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Journal Articles

Optimization of a slab geometry type cold neutron moderator for RIKEN accelerator-driven compact neutron source

Ma, B.*; Teshigawara, Makoto; Wakabayashi, Yasuo*; Yan, M.*; Hashiguchi, Takao*; Yamagata, Yutaka*; Wang, S.*; Ikeda, Yujiro*; Otake, Yoshie*

Nuclear Instruments and Methods in Physics Research A, 995, p.165079_1 - 165079_7, 2021/04

We have optimized a cold neutron moderator to be operated at the RIKEN accelerator-driven compact neutron source. We selected a safe and easy to manage material, mesitylene, as the RANS cold moderator. An efficient moderator system was designed by studying and optimizing a coupled cold neutron moderator of mesitylene at 20 K with a polyethylene (PE) pre-moderator at room temperature in the slab geometry with Particle and Heavy Ion Transport code System (PHITS) simulations. The parameters of mesitylene and PE thickness, the reflector, and the shielding configuration were studied to increase cold neutron intensities. Consequently, an integrated cold neutron intensity of 1.15$$times$$10$$^{3}$$n/cm$$^{2}$$/$$mu$$A at 2 m from the neutron-producing target was finally achieved, which was 12 times higher than that of the current PE moderator. The results showed attractive application prospect of mesitylene as cold neutron moderator material.

JAEA Reports

Developments of high-performance moderator vessel for JRR-3 cold neutron source

Arai, Masaji; Tamura, Itaru; Hazawa, Tomoya

JAEA-Technology 2015-010, 52 Pages, 2015/05

JAEA-Technology-2015-010.pdf:7.11MB

In the Department of Research Reactor and Tandem Accelerator, developments of high-performance CNS moderator vessel that can produce cold neutron intensity about two times higher compared to the existing vessel have been performed in the second medium term plans. We compiled this report about the technological development to solve several problems with the design and manufacture of new vessel. In the present study, design strength evaluation, mockup test, simulation for thermo-fluid dynamics of the liquid hydrogen and strength evaluation of the different-material-bonding were studied. By these evaluation results, we verified that the developed new vessel can be applied to CNS moderator vessel of JRR-3.

Journal Articles

Neutron facility at high intensity proton accelerator project

Oyama, Yukio; Ikeda, Yujiro

Hoshasen To Sangyo, (107), p.45 - 51, 2005/09

JAERI and KEK are jointly conducting high intensity proton accelerator project (J-PARC). The outline of the J-PARC project and a design concept of the neutron source facility at J-PARC are described in detail.

Journal Articles

Thermal-hydraulic design of J-PARC cold moderators

Aso, Tomokazu; Sato, Hiroshi; Kaminaga, Masanori; Hino, Ryutaro; Monde, Masanori*

Proceedings of ICANS-XVI, Volume 2, p.935 - 944, 2003/07

no abstracts in English

Journal Articles

Thermal-hydraulic experiments and analyses for cold moderators

Aso, Tomokazu; Kaminaga, Masanori; Hino, Ryutaro; Monde, Masanori*

Proceedings of 11th International Conference on Nuclear Engineering (ICONE-11) (CD-ROM), 8 Pages, 2003/04

no abstracts in English

Journal Articles

Present status and future prospect of JRR-3 and JRR-4

Sakurai, Fumio; Horiguchi, Yoji; Kobayashi, Shinsho; Takayanagi, Masaji

Physica B; Condensed Matter, 311(1-2), p.7 - 13, 2002/01

 Times Cited Count:8 Percentile:39.68(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Current status and future plan of neutron beam facility at JRR-3M

; ; ; Kaieda, Keisuke

KAERI/GP-128/98, p.205 - 221, 1998/00

no abstracts in English

Journal Articles

A Conceptual design study of target-moderator-reflector system for JAERI 5MW spallation source

Watanabe, Noboru*; Teshigawara, Makoto*; Takada, Hiroshi; Nakashima, Hiroshi; Oyama, Yukio; *; Kai, Tetsuya; Ikeda, Yujiro; Kosako, Kazuaki*

Proc. of 14th Meeting of the Int. Collaboration on Advanced Neutron Sources (ICANS-14), 2, p.728 - 742, 1998/00

no abstracts in English

Journal Articles

Cold neutron source facility and neutron guide tube in JRR-3M; Characteristics and construction/operation experiences

Kumai, Toshio; ; Takayanagi, Masaji

ASRR-V: Proc., 5th Asian Symp. on Research Reactors, 2, p.619 - 626, 1996/00

no abstracts in English

JAEA Reports

Characteristics of the JRR-3M neutron guide tubes

Suzuki, Masatoshi; *; Ichikawa, Hiroki

JAERI-M 92-201, 17 Pages, 1993/01

JAERI-M-92-201.pdf:0.79MB

no abstracts in English

JAEA Reports

Fundamental experiment on the concentric tube type closed circuit thermosyphon for JRR-3 cold neutron source, II

Kumai, Toshio; *; ; Akutsu, Cho; Takahashi, Hidetake

JAERI-M 89-114, 32 Pages, 1989/09

JAERI-M-89-114.pdf:1.16MB

no abstracts in English

JAEA Reports

Fundamenntal Experiments on Closed Thermosyphon for JRR-3 Cold Neutoron Source(I)

; *; ;

JAERI-M 87-006, 19 Pages, 1987/02

JAERI-M-87-006.pdf:2.32MB

no abstracts in English

Oral presentation

Performance degradation of helium refrigerator for cryogenic hydrogen system at J-PARC

Aso, Tomokazu; Teshigawara, Makoto; Hasegawa, Shoichi; Muto, Hideki*; Aoyagi, Katsuhiro*; Takada, Hiroshi

no journal, , 

13 (Records 1-13 displayed on this page)
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