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Ishitsuka, Etsuo; Sakamoto, Naoki*
Physical Sciences and Technology, 6(2), p.60 - 63, 2019/12
Tritium release into the primary coolant of the research and test reactors during operation had been studied, and it is found that the recoil release from chain reaction of 
Be is dominant. To reduce tritium concentration of the primary coolant, feasibility study of the tritium recoil barrier for the beryllium neutron reflectors was carried out, and the tritium recoils of various materials were calculated by PHITS. From these calculation results, it is clear that the thickness of tritium recoil barrier depends on the material and 20
40 
m is required for three orders reduction.
Ishitsuka, Etsuo; Kenzhina, I.*; Okumura, Keisuke; Ho, H. Q.; Takemoto, Noriyuki; Chikhray, Y.*
JAEA-Technology 2018-010, 33 Pages, 2018/11
JAEA-Technology-2018-010.pdf:2.58MB
As a part of study on the mechanism of tritium release to the primary coolant in research and testing reactors, tritium recoil release rate from Li and U impurities in the neutron reflector made by beryllium, aluminum and graphite were calculated by PHITS code. On the other hand, the tritium production from Li and U impurities in beryllium neutron reflectors for JMTR and JRR-3M were calculated by MCNP6 and ORIGEN2 code. By using both results, the amount of recoiled tritium from beryllium neutron reflectors were estimated. It is clear that the amount of recoiled tritium from Li and U impurities in beryllium neutron reflectors are negligible, and 2 and 5 orders smaller than that from beryllium itself, respectively.
Nishitani, Takeo; Vayakis, G.*; Yamauchi, Michinori*; Sugie, Tatsuo; Kondoh, Takashi; Shikama, Tatsuo*; Ishitsuka, Etsuo; Kawashima, Hisato
Journal of Nuclear Materials, 329-333(Part2), p.1461 - 1465, 2004/08
Times Cited Count：16 Percentile：69.80(Materials Science, Multidisciplinary)no abstracts in English
Tamai, Hiroshi; Kurita, Genichi; Matsukawa, Makoto; Urata, Kazuhiro*; Sakurai, Shinji; Tsuchiya, Katsuhiko; Morioka, Atsuhiko; Miura, Yushi; Kizu, Kaname; Kamada, Yutaka; et al.
Plasma Science and Technology, 6(3), p.2281 - 2285, 2004/06
Times Cited Count：0 Percentile：0.02(Physics, Fluids & Plasmas)High performance steady-state operation for JT-60SC are evaluated by the TOPICS analysis. 
5 and bootstrap current fraction 86% is kept steady at I
=1.5 MA, B
=2 T by neutral beam power of 11 MW. The ERATO-J analysis shows that the external-kink mode with multiple toroidal mode numbers of n=1 and n=2 is stable at 
5.5 at the average ratio of conducting wall radius to plasma minor radius of about 1.2 with the wall stabilisation effect. Resistive wall modes, induced by a close location of the wall to plasma, is expected to be suppressed by the active feedback stabilisation with a set of non-axisymmetric field coils behind the stabilising plates. Further optimisation for the high- accessibility by the plasma shaping is performed with the TOSCA analysis. The plasma shaping factor defined as S=(I/aB)q
and strongly correlated to the plasma elongation and triangularity, is scanned from 4 to 6, which extends the availability of current and pressure profile control for the high performance plasma operation.
Kato, Takashi; Nakajima, Hideo; Isono, Takaaki; Hamada, Kazuya; Kawano, Katsumi; Sugimoto, Makoto; Nunoya, Yoshihiko; Koizumi, Norikiyo; Matsui, Kunihiro; Oshikiri, Masayuki*; et al.
Teion Kogaku, 36(6), p.315 - 323, 2001/06
no abstracts in English
Ninomiya, Akira*; Arai, Kazuaki*; Takano, Katsutoshi*; Nakajima, Hideo; Michael, P.*; Martovetsky, N.*; Takahashi, Yoshikazu; Kato, Takashi; Ishigooka, Takeshi*; Kaiho, Katsuyuki*; et al.
Teion Kogaku, 36(6), p.344 - 353, 2001/06
no abstracts in English
Kato, Takashi
Tabo Kikai, 28(9), p.536 - 545, 2000/09
no abstracts in English
; Nakahira, Masataka; Takahashi, Hiroyuki*; Tada, Eisuke; ;
JAERI-Tech 99-026, 158 Pages, 1999/03
no abstracts in English
Nishitani, Takeo; ; Ikeda, Yujiro; Ishitsuka, Etsuo; Kakuta, Tsunemi; Kasai, Satoshi; Kawamura, Hiroshi; Morita, Yosuke; Nagashima, Akira; Nakamichi, Masaru; et al.
JAERI-Research 98-053, 105 Pages, 1998/10
JAERI-Research-98-053.pdf:4.78MB
no abstracts in English
Iwata, Tadao; Iwase, Akihiro
Radiat. Eff. Defect Solids, 144(1-4), p.27 - 61, 1998/00
no abstracts in English
Inagaki, Yoshiyuki
JAERI-Research 97-069, 31 Pages, 1997/10
JAERI-Research-97-069.pdf:1.02MB
no abstracts in English
Meigo, Shinichiro
Nuclear Instruments and Methods in Physics Research A, 401, p.365 - 378, 1997/00
Times Cited Count：60 Percentile：95.90(Instruments & Instrumentation)no abstracts in English
; ; Kato, Takashi; Kawano, Katsumi; Hiyama, Tadao; ; ; Otsu, K.*; ; Tsuji, Hiroshi
Cryogenics, 34(Suppl.), p.65 - 68, 1994/00
no abstracts in English
Wachi, Y.*; ; ; ; Fujioka, T.*; Nakajima, Hideo; Sugimoto, Makoto; Koizumi, Koichi; Yoshida, Kiyoshi; ; et al.
Cryogenics, 33(6), p.603 - 608, 1993/00
Times Cited Count：2 Percentile：17.81(Thermodynamics)no abstracts in English
Nishi, Masataka; Ando, Toshinari; Tsuji, Hiroshi; ; Hamajima, Takataro*; Fujioka, T.*
Teion Kogaku, 27(3), p.207 - 216, 1992/00
no abstracts in English
Wachi, Y.*; ; ; ; Fujioka, T.*; Nakajima, Hideo; Sugimoto, Makoto; Koizumi, Koichi; Yoshida, Kiyoshi; ; et al.
Teion Kogaku, 27(3), p.245 - 251, 1992/00
no abstracts in English
Sugimoto, Makoto; Kato, Takashi; Kawano, Katsumi; Hiyama, Tadao; ; ; ; ; ; Okuno, Kiyoshi; et al.
Teion Kogaku, 27(3), p.239 - 244, 1992/00
no abstracts in English
Koizumi, Koichi; Hasegawa, Mitsuru*; Yoshida, Kiyoshi
JAERI-M 91-121, 200 Pages, 1991/08
no abstracts in English
K.W.Lee*; ; ; ; ; ; Saeki, Masakatsu; Tachikawa, Enzo
J.Phys.Chem., 90, p.5343 - 5347, 1986/00
no abstracts in English
; Hiyama, Tadao; Kato, Takashi; ;
Teion Kogaku, 19(2), p.139 - 152, 1984/00
no abstracts in English
