Refine your search:     
Report No.
 - 
Search Results: Records 1-20 displayed on this page of 20
  • 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

JAEA Reports

Contribution to risk reduction in decommissioning works by the elucidation of basic property of radioactive microparticles (Contract research); FY2019 Nuclear Energy Science & Technology and Human Resource Development Project

Collaborative Laboratories for Advanced Decommissioning Science; Ibaraki University*

JAEA-Review 2020-033, 84 Pages, 2021/01

JAEA-Review-2020-033.pdf:4.9MB

JAEA/CLADS had been conducting the Nuclear Energy Science & Technology and Human Resource Development Project in FY2019. Among the adopted proposals in FY2018, this report summarizes the research results of the "Contribution to Risk Reduction in Decommissioning Works by the Elucidation of Basic Property of Radioactive Microparticles" conducted in FY2019.

Journal Articles

Preparation of an H$$_{2}$$-permselective silica membrane for the separation of H$$_{2}$$ from the hydrogen iodide decomposition reaction in the iodine-sulfur process

Myagmarjav, O.; Ikeda, Ayumi*; Tanaka, Nobuyuki; Kubo, Shinji; Nomura, Mikihiro*

International Journal of Hydrogen Energy, 42(9), p.6012 - 6023, 2017/03

 Times Cited Count:17 Percentile:59.75(Chemistry, Physical)

Journal Articles

IS process hydrogen production test for components and system made of industrial structural material, 2; H$$_{2}$$SO$$_{4}$$ decomposition, HI distillation, and HI decomposition section

Noguchi, Hiroki; Takegami, Hiroaki; Kamiji, Yu; Tanaka, Nobuyuki; Iwatsuki, Jin; Kasahara, Seiji; Kubo, Shinji

Proceedings of 8th International Topical Meeting on High Temperature Reactor Technology (HTR 2016) (CD-ROM), p.1029 - 1038, 2016/11

JAEA has been conducting R&D on the IS process for nuclear-powered hydrogen production. We have constructed a 100 NL/h-H$$_2$$-scale test apparatus made of industrial materials. At first, we investigated performance of components in this apparatus. In this paper, the test results of H$$_2$$SO$$_4$$ decomposition, HI distillation, and HI decomposition were shown. In the H$$_2$$SO$$_4$$ section, O$$_2$$ production rate is proportional to H$$_2$$SO$$_4$$ feed rate and SO$$_3$$ decomposition ratio was estimated about 80%. In HI distillation section, we confirmed to acquire a concentrated HI solution over azeotropic HI composition in the condenser. In HI decomposition section, H$$_2$$ could be produced stably by HI decomposer and decomposition ratio was about 18%. The H$$_2$$SO$$_4$$ decomposer, the HI distillation column, and the HI decomposer were workable. Based on the results added to that shown in Series I, we conducted a trial continuous operation and succeeded it for 8 hours.

Journal Articles

Seasonal characteristics of chemical compositions of the atmospheric aerosols collected in urban seaside area at Tokaimura, eastern central Japan

Fu, F.; Watanabe, Kazuo; Yabuki, Sadayo*; Akagi, Tasuku*

Journal of Geophysical Research, 109(20), p.D20212_1 - D20212_9, 2004/10

Size-separated aerosol samples were collected at Tokaimura urban seaside area of Japan using an Andersen type sampler during July 2002 to July 2003. The size-separated aerosols were divided into water-soluble and insoluble fractions, and chemical compositions (Na$$^{+}$$, Cl$$^{-}$$, NH$$_{3}$$$$^{+}$$, NO$$_{3}$$$$^{-}$$, SO$$_{4}$$$$^{2-}$$, Al, Ca, Mg, Fe, Pb, Th and U) in both water-soluble and insoluble fractions were analyzed. Then, the seasonal variations and the size-distribution in mass concentration and chemical composition have been investigated in detail. Our results showed that the atmospheric aerosol in Tokaimura was obviously affected by dust storm in China, and that sea-salt particles were bigger than those in the Antarctic and were deficient in chlorine.

Journal Articles

Validation of minor actinide cross sections by studying samples irradiated for 492 days at the dounreay prototype fast reactor, 1; Radiochemical analysis

Shinohara, Nobuo; Kono, Nobuaki; Nakahara, Yoshinori; Tsujimoto, Kazufumi; Sakurai, Takeshi; Mukaiyama, Takehiko*; Raman, S.*

Nuclear Science and Engineering, 144(2), p.115 - 128, 2003/06

no abstracts in English

Journal Articles

Validation of minor actinide cross sections by studying samples irradiated for 492 days at the dounreay prototype fast reactor, 1; Radiochemical analysis

Shinohara, Nobuo; Kono, Nobuaki; Nakahara, Yoshinori; Tsujimoto, Kazufumi; Sakurai, Takeshi; Mukaiyama, Takehiko*; Raman, S.*

Nuclear Science and Engineering, 144(2), p.115 - 128, 2003/06

 Times Cited Count:9 Percentile:55.15(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Melting behavior of low-level radioactive miscellaneous solid waste and characteristics of solidified products (Contract research)

Nakashio, Nobuyuki; Isobe, Motoyasu; Wakui, Takuji*; Iwata, Keiji*; Kibayashi, Tatsuyuki*; Kanazawa, Katsuo; Fukui, Toshiki; Otake, Atsushi*; Nakashima, Mikio; Hirabayashi, Takakuni*

JAERI-Research 2001-001, 19 Pages, 2001/02

JAERI-Research-2001-001.pdf:1.29MB

no abstracts in English

JAEA Reports

The Aqueous solubility and speciation analysis for uranium, neptunium and selenium by the geochemical code (EQ3/6)

Takeda, Seiji; ; Kimura, Hideo; Matsuzuru, Hideo

JAERI-Research 95-069, 47 Pages, 1995/11

JAERI-Research-95-069.pdf:1.65MB

no abstracts in English

Journal Articles

Chemical effectiveness of elastic and inelastic energy loss of He$$^{+}$$,Ar$$^{+}$$,and Xe$$^{+}$$ ions bombarding solid potassium nitrate

Ono, Shinichi; ;

Bulletin of the Chemical Society of Japan, 59(6), p.1947 - 1951, 1986/00

 Times Cited Count:2 Percentile:25.53(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

Decomposition of solid potassium nitrate by incident 100 keV ions

; Ono, Shinichi

Bulletin of the Chemical Society of Japan, 58, p.1831 - 1832, 1985/00

 Times Cited Count:1 Percentile:22.87(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

Studies on the nickel・iodine・sulfur process for hydrogen production

; Shimizu, Saburo; Nakajima, Hayato; ; Ikezoe, Yasumasa;

Int.J.Hydrogen Energy, 9(3), p.191 - 196, 1984/00

 Times Cited Count:5 Percentile:73.43(Chemistry, Physical)

no abstracts in English

Journal Articles

Kinetics of the thermal decomposition of nickel sulfate

; Shimizu, Saburo; Nakajima, Hayato; Ikezoe, Yasumasa;

Bulletin of the Chemical Society of Japan, 56, p.3294 - 3296, 1983/00

 Times Cited Count:1 Percentile:15.02(Chemistry, Multidisciplinary)

no abstracts in English

JAEA Reports

Studies on Closed-Cycle Processes for Hydrogen Production V (Progress Report for the F. Y. 1980)

; Ikezoe, Yasumasa; ; Shimizu, Saburo; Nakajima, Hayato;

JAERI-M 9724, 128 Pages, 1981/10

JAERI-M-9724.pdf:3.66MB

no abstracts in English

Journal Articles

Utilization of reactor heat and hydrogen energy

Nihon Genshiryoku Gakkai-Shi, 18(11), p.685 - 690, 1976/11

no abstracts in English

Journal Articles

A New class of thermochemical hydrogen production processes

; Nakajima, Hayato

Journal of Nuclear Science and Technology, 12(10), p.659 - 660, 1975/10

 Times Cited Count:1

no abstracts in English

Journal Articles

Preparation of Zircaloy Standards Sample for Chemical Composition Analysis

; ; *; *; *

Trans.International Vacuum Metallurgy Conference, p.553 - 577, 1970/00

no abstracts in English

Oral presentation

The Analytical prediction of inventories and physicochemical composition of spallation products produced in Lead-Bismuth Eutectic of Accelerator Driven System

Miyahara, Shinya*; Arita, Yuji*; Ohdaira, Naoya*; Sasa, Toshinobu; Maekawa, Fujio; Matsuda, Hiroki

no journal, , 

Lead-Bismuth Eutectic (LBE) is used as a spallation neutron target and coolant materials of Accelerator Driven System (ADS), and many kinds of elements are produced as spallation products. It is important to evaluate the release and transport behavior of the spallation products in the LBE. The inventories and the physicochemical composition of the spallation products produced in LBE have been investigated for an LBE loop in the ADS Target Test Facility (TEF-T) in J-PARC. The inventories of the spallation products in the LBE were estimated using the PHITS code. The physicochemical composition of the spallation products in the LBE was calculated using the Thermo-Calc code under the conditions of the operation temperatures of LBE from 350$$^{circ}$$C to 500$$^{circ}$$C and the oxygen concentrations in LBE from 10 ppb to 1 ppm. The calculation showed that the 5 elements of Hg, Tl, Au, Os, Tc were soluble in LBE under the all given conditions and any kinds of compound were not formed in LBE. It was suggested that the oxides of Ce, Zr and Y were stable as CeO$$_{2}$$, ZrO$$_{2}$$ and Y$$_{2}$$O$$_{3}$$ in the LBE.

Oral presentation

Machine learning for activity evaluation of crush zones using chemical composition; Introduction of examples

Shimada, Koji; Tateishi, Ryo*

no journal, , 

We need a method to assess the activity of crush zones alternative to the application of overlying sediments, because the zones encountered in underground tunnels and boring have unknown extensions to the ground surface. The method to be developed is one in which the result is objective and independent of the person, which helps professional judgment. In addition, implementation, dissemination and verification must be executable by a general geological engineer. In light of these goals, the whole-rock chemical composition of the fault gouge along a principal slip zone of the crush zone is attractive. Is there any difference in the chemical composition of fault rocks between active and inactive faults? We thought that the utilization of multivariate analysis could be a solution. Therefore, we collected literature values of the chemical composition of fault gouges for faults with known activities, and began searching for a primary equation that distinguishes active from non-active faults by multivariate analysis in 2018. The results of studies on granitic rocks show that there are multiple discriminants that separate active and non-active faults with a discrimination rate of 100%. In the presentation, we would like to introduce the current status of initiatives, including past case studies.

20 (Records 1-20 displayed on this page)
  • 1