Visualization and measurement of multiphase flow by neutron radiography

Kureta, Masatoshi

Kagaku Kogaku, 80(8), p.464 - 467, 2016/08

A neutron radiography is technology which carries out visualization and measurement of the inside of a substance using neutrons. This technology has the complementary feature comparing with X-ray radiography (Roentgen technique). In this review paper, the measurement principle, some application examples such as visualization of oil in the working car engine, and about the leading-edge technology using high-intensity proton beam accelerator facility J-PARC (common neutron imaging facility), etc. It was introduced in the form where the whole neutron radiography technology for every dimension of measurement were covered.

Visualization and measurement of the inside mortaring car engine

Kureta, Masatoshi

Hamon, 24(特別号), 2 Pages, 2014/11

The fundamentals and applications on the neutron imaging technique, volume visualization and 3D measurement by the neutron 3D-CT technique and the most advanced imaging technique by using pulsed neutrons were reviewed in this paper. Visualization and measurement of the inside mortaring car engine is one of the industrial applications on the neutron imaging technique. This technique was also applied for visualization and measurement of the multiphase plow applications. The 3D visualization technique has been used for the concrete research etc. The pulsed neutron imaging techniques developed for J-PARC have made possible element-selective imaging and metallographic structure imaging which were impossible by the traditional techniques. Newly providing pulsed neutron imaging facilities for common use is also introduced briefly.

Activity for promotion of industrial applications of neutrons in Ibaraki prefecture, Study group for nondestructive analysis and imaging

Matsubayashi, Masahito; Yasuda, Ryo; Tanji, Akira; Miyata, Satoru; Matsue, Hideaki; Nakanishi, Tomoko

Dai-5-Kai Hoshasen Ni Yoru Hihakai Hyoka Shimpojiumu Koen Rombunshu, p.35 - 36, 2005/02

no abstracts in English

Visualization of boiling two-phase flow in a tight-lattice 14-rod bandle

Kureta, Masatoshi

Kashika Joho Gakkai-Shi, 24(Suppl.1), p.265 - 268, 2004/07

http://doi.org/10.3154/jvs.24.Supplement1_265

Visualization of 3D and instantaneous void fraction distribution of boiling flow in a tight-lattice 14-rod bundle is conducted by using neutron tomography and high-frame- rate neutron radiography void fraction measurement techniques. The purpose of the experiment is to understand vapor bubbles/water behavior ranging from the onset of boiling to the high void fraction region based on ("3D" + "2D+Time") void fraction data, and to obtain the fine-mesh database for verification of advanced analysis codes. Following phenomena are made clear from the present experiment: Vapor accumulates in the channel center; High void fraction spots appear between adjacent heater rods, that is, in narrow space at the inlet; Void fraction in the triangular space among three rods becomes high by void drift phenomenon, and "vapor chimney" is formed; Flow is intermittent, and vapor bubble clusters are formed periodically; Onset points of net vapor generation are scattered not only in the center but in the peripheral.

Visualization and measurement of boiling flow using neutron beam

Kureta, Masatoshi; Hoshi, Yoshiyuki; Yamada, Kazuyuki*; Sakamoto, Kiyotaka*

Nikkei Saiensu, 111 Pages, 2004/01

no abstracts in English

Measurement and observation technique of boiling flow in the metallic flow channel using neutron beam

Kureta, Masatoshi

Genshiryoku eye, 49(4), p.34 - 37, 2003/04

http://ci.nii.ac.jp/naid/80015783380

no abstracts in English

Study on point of net vapor generation by neutron radiography in subcooled boiling flow along narrow rectangular channels with short heated length

Kureta, Masatoshi; Hibiki, Takashi*; Mishima, Kaichiro*; Akimoto, Hajime

International Journal of Heat and Mass Transfer, 46(7), p.1171 - 1181, 2003/03

https://doi.org/10.1016/S0017-9310(02)00398-8

no abstracts in English

Hydrogen analyses of titanium hydride by ERD and NRG methods

Tsuchiya, Bun*; Teshigawara, Makoto; Nagata, Shinji*; Konashi, Kenji*; Yasuda, Ryo; Nishino, Yasuharu; Nakagawa, Tetsuya*; Yamawaki, Michio*

Nuclear Instruments and Methods in Physics Research B, 190(1-4), p.699 - 703, 2002/05

https://doi.org/10.1016/S0168-583X(01)01238-1

Practicability of Elastic Recoil Detection (ERD) and Neutron Radiography (NRG) methods for hydrogen concentration in titanium hydrides (d-TiHx : 1.6<x<2.0) is investigated. In ERD methods, the hydrogen concentration in the surface of TiHx is recognized. In NRG method, the hydrogen concentration over the balk was confirmed. These results show that both methods are effective means for estimating the hydrogen concentration in hydride materials.

Development of advanced neutron radiography for inspection on irradiated fuels and materials, 3; Examination of neutron imaging plate and computed tomography methods on unirradiated fuel rod

Yasuda, Ryo; Matsubayashi, Masahito; Nakata, Masahito; Harada, Katsuya; Amano, Hidetoshi; Ando, Hitoshi*; Sasajima, Fumio; Nishi, Masahiro; Horiguchi, Yoji

JAERI-Tech 2002-001, 23 Pages, 2002/02

JAERI-Tech-2002-001.pdf:3.79MB

Advanced neutron radiography techniques such as neutron imaging plate (NIP) and Computed Tomography (CT) methods have been investigated the practicality for Post Irradiation Examination (PIE). In this work, an unirradiated fuel rod was examined by NIP and CT methods in order to collect the fundamental data for applying these techniques to PIE.The fuel rod is composed of seven-enriched UO2 pellet and two-natural UO2 pellet that are loaded into a Zircaloy tube. There are somewhat difference in the size and shape among those UO2 pellets. A transmitted and cross-sectional images were obtained by NIP and CT methods, respectively.In the NIP image, the difference in the size, shape, and enrichment among the UO2 pellets is obviously recognized. In the case of CT method, the images clearly show the detailed shape of the cross section in the pellets, in addition, the difference in the enrichment between the natural and enriched pellets is recognized.

Measurement and visualization of void fraction in a tight lattice bundle by high-frame-rate neutron radiography

Kureta, Masatoshi; Akimoto, Hajime

Proceedings of 10th International Symposium on Flow Visualization (ISFV-10) (CD-ROM), 8 Pages, 2002/00

no abstracts in English