Refine your search:     
Report No.
 - 
Search Results: Records 1-9 displayed on this page of 9
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Solvent effect in supercritical carbon dioxide extraction of metal ions

Meguro, Yoshihiro; Ogiyanagi, Jin*; Tomioka, Osamu; Imura, Hisanori*; Ohashi, Kozaburo*; Yoshida, Zenko; Nakashima, Mikio

Proceedings of 2nd International Symposium on Supercritical Fluid Technology for Energy and Environment Applications (Super Green 2003), p.175 - 179, 2004/00

One of the most attractive properties of SFE is that changing solvent properties by tuning pressure can control distribution behavior of a metal ion. Distribution ratio (D) of uranium(VI) and plutonium(IV) with tributyl phosphate (TBP) from a nitric acid solution and palladium(II) with 2-methyl-8-qunolinol (HMQ) from a hydrochloric solution were determined in SFE at various pressures. In the extraction system using TBP, a linear relationship between the logarithmic distribution ratio (log D) and the solubility parameter of CO$$_{2}$$ was observed. The solubility parameter is difined based on the regular solution theory and is one of the parameters depending on the pressure. On the other hand, a linear relationship with a positive slope between log D and the solubility parameter was observed in the extraction system using HMQ. Most of the extractant was dissolved in the aqueous phase as H$$_{2}$$MQ$$^{+}$$ under the extraction condition examined.

JAEA Reports

None

*

JNC-TN1400 2001-013, 70 Pages, 2001/08

JNC-TN1400-2001-013.pdf:5.13MB

no abstracts in English

Journal Articles

X-ray diffraction technique in energy-dispersive mode at SPring-8 for fluids at high temperatures and high pressures

Tamura, Kozaburo*; Inui, Masanori*; Funakoshi, Kenichi*; Utsumi, Wataru

Nuclear Instruments and Methods in Physics Research A, 467-468(Part2), p.1065 - 1068, 2001/07

 Times Cited Count:3 Percentile:69.59

no abstracts in English

JAEA Reports

A Design study of high electric power for fast reactor cooled by super critical light water

Koshizuka, Seiichi*

JNC-TJ9400 2000-011, 102 Pages, 2000/03

JNC-TJ9400-2000-011.pdf:2.71MB

In order to evaluate the possibility to achieve high electric power by a fast reactor with supercritical light water, the design study was carried out on a large fast reactor core with high coolant outlet temperature (SCFR-H). Since the reactor coolant circuit uses once-through direct cycle where all feedwater flows through the core to the turbine at supercritical pressure, it is possible to design much simpler and more compact reactor systems and to achieve higher thermal efficiency than those of current light water reactors. The once-through direct cycle system is employed in current fossil-fired power plants. In the present study, three types of core were designed. The first is SCFR-H with blankets cooled by ascending flow, the second is SCFR-H with blankets cooled by descending flow and the third is SCFR-H with high thermal power. Every core was designed to achieve the thermal efficiency over 43%, positive coolant density reactivity coefficient and electric power over 1600MW. Core characteristics of SCFR-Hs were compared with those of SCLWR-H (electric power: 1212MW), which is a thermal neutron spectrum reactor cooled and moderated by supercritical light water, with the same diameter of the reactor pressure vessel. It was shown that SCFR-H could increase the electric power about l.7 times maximally. From the standpoint of the increase of a reactor thermal power, a fast reactor has advantages as compared with a thermal neutron reactor, because it can increase the power density by adopting tight fuel lattices and eliminating the moderator region. Thus, it was concluded that a reactor cooled by supercritical light water could further improve the cost competitiveness by using a fast neutron spectrum and achieving a higher thermal power.

Journal Articles

Structural studies of metallic fluids at SPring-8

Tamura, Kozaburo*; Inui, Masanori*; Tsuji, Kazuhiko*; Funakoshi, Kenichi*; Utsumi, Wataru

Nippon Kessho Gakkai-Shi, 42(1), p.33 - 40, 2000/02

no abstracts in English

Journal Articles

Application of time-resolved fluorescence spectroscopy to supercritical fluid study

Kimura, Takaumi

Bunseki, (291), p.246 - 247, 1999/00

no abstracts in English

Journal Articles

Pressure-dependence of extraction equilibrium of uranium and plutonium ions in a HNO$$_{3}$$/supercritical CO$$_{2}$$-tributyl phosphate system

Meguro, Yoshihiro; ; *; Takeishi, Hideyo; Sasaki, Takayuki*; Yoshida, Zenko

Proc. of Int. Trace Analysis Symp. '98 (ITAS'98), p.25 - 26, 1998/00

no abstracts in English

Journal Articles

Separation of geometric isomers of metal $$beta$$-diketonates by supercritical fluid chromatography

K.E.Laintz*; Meguro, Yoshihiro; ; Tachikawa, Enzo

J. High Resolut. Chromatogr., 16, p.372 - 375, 1993/06

no abstracts in English

Oral presentation

Study on characteristics of high permeability granite under high temperature condition and construction of hydraulic structure model

Nohara, Tsuyoshi; Takesue, Norito; Matsumura, Toshihiro*; Nakagiri, Toshio; Takeuchi, Shinji*

no journal, , 

It was reported that traces of high and low permeable zones formed by the supercritical fluid flow through granite have been observed in Japan. These traces directly related to current permeability. In this study, we will improve the investigation methods and evaluation technologies considering the influence of supercritical fluids through case studies in the Ningyo-toge area. In this presentation, we will introduce the research plan and the preliminary results.

9 (Records 1-9 displayed on this page)
  • 1