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Materials Sciences Research Center
JAEA-Review 2024-037, 141 Pages, 2024/11
JAEA-Review-2024-037.pdf:13.08MB
Fifteen neutron beam experimental instruments managed by JAEA are installed in JRR-3 (Japan Research Reactor No.3) and are available for internal use including upgrading of instruments and for external users to produce various research results. This report summarizes the progress of internal application research and technical development such as upgrading of neutron beam instruments in the fiscal years 2021 and 2022 after the restart of operation.
Nakano, Keita; Iwamoto, Hiroki; Nishihara, Kenji; Meigo, Shinichiro; Sugawara, Takanori; Iwamoto, Yosuke; Takeshita, Hayato*; Maekawa, Fujio
JAEA-Research 2021-018, 41 Pages, 2022/03
JAEA-Research-2021-018.pdf:2.93MB
Neutronic analysis of beam window of the Accelerator-Driven System (ADS) proposed by Japan Atomic Energy Agency (JAEA) has been conducted using PHITS and DCHAIN-PHITS codes. We investigate gas production of hydrogen and helium isotopes in the beam window, displacement per atom of beam window material, and heat generation in the beam window. In addition, distributions of produced nuclides, heat density, and activity are derived. It was found that at the maximum 12500 appm H production, 1800 appm He production, and damage of 62.1 DPA occurred in the beam window by the ADS operation. On the other hand, the maximum heat generation in the beam window was 374 W/cm
. In the analysis of LBE, 
Bi and 
Po were found to be the dominant nuclides in decay heat and radioactivity. Furthermore, the heat generation in the LBE by the proton beam was maximum around 5 cm downstream of the beam window, which was 945 W/cm.
Kubota, Naoyoshi; Ochiai, Kentaro; Kutsukake, Chuzo; Kondo, Keitaro*; Shu, Wataru; Nishi, Masataka; Nishitani, Takeo
Fusion Engineering and Design, 81(1-7), p.227 - 231, 2006/02
Times Cited Count：5 Percentile：35.43(Nuclear Science & Technology)Hydrogen isotopes play important roles in the fuel recycling, the plasma condition etc. at the surface region of plasma facing components. The Fusion Neutronics Source (FNS) of Japan Atomic Energy Research Institute has started microanalysis studies for fusion components since 2002 by applying the beam analyses. In this study, we have measured tritium depth profiles of TFTR tiles exposed to the deuterium-tritium plasma to reveal the hydrogen isotope behavior at the surface region using some microscopic techniques for material analyses at FNS. As the result of the deuteron nuclear reaction analysis, four kinds of elements; deuterium, tritium, lithium-6 and lithium-7, were identified from the energy spectra. Using the spectra, depth profiles of each element were also calculated. The tritium profile had a peak at 0.5 micron, whereas the deuterium and lithium profiles were uniform from the surface to 1.0 micron depth. In addition, the surface region of the TFTR tile has retained the tritium more than one order of magnitude in the bulk.
Oigawa, Hiroyuki; Tsujimoto, Kazufumi; Kikuchi, Kenji; Kurata, Yuji; Sasa, Toshinobu; Umeno, Makoto*; Nishihara, Kenji; Saito, Shigeru; Mizumoto, Motoharu; Takano, Hideki*; et al.
Proceedings of 4th International Workshop on the Utilisation and Reliability of High Power Proton Accelerators, p.325 - 334, 2005/11
The Japan Atomic Energy Research Institute (JAERI) is conducting the research and development (R&D) on the Accelerator-Driven Subcritical System (ADS) for the effective transmutation of minor actinides (MAs). The ADS proposed by JAERI is the 800 MWth, Pb-Bi cooled, tank-type subcritical reactor loaded with (MA+Pu) nitride fuel. The Pb-Bi is also used as the spallation target. In this study, the feasibility of the ADS was discussed with putting the focus on the design around the beam window. The partition wall was placed between the target region and the ductless-type fuel assemblies to keep the good cooling performance for the hot-spot fuel pin. The flow control nozzle was installed to cool the beam window effectively. The thermal-hydraulic analysis showed that the maximum temperature at the outer surface of the beam window could be repressed below 500 
C even in the case of the maximum beam power of 30 MW. The stress caused by the external pressure and the temperature distribution of the beam window was also below the allowable limit.
Advanced Radiation Technology Center
JAERI-Review 2004-025, 374 Pages, 2004/11
JAERI-Review-2004-025-p0001-p0116.pdf:20.67MBJAERI-Review-2004-025-p0117-p0247.pdf:21.34MBJAERI-Review-2004-025-p0248-p0374.pdf:23.39MB
This annual report describes research and development activities which have been performed with the JAERI TIARA (Takasaki Ion Accelerators for Advanced Radiation Application) facilities from April 1, 2003 to March 31, 2004. Summary reports of 115 papers and brief descriptions on the status of TIARA in the period are contained. A list of publications, the type of research collaborations and organization of TIARA are also given as appendices.
Takahashi, Toshiyuki; Research Reactor Utilization Division
JAERI-Review 2004-016, 542 Pages, 2004/08
JAERI-Review-2004-016.pdf:74.07MB
no abstracts in English
Advanced Radiation Technology Center
JAERI-Review 2003-033, 390 Pages, 2003/11
JAERI-Review-2003-033-p0001-p0187.pdf:18.1MBJAERI-Review-2003-033-p0188-p0390.pdf:15.87MB
This annual report describes research and development activities which have been performed with the JAERI TIARA (Takasaki Ion Accelerators for Advanced Radiation Application) facilities from April 1, 2002 to March 31, 2003. Summary reports of 113 papers and brief descriptions on the status of TIARA in the period are contained. A list of publications, the type of research collaborations and organization of TIARA are also given as appendices.
Research Reactor Utilization Division
JAERI-Review 2003-019, 484 Pages, 2003/07
JAERI-Review-2003-019.pdf:29.68MB
no abstracts in English
Vacik, J.; Naramoto, Hiroshi; Narumi, Kazumasa; Yamamoto, Shunya; Abe, Hiroaki*
Nuclear Instruments and Methods in Physics Research B, 206, p.395 - 398, 2003/05
Times Cited Count：9 Percentile：52.47(Instruments & Instrumentation)no abstracts in English
Teraoku, Takuji*; Terada, Atsuhiko*; Maekawa, Fujio; Meigo, Shinichiro; Kaminaga, Masanori; Ishikura, Shuichi*; Hino, Ryutaro
JAERI-Tech 2003-026, 77 Pages, 2003/03
JAERI-Tech-2003-026.pdf:19.78MB
A 1-MW spallation neutron source aiming at materials and life science researches will be constructed under the JAERI-KEK Proton Accelerator Project(J-PARC). The proton beam window functions as a boundary wall between a high vacuum area and a helium atmosphere and it is cooled by light water because high heat-density is generated in the window material by interactions with the proton beam. Then, uniformity of the water flow is requested at the window to suppress a hot-spot that causes excessive thermal stress and cooling water boiling. Also, the window has to be strong enough in its structure for inner stress due to water pressure and thermal stress due to heat generation. In this report, we propose two types of proton beam windows, flat-type and curved-type. We evaluated the strength of structure and thermal hydraulic analysis. As a result, it was found that sufficient heat removal was assured with uniform water flow at the window, and the stress could be maintained below allowable stress values. Accordingly, it was confirmed that the proton beam window designs were feasible.
Advanced Radiation Technology Center
JAERI-Review 2002-035, 361 Pages, 2002/11
JAERI-Review-2002-035-p0001-p0112.pdf:14.61MBJAERI-Review-2002-035-p0113-p0236.pdf:19.49MBJAERI-Review-2002-035-p0237-p0361.pdf:12.43MB
This annual report describes research and developement activities which have been performed with the JAERI TIARA (Takasaki Ion Accelerators for Advanced Radiation Application) Facilities from April 1, 2001 to March 31, 2002. Summary reports of 109 papers and brief descriptions on the status of TIARA in the period are contained. A list of publications, the type of research collaborations and organization of TIARA are also given as appendices.
Takahashi, Toshiyuki
JAERI-Review 2002-014, 491 Pages, 2002/08
JAERI-Review-2002-014.pdf:30.53MB
no abstracts in English
Toyoda, Masayuki*
JAERI-Review 2001-004, 494 Pages, 2001/03
JAERI-Review-2001-004.pdf:31.77MB
no abstracts in English
Committee for the Joint Research Project on the Advanced Radiation Technology; Committee for the Collaborative Research on the Advanced Radiation Technology
JAERI-Conf 2000-008, 113 Pages, 2000/06
JAERI-Conf-2000-008.pdf:11.5MB
no abstracts in English
Toyoda, Masayuki*; Koyama, Yoshimi
JAERI-Review 2000-004, p.398 - 0, 2000/03
JAERI-Review-2000-004.pdf:19.39MB
no abstracts in English
Naramoto, Hiroshi; Yamamoto, Shunya; Narumi, Kazumasa
JAERI-Review 99-025, TIARA Annual Report 1998, p.191 - 192, 1999/10
no abstracts in English
;
JAERI-Review 99-007, 528 Pages, 1999/03
JAERI-Review-99-007.pdf:29.12MB
no abstracts in English
thin films prepared in different ambients by laser ablationDai, Z.*; Naramoto, Hiroshi; Yamamoto, Shunya; Narumi, Kazumasa; Miyashita, Atsumi
Journal of Physics; Condensed Matter, 11(3), p.913 - 925, 1999/00
Times Cited Count：4 Percentile：27.97(Physics, Condensed Matter)no abstracts in English
Asano, Yoshihiro; Sasamoto, Nobuo
Radiation Protection Dosimetry, 82(3), p.167 - 174, 1999/00
Times Cited Count：9 Percentile：56.38(Environmental Sciences)no abstracts in English
epitaxial thin film onto sapphire substrateDai, Z.*; P.Zhu*; Yamamoto, Shunya; Miyashita, Atsumi; Narumi, Kazumasa; Naramoto, Hiroshi
Thin Solid Films, 339(1-2), p.114 - 116, 1999/00
Times Cited Count：29 Percentile：78.70(Materials Science, Multidisciplinary)no abstracts in English
