracts in English
Ara, Katsuyuki; ; ; Sakasai, Kaoru
Proc. of the Japan-Central Europe Joint Workshop on Advanced Computing in Engineering, 0, p.221 - 226, 1994/00
no abstracts in English
Ara, Katsuyuki; ;
MAG-93-218, p.19 - 38, 1993/11
no abstracts in English
Kishimoto, Maki; Sakasai, Kaoru; Ara, Katsuyuki
MAG-93-167, p.17 - 34, 1993/09
no abstracts in English
Ara, Katsuyuki; Sakasai, Kaoru; Kishimoto, Maki
MAG-93-91, p.37 - 56, 1993/03
no abstracts in English
Kishimoto, Maki; Sakasai, Kaoru; Ara, Katsuyuki
MAG-92-235, p.83 - 96, 1992/11
no abstracts in English
Ara, Katsuyuki; Sakasai, Kaoru; Kishimoto, Maki
Nonlinear Phenomena in Electromagnetic Fields, p.193 - 196, 1992/00
no abstracts in English
Sakasai, Kaoru; Ara, Katsuyuki
MAG-91-159, p.43 - 54, 1991/08
no abstracts in English
Sakasai, Kaoru; Ara, Katsuyuki
MAG-90-177, p.103 - 112, 1990/11
no abstracts in English
Kaku, Eiji*; Okamoto, Koji*; Kondo, Masahiro*; Ozdemir, E.*; Shiba, Tomoki*; Sato, Ikken
no journal, ,
In this study aiming at contribution for safe decommissioning of Fukushima-Daiichi NPP, CFD (Computational Fluid Dynamics) method was applied and temperature distribution of Unit 3 was reproduced. This temperature distribution was then compared with the measured data obtained by TEPCO so that debris distribution can be estimated. Combined application of optimized tools and CFD method to resolve inverse problem determining best suited thermal balance within the containment vessel is a characteristic of this study.
Sasaki, Miyuki; Abe, Yuki*; Sanada, Yukihisa; Torii, Tatsuo*
no journal, ,
This presentation describes the development of a compact and lightweight radiation measurement system called FRIE (Fractal Radiation Imaging Element), capable of estimating radiation distribution. The FRIE system features a detector array structured in a fractal shape modeled after the Sierpinski tetrahedron, which enables the determination of the direction of incident radiation using individual sensor data. Additionally, the FRIE system utilizes radiation measurement data combined with three-dimensional point cloud data of the measurement space to perform inverse problem analysis to estimate the distribution of radioactivity within the measurement environment. The estimated resolution of radioactivity distribution ranges from about 10 to 30 degrees, which has been proven to provide high estimation accuracy through both simulations and actual measurement data. The current FRIE system is designed to be wearable, allowing measurements while walking, whether carried by humans or robots. It includes a depth camera for self-positioning capabilities, making it possible to perform measurements in environments where no GPS data is available, such as indoors or in forested areas. Future optimization of the FRIE system for specific measurement environments is expected to enhance the efficiency and accuracy of radiation distribution mapping.
