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Nakamura, Mizuki; Izumo, Sari; Ogawa, Rina; Nakata, Hisakazu; Amazawa, Hiroya; Sakai, Akihiro
JAEA-Technology 2022-025, 73 Pages, 2022/12
JAEA-Technology-2022-025.pdf:1.64MB
Japan Atomic Energy Agency (JAEA) has been establishing as the implementing body of the near surface disposal of low-level radioactive waste (LLW) generated from research facilities and other facilities in order to actualize the near surface disposal. It is necessary to evaluate the effective doses by direct and skyshine 
-rays from disposal facilities and reduce the doses below the target dose (50
Sv/y) at the site boundary for the safety assessment during operation. It was shown at the results of conceptual design that the distance from the trench disposal facilities to site boundary needed to be kept more than 120m in order to satisfy the target dose. However, the design of trench disposal facilities was changed because of increasing amount of waste subject to the trench disposal. Therefore, the dose by skyshine -rays from trench disposal facilities was recalculated by use of two-dimensional discrete ordinates Sn code DOT 3.5. As a result, it was evaluated that the dose by skyshine -rays from each trench facility at the site boundary whose distance was 120m from a trench facility was lower than 50 Sv/y, respectively, and the dose added up the doses from trench facilities was also lower than 50 Sv/y. In addition, it was suggested to reduce the target skyshine dose by thickening the covered soil on the top layer.
Kasahara, Shigeki; Kitsunai, Yuji*; Chimi, Yasuhiro; Chatani, Kazuhiro*; Koshiishi, Masato*; Nishiyama, Yutaka
Journal of Nuclear Materials, 480, p.386 - 392, 2016/11
Times Cited Count：0 Percentile：0.01(Materials Science, Multidisciplinary)This paper addresses influence of two different temperature profiles during startup periods in the Japan Materials Testing Reactor and a boiling water reactor upon microstructural evolution and mechanical properties of austenitic stainless steel irradiated with neutrons to about 1 dpa and 3 dpa. Tensile tests at 290
C and Vickers hardness tests at room temperature were carried out, and their microstructures were observed by FEG-TEM. Influence of difference in the temperature profiles was observed obviously in interstitial cluster formation, in particular, growth of Frank loops. The influence was also found certainly in loss of strain hardening capacity and ductility, although the influence on the yield strength and the Vickers hardness was not clearly observed. As a result, Frank loops, which were observed in austenitic stainless steel irradiated at doses of 1 dpa or more, were considered to contribute to deformation of the austenitic stainless steel.
Xu, Y.; Narumi, Kazumasa; Miyashita, Kiyoshi*; Naramoto, Hiroshi
Surface and Interface Analysis, 35(1), p.99 - 103, 2003/01
Times Cited Count：9 Percentile：25.16(Chemistry, Physical)no abstracts in English
Morioka, Atsuhiko; Sakasai, Akira; Masaki, Kei; Ishida, Shinichi; Miya, Naoyuki; Matsukawa, Makoto; Kaminaga, Atsushi; Oikawa, Akira
Fusion Engineering and Design, 63-64, p.115 - 120, 2002/12
Times Cited Count：12 Percentile：60.73(Nuclear Science & Technology)no abstracts in English
The Ad Hoc Committee for Evaluation of R&D Achievements
JAERI-Review 2002-019, 139 Pages, 2002/08
JAERI-Review-2002-019.pdf:13.42MB
no abstracts in English
*; Takemura, Morio*
JNC TJ9440 2000-005, 157 Pages, 2000/03
With use of the two-dimensional discrete ordinates code DORT and the standard groupwise shielding design library JSSTDL produced from the latest evaluated nuclear data library JENDL-3.2, experimental analyses for the representative configurations in the Radial Shield Attenuation Experiment of the JASPER were performed. The results were compared with those obtained with use of traditional method DOT3.5/JSDJ2 for the previous JASPER experimetal analyses. In general, the change of the cross section library gives higher results and the change of the transport code gives lower results. Finally the new analysis method gives better agreement with the experimental results and also less deviations of calculational errors between various detectors. Experimental analyses for the thick concrete configulation in the Gap Streaming Experiment of the JASPER was also performed with the new analysis method, after solving the poor agreement found in last year with the original JASPER experimental analyses. The same tendency due to the library change was confirmed with the above mentioned analyses of the Radial Shield Attenuation Experiment. Compilation of the input data necessary for future reanalyses of important configurations in JASPER experiments were continued through the above-mentioned experimental analyses and related informations were added for repletion of the database preserved in a computer disk holding previously accumulated data. Input data descriptions were made for auxiliary routines needed for the experimental analyses and their sample data were compiled and stored in the database.
Huang, Z.*; Ohashi, Hirofumi; Inagaki, Yoshiyuki
JAERI-Tech 2000-022, p.30 - 0, 2000/03
JAERI-Tech-2000-022.pdf:1.24MB
no abstracts in English
Tsubosaka, Akira; Nomura, Yasushi; Kawabe, Toshiaki*; Zharkov, V. P.*; Kartashev, I. A.*; Netecha, M. E.*; Orlov, Y. V.*
Journal of Nuclear Science and Technology, 37(Suppl.1), p.610 - 615, 2000/03
no abstracts in English
Iwashita, Mitsushige*; Arigane, Kenji; Kishimoto, Katsumi; Seiki, Y.*; Fukumura, Nobuo*; Mio, K.*
Journal of Nuclear Science and Technology, 37(Suppl.1), p.372 - 378, 2000/03
no abstracts in English
/activation and 3-D Monte Carlo analysesSato, Satoshi; Iida, Hiromasa; Plenteda, R.*; Valenza, D.*; Santoro, R. T.*
Fusion Engineering and Design, 47(4), p.425 - 435, 2000/01
Times Cited Count：9 Percentile：54.09(Nuclear Science & Technology)no abstracts in English
Sato, Satoshi; Takatsu, Hideyuki; Seki, Yasushi; *; *; Iida, Hiromasa; Plenteda, R.*; Santoro, R. T.*; Valenza, D.*; Ohara, Yoshihiro; et al.
Fusion Technology, 34(3), p.1002 - 1007, 1998/11
no abstracts in English
*; Ishida, Toshihisa; *
JAERI-Tech 98-030, 38 Pages, 1998/08
no abstracts in English
Sato, Satoshi; Takatsu, Hideyuki; *; Iida, Hiromasa; Mori, Seiji*; R.Santoro*
Fusion Engineering and Design, 42, p.213 - 219, 1998/00
Times Cited Count：1 Percentile：15.02(Nuclear Science & Technology)no abstracts in English
Konno, Chikara; Maekawa, Fujio; Oyama, Yukio; Wada, Masayuki*; Ikeda, Yujiro; Maekawa, Hiroshi; Kasugai, Yoshimi; M.Z.Youssef*; A.Kumar*; M.A.Abdou*
Fusion Engineering and Design, 42, p.267 - 273, 1998/00
Times Cited Count：2 Percentile：24.46(Nuclear Science & Technology)no abstracts in English
Maekawa, Fujio; Konno, Chikara; Oyama, Yukio; Ikeda, Yujiro; Wada, Masayuki*; Uno, Yoshitomo; Y.M.Verzilov*; Maekawa, Hiroshi
Fusion Technology, 30(3(PT.2B)), p.1081 - 1087, 1996/12
no abstracts in English
Sato, Satoshi; Takatsu, Hideyuki; *; Seki, Yasushi
J. Fusion Eng. Des., 30(3), p.1076 - 1080, 1996/12
no abstracts in English
; Nakao, Noriaki*; Tanaka, Shunichi; Nakamura, Takashi*; Shin, Kazuo*; Tanaka, Susumu; Takada, Hiroshi; Meigo, Shinichiro; Nakane, Yoshihiro; Sakamoto, Yukio; et al.
Nuclear Science and Engineering, 124(2), p.243 - 257, 1996/00
Times Cited Count：41 Percentile：94.19(Nuclear Science & Technology)no abstracts in English
Konno, Chikara; Oyama, Yukio; Ikeda, Yujiro; ; ; Kosako, Kazuaki*; Maekawa, Hiroshi; Nakakawa, Masayuki; Mori, Takamasa; Nakamura, Tomoo; et al.
Fusion Technology, 28(2), p.273 - 295, 1995/09
no abstracts in English
Maekawa, Fujio; Konno, Chikara; Wada, Masayuki*; Oyama, Yukio; Ikeda, Yujiro; Uno, Yoshitomo; Verzilov, Y.*; Maekawa, Hiroshi
JAERI-Research 95-018, 112 Pages, 1995/03
JAERI-Research-95-018.pdf:4.45MB
no abstracts in English
Konno, Chikara; Maekawa, Fujio; Oyama, Yukio; Ikeda, Yujiro; Maekawa, Hiroshi
Fusion Engineering and Design, 28, p.745 - 752, 1995/00
no abstracts in English
