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Oral presentation

Theoretical research on surrogate reaction, 2; Application of unified model to surrogate reaction

Aritomo, Yoshihiro; Chiba, Satoshi; Hashimoto, Shintaro; Utsuno, Yutaka; Koura, Hiroyuki

no journal, , 

no abstracts in English

Oral presentation

$$^6$$Li+n inelastic reactions in the Continuum Discredited Coupled Channels (CDCC) method

Ichinkhorloo, D.*; Matsumoto, Takuma*; Hirabayashi, Yoshiharu*; Kato, Kiyoshi*; Chiba, Satoshi

no journal, , 

The few-body, especially three-body, problem is still an open (and therefore interesting) subject in nuclear physics, and has been studied intensively by various theoretical frameworks. The n + $$^6$$Li reactions are important not only from the basic interest but also from the application point of view. The $$^6$$Li nucleus is well described by the cluster model such as $$alpha$$ + d and $$alpha$$ + p + n. Therefore, it is necessary for us to treat the n + $$^6$$Li system with $$alpha$$ + p + n and $$alpha$$ + p + n + n models. In this work, we study the $$^6$$Li+n inelastic reactions applying the $$alpha$$ + d cluster model to $$^6$$Li and using the continuum-discredited coupled-channels (CDCC) approach.

Oral presentation

Development of signal processing and circuit technology for high-accuracy radiation and neutron measurements, 2; Novel signal processing circuit for high-accuracy imaging

Ebine, Masumi; Katagiri, Masaki*; Nakamura, Tatsuya; Birumachi, Atsushi; Hosoya, Takaaki*

no journal, , 

no abstracts in English

Oral presentation

Radioactive aerosol particle behaviors in the cutting test for contaminated piping of Fugen Reactor

Shimada, Taro; Takamura, Atsushi*; Kamiya, Atsushi*; Sukegawa, Takenori; Tanaka, Tadao

no journal, , 

Dispersion ratios, size distribution of particles and filtration efficiencies were measured when piping for reactor cooling system at Fugen reactor was segmented in the contamination control enclosure. Dispersion ratio of Co-60 was observed to be 18 to 23% for normal piping and that to be 34 to 43% for vertically segmented piping, which was half of the normal. Filtration efficiency of pre-filter was observed to be 55 to 80%, while particles smaller than 1micrometer were not able to be collected. It was confirmed that the filtration efficiency of HEPA filter was more than 99.9% for Co-60.

Oral presentation

Fundamental study on electrolyte recycle process by phosphate conversion technique, 9; Study on sorption mechanism of iron phosphate-glass as sorbent

Amamoto, Ippei; Kofuji, Hirohide; Tsuzuki, Tatsuya*; Mitamura, Naoki*; Takasaki, Yasushi*; Shibayama, Atsushi*; Yano, Tetsuji*; Terai, Takayuki*

no journal, , 

   Patent publication (In Japanese)

no abstracts in English

Oral presentation

Calculation for transportation efficiency improvement of the neutron straight guide section of C3 cold neutron guides at JRR-3, 1

Tamura, Itaru; Arai, Masaji; Komeda, Masao; Sagawa, Hisashi

no journal, , 

no abstracts in English

Oral presentation

Development of the laser pulse-compression system for the Compton backscattered photon source

Kawase, Keigo; Shimomura, Takuya; Kando, Masaki; Yoshida, Hidetsugu*; Bulanov, S. V.

no journal, , 

In the development of the Compton backscattered X-ray source by using the Microtron accelerator and the Nd:YAG laser, we are constructing the laser pulse compression system via stimulated Brillouin scattering for increasing the flux of the X-ray beam. In this annual meeting, we report the present status of the development of the pulse-compression system.

Oral presentation

Design and R&D activities for ITER-TBM, 1; Preliminary test on assembly of ITER-TBM box-structure using electron-beam-welding

Hirose, Takanori; Tanigawa, Hiroyasu; Enoeda, Mikio

no journal, , 

no abstracts in English

Oral presentation

Corrosion test of materials for steam reformer

Nakagawa, Akinori; Sone, Tomoyuki; Sasaki, Toshiki; Nakazawa, Osamu; Tashiro, Kiyoshi

no journal, , 

no abstracts in English

Oral presentation

Simulation of the residue stress due to welding in core shroud of boiling water reactor

Li, Y.; Kaji, Yoshiyuki; Igarashi, Takahiro

no journal, , 

Oral presentation

Development of analytical procedure for boiling two-phase flow in rod bundles, 1; Development of advanced two-fluid model

Yoshida, Hiroyuki; Hosoi, Hideaki; Suzuki, Takayuki*

no journal, , 

no abstracts in English

Oral presentation

Study on ageing behavior of reprocessing plants, 2; Electrochemical data in actinide solution for evaluation of corrosion

Kim, S.-Y.; Morita, Yasuji; Hakamatsuka, Yasuyuki; Ueno, Fumiyoshi; Yamamoto, Masahiro; Uchiyama, Gunzo; Nojima, Yasuo*; Fujine, Sachio*

no journal, , 

Electrochemical data of Pu and Np at stainless steel electrode and platinum electrode are obtained as fundamental data for the effect of these elements on the material corrosion at the boiling surface. Natural electric potential became constant within 1 hour and the existence of these elements increased the potential.

Oral presentation

Corrosion behavior of Fe, Cr, and Ni in molten sodium molybdate

Nagai, Takayuki; Kikuchi, Kotaro*; Kano, Yoshiharu*; Hirano, Hiroyasu

no journal, , 

On the dry reprocessing process study by using a molten sodium molybdate, the SUS316 stainless steel of clad material was dissolved into the melt. In this study, we carried out the immersed corrosion test of Fe, Cr, and Ni in molten sodium molybdate, and estimated the corrosion behavior of these material and dissolution content in the melt.

Oral presentation

$$alpha$$-radiolysis of extractant for separation of minor actinides by helium ion beam

Sugo, Yumi; Taguchi, Mitsumasa; Sasaki, Yuji; Hirota, Koichi; Morita, Yasuji

no journal, , 

no abstracts in English

Oral presentation

Experiential evaluation of cutting dust generated by underwater-plasma arc cutting of calandria tube

Hayashi, Hirokazu; Sano, Kazuya; Morishita, Yoshitsugu; Shigeta, Tatsuo*; Amada, Kenichi*

no journal, , 

no abstracts in English

Oral presentation

A Study on relationship between groundwater flow modeling and characterization of geological environment; A Case of Horonobe area in Hokkaido

Maekawa, Keisuke; Ishii, Eiichi; Shimo, Michito*; Kumamoto, So*

no journal, , 

no abstracts in English

Oral presentation

Incorporating the terrain effects into high-resolution atmospheric dispersion model of SPEEDI-MP

Nakayama, Hiromasa; Nagai, Haruyasu

no journal, , 

The dispersion analysis of airborne contaminant including radioactive substances from industrial or nuclear facilities is the important issue for maintenance of air quality or safety assessment. In Japan, many nuclear power plants are located at complex coastal terrains. In this case, terrain effects on the turbulent flow and plume dispersion should be investigated. Therefore, we perform Large-Eddy Simulations (LES) on turbulent flow and plume dispersion over a 2-dimensional hill flow and investigate the characteristics of mean and fluctuation concentrations.

Oral presentation

Estimation of higher-order eigenvalues from residual of power iteration

Nakase, Masahiko*; Chiba, Go; Saito, Masaki*

no journal, , 

Higher-order eigenvalues can be useful indices for reactor core stability. Usually, higher-order eiganvalues are calculated with the subtraction method in which several numerical techniques are necessary. In this present study, we develop a simple method to estimate higher-order eigenvalues from a residual of power iteration. Through numerical calculations with the IAEA benchmark problem, the present method estimates higher-order eigenvalues up to the 5th order quite well.

253 (Records 1-20 displayed on this page)