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Iwamoto, Hiroki; Nishihara, Kenji; Iwamoto, Yosuke; Hashimoto, Shintaro; Matsuda, Norihiro; Sato, Tatsuhiko; Harada, Masahide; Maekawa, Fujio
Journal of Nuclear Science and Technology, 53(10), p.1585 - 1594, 2016/10
Times Cited Count：18 Percentile：85.32(Nuclear Science & Technology)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.
Tsujimoto, Kazufumi; Oigawa, Hiroyuki; Ouchi, Nobuo; Kikuchi, Kenji; Kurata, Yuji; Mizumoto, Motoharu; Sasa, Toshinobu; Nishihara, Kenji; Saito, Shigeru; Umeno, Makoto*; et al.
Proceedings of International Conference on Nuclear Energy System for Future Generation and Global Sustainability (GLOBAL 2005) (CD-ROM), 6 Pages, 2005/10
The Japan Atomic Energy Research Institute (JAERI) has been proceeding with the research and development (R&D) on accelerator-driven subcritical system (ADS). The ADS proposed by JAERI is a lead-bismuth (Pb-Bi) eutectic cooled fast subcritical core with 800 MWth. To realize such an ADS, some technical issues should be studied, developed and demonstrated. JAERI has started a comprehensive R&D program since the fiscal year of 2002 to acquire knowledge and elemental technology that are necessary for the validation of engineering feasibility of the ADS. The first stage of the program had been continued for three years. The program is conducted by JAERI, and many institutes, universities and private companies were involved. Items of R&D are concentrated on three technical areas peculiar to the ADS: (1) superconducting linear accelerator (SC-LINAC), (2) Pb-Bi eutectic as spallation target and core coolant, and (3) subcritical core design and technology. In the present work, the outline and the results in the first stage of the program are reported.
Takada, Hiroshi; Maekawa, Fujio; Honmura, Shiro*; Yoshida, Katsuhiko*; Teraoku, Takuji*; Meigo, Shinichiro; Sakai, Akio*; Kasugai, Yoshimi; Kanechika, Shuji*; Otake, Hidenori*; et al.
Proceedings of ICANS-XVI, Volume 3, p.1115 - 1125, 2003/07
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.
Oigawa, Hiroyuki; Ouchi, Nobuo; Kikuchi, Kenji; Tsujimoto, Kazufumi; Kurata, Yuji; Sasa, Toshinobu; Takano, Hideki; Nishihara, Kenji; Saito, Shigeru; Futakawa, Masatoshi; et al.
Proceedings of GLOBAL2003 Atoms for Prosperity; Updating Eisenhower's Global Vision for Nuclear Energy (CD-ROM), p.1374 - 1379, 2003/00
JAERI is developing an Accelerator Driven System (ADS) for transmutation of nuclear waste such as minor actinide and long-lived fission product. To acquire the knowledge and the elemental technology that are necessary for the validation of engineering feasibility of ADS, JAERI has started a comprehensive research and development (R&D) program since 2002. The first stage of the program will be continued for three years. The program is conducted by JAERI with many institutes, universities and private companies. Items of R&D are concentrated on three technical areas peculiar to ADS: (1) a superconducting linear accelerator, (2) lead-bismuth eutectic as spallation target and core coolant, and (3) subcritical core design and physics. The outline and the preliminary results of the program are summarized in the present report.
Kaminaga, Masanori; Kinoshita, Hidetaka; Haga, Katsuhiro; Hino, Ryutaro; Sudo, Yukio
Proceedings of International Workshop on Current Status and Future Directions in Boiling Heat Transfer and Two-Phase Flow, p.135 - 141, 2000/00
no abstracts in English
*; X.Chen*; *; Harada, Hideo*; ; Takizuka, Takakazu; Sasa, Toshinobu
Proc. of 2nd Int. Conf. on Accelerator-Driven Transmutation Technologies and Applications, 2, p.960 - 966, 1996/00
no abstracts in English
Oi, Motoki; Yamaguchi, Yuji; Kinoshita, Hidetaka; Meigo, Shinichiro; Haga, Katsuhiro
no journal, ,
Material and Life science experimental facility (MLF) in J-PARC is a spallation neutron source which uses 3 GeV proton beam with 1 MW power. The neutron production target is made with mercury and the target vessel is installed in the helium vessel. On the other hands, proton beam transport line is kept in high vacuum, less than 10
Pa to reduce the beam loss. As a boundary of the helium atmosphere and the vacuum region, proton beam window (PBW) is installed. The proton beam window is made with aluminum alloy. Due to the radiation damage of the window, lifetime of the PBW is estimated 10000 MWh. In this summer maintenance period, we replace from the PBW No. 4 to PBW No. 5. In this presentation, we report about life cycle, the structure and replacement work of the PBW.
Meigo, Shinichiro
no journal, ,
Material damage index of displacement per atom (dpa) is calculated by the particle flux and the displacement cross section. Since the experimental data of the displacement cross section was scarce, the measurements using protons were conducted, and the experimental data of protons up to 30 GeV have been obtained in J-PARC. The displacement cross section was almost constant regardless of the projectile proton energy above several GeV, which is against the expectation because the heat deposition given by the proton increases as projectile energy due to the relativistic theory. The experiment with 120 GeV protons at FNAL was conducted to obtain the data for high-energy regions. To extend the energy region, the experiment with 430-GeV protons at HiRadMat is planned for the following year. Additionally, a new beam irradiation facility plan at J-PARC with 0.4-GeV protons to study material radiation damage will be presented in this talk.
