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Journal Articles

How hot does the wall get?

Maki, Koichi*; Konno, Chikara

Nihon Genshiryoku Gakkai-Shi ATOMO$$Sigma$$, 50(10), p.649 - 653, 2008/10

Neutrons produced by the fusion reaction generate secondary neutrons and $$gamma$$-rays through interaction with materials of divertor, first wall and blanket. Target nuclei are recoiled by the interaction with these neutrons. At the micro level the recoiled nuclei disarray lattice arrangement and cause material damage if the recoil energy is larger than constraint energy of lattice. Here we will explain how the nuclear interactions change to heat and make radiation damage to materials.

Journal Articles

JENDL photonuclear data file

Kishida, Norio*; Murata, Toru*; Asami, Tetsuo*; Kosako, Kazuaki*; Maki, Koichi*; Harada, Hideo*; Lee, Y.*; Chang, J.*; Chiba, Satoshi; Fukahori, Tokio

AIP Conference Proceedings 769, p.199 - 202, 2005/05

Nuclear data for photonuclear reactions are required in the field of shielding design of high-energy electron accelerators and high-energy $$gamma$$-ray therapy. The JENDL Photonuclear Data File was prepared by a working group on nuclear data evaluations for photonuclear reactions in Japanese Nuclear Data Committee. From a survey of many literatures, it is difficult to construct the photonuclear data file by using only measured data, since there are not sufficient experimental data. We were therefore evaluating with theoretical calculations based on statistical nuclear reaction models. The photonuclear cross sections that are to be contained in the file are as follows: photoabsorption cross sections, yield cross sections and DDX for neutrons, protons, deuterons, tritons, $$^{3}$$He-particles and alpha-particles, and isotope production cross sections. For the actinide nuclides, photofission cross sections are also included. The maximum energy of incident photons is 140 MeV and stored are the photonuclear data for 68 nuclides from $$^{2}$$H to $$^{237}$$Np.

Journal Articles

Nuclear data evaluations for JENDL high-energy file

Watanabe, Yukinobu*; Fukahori, Tokio; Kosako, Kazuaki*; Shigyo, Nobuhiro*; Murata, Toru*; Yamano, Naoki*; Hino, Tetsushi*; Maki, Koichi*; Nakashima, Hiroshi; Odano, Naoteru*; et al.

AIP Conference Proceedings 769, p.326 - 331, 2005/05

An overview is presented of recent nuclear data evaluations performed for the JENDL high-energy (JENDL-HE) file, in which neutron and proton cross sections for energies up to 3 GeV are included for the whole 132 nuclides. The current version of the JENDL-HE file consists of neutron total cross sections, nucleon elastic scattering cross sections and angular distributions, nonelastic cross sections, production cross sections and double-differential cross sections of secondary light particles (${it n, p, d, t,}$ $$^{3}$$He, $$alpha$$, and $$pi$$) and $$gamma$$-rays, isotope production cross sections, and fission cross sections in the ENDF6 format. The present evaluations are performed on the basis of experimental data and theoretical model calculations. For the cross section calculations, we have constructed a hybrid calculation code system with some available nuclear model codes and systematics-based codes, such as ECIS96, OPTMAN, GNASH, JQMD, JAM, TOTELA, FISCAL, and so on. The evaluated cross sections are compared with available experimental data and the other evaluations. Future plans of our JENDL-HE project are discussed along with prospective needs of high-energy cross section data.

Journal Articles

Analytical representation for neutron streaming through slits in fusion reactor blanket by Monte Carlo calculation

Sato, Satoshi; Maki, Koichi*

Fusion Engineering and Design, 65(4), p.501 - 524, 2003/07

 Times Cited Count:7 Percentile:49.96(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Neutronics analysis of the ITER NB system; Nuclear responses of the components and shutdown dose around the NB injector

Shibata, Keiichiro*; Maki, Koichi*; Inoue, Takashi*; Hanada, Masaya; Okumura, Yoshikazu; Yamashita, Y.*

Fusion Engineering and Design, 51-52, p.357 - 362, 2000/11

 Times Cited Count:1 Percentile:12.1(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Effect of shielding design margin on the quantity of fusion reactor material

Maki, Koichi*; Konno, Chikara; Maekawa, Fujio; Maekawa, Hiroshi; *; *

Fusion Technology, 36(1), p.52 - 61, 1999/07

no abstracts in English

Journal Articles

2-D overall shielding analysis of ITER tokamak machine

Sato, Satoshi; Takatsu, Hideyuki; *; *; Iida, Hiromasa; R.Santoro*

Fusion Technology 1996, 0, p.1587 - 1590, 1997/00

no abstracts in English

Journal Articles

Evaluation of the environmental gamma-ray dose rate by skyshine analysis during the maintenance of an activated TFC in ITER

Sato, Satoshi; Takatsu, Hideyuki; *; *; Mori, Seiji*; Iida, Hiromasa; R.Santoro*

Journal of Fusion Energy, 16(3), p.211 - 218, 1997/00

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Shielding analysis for toroidal field coils around exhaust duct in fusion experimental reactors

Sato, Satoshi; Takatsu, Hideyuki; *; Seki, Yasushi

J. Fusion Eng. Des., 30(3), p.1076 - 1080, 1996/12

no abstracts in English

Journal Articles

Design analysis for reducing dose rate in the NBI to realize direct access by workers for a fusion experimental reactor

Inoue, Takashi; *; *; Yamashita, Y.*

Fusion Technology 1996, 0, p.1799 - 1802, 1996/00

no abstracts in English

Journal Articles

Nuclear design for fusion reactors

*; Seki, Yasushi; Sato, Satoshi; *

Purazuma, Kaku Yugo Gakkai-Shi, 71(10), p.987 - 1001, 1995/10

no abstracts in English

Journal Articles

Analyses for passive safety of fusion reactor during Ex-vessel loss of coolant accident

Honda, Takuro*; *; *; *; Seki, Yasushi; Aoki, Isao; Kunugi, Tomoaki

Journal of Nuclear Science and Technology, 32(4), p.265 - 274, 1995/04

 Times Cited Count:8 Percentile:63.17(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Design study on a 1MeV, 12.5MW neutral beam injector module for ITER

Okumura, Yoshikazu; Hanada, Masaya; Inoue, Takashi; *; *; Miyamoto, Kenji; Ohara, Yoshihiro; Watanabe, Kazuhiro; S.Zimin*

JAERI-Tech 95-018, 104 Pages, 1995/03

JAERI-Tech-95-018.pdf:2.72MB

no abstracts in English

Journal Articles

Pre-evaluation of fusion shielding benchmark experiment

*; *; Konno, Chikara; Maekawa, Fujio; Maekawa, Hiroshi; *; *; *

Fusion Engineering and Design, 28, p.525 - 533, 1995/00

no abstracts in English

JAEA Reports

Shielding analysis of the ITER/EDA NBI duct

S.Zimin*; *; Takatsu, Hideyuki; Sato, Satoshi; Tsunematsu, Toshihide; Inoue, Takashi; Ohara, Yoshihiro

JAERI-Tech 94-015, 37 Pages, 1994/08

JAERI-Tech-94-015.pdf:0.92MB

no abstracts in English

Journal Articles

Evaluation of radiation streaming through the annular gaps around divertor cooling pipes in fusion experimental reactors

Sato, Satoshi; *; Seki, Yasushi; Takatsu, Hideyuki; Mori, Seiji*

Proc. of the 8th Int. Conf. on Radiation Shielding, 0, p.1039 - 1046, 1994/00

no abstracts in English

Journal Articles

Evaluation of skyshine dose rate due to gamma-rays from activated cooling water in fusion experimental reactors

Sato, Satoshi; *; Seki, Yasushi; Takatsu, Hideyuki; Mori, Seiji*

Proc. of the 8th Int. Conf. on Radiation Shielding, 0, p.946 - 953, 1994/00

no abstracts in English

JAEA Reports

Two-dimensional over-all neutronics analysis of the ITER device

S.Zimin*; Takatsu, Hideyuki; Mori, Seiji*; *; Seki, Yasushi; Sato, Satoshi; Tada, Eisuke

JAERI-M 93-141, 75 Pages, 1993/07

JAERI-M-93-141.pdf:2.22MB

no abstracts in English

JAEA Reports

Streaming through the gaps around divertor pipings in ITER

Sato, Satoshi; *; Seki, Yasushi; Takatsu, Hideyuki; Mori, Seiji*; Kuroda, Toshimasa*; S.Zimin*

JAERI-M 93-093, 29 Pages, 1993/03

JAERI-M-93-093.pdf:0.86MB

no abstracts in English

46 (Records 1-20 displayed on this page)