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Shu, Wataru; Kawakubo, Yukio*; Luo, G.; Nishi, Masataka
Journal of Nuclear Science and Technology, 40(12), p.1019 - 1026, 2003/12
Times Cited Count:4 Percentile:31.58(Nuclear Science & Technology)Recovery of tritium from co-deposited layers is a crucial issue for fusion machines that use carbon as plasma facing materials. In this study, the removal rate of the JT-60 and TFTR co-deposited layers by KrF laser was measured for varying laser energy density. The removal rate of 5.0 m/pulse was achieved for the JT-60 co-deposited layers at the energy density of 11 J/cm for KrF excimer laser. Hydrogen (tritium) was released in the form of hydrogen molecules and readily recovered. The formation of cones due to local surface melting was observed at the KrF laser energy density of 0.8 J/cm, whereas strong melting was determined to be the mechanism of the ablative removal of the JT-60 co-deposited layers at the energy density greater than the ablation threshold.
JAERI-Review 97-004, 62 Pages, 1997/03
no abstracts in English
*; Ichinose, Yuji; Kawanishi, Shunichi; Nishii, Masanobu; Sasuga, Tsuneo; *; *
Chemistry of Materials, 9(12), p.2674 - 2675, 1997/00
Times Cited Count:18 Percentile:62.36(Chemistry, Physical)no abstracts in English
Ichinose, Yuji; *; Kawanishi, Shunichi; *; *
Langmuir, 13(10), p.2603 - 2605, 1997/00
Times Cited Count:8 Percentile:45.37(Chemistry, Multidisciplinary)no abstracts in English
Ichinose, Yuji; Kawanishi, Shunichi
Langmuir, 13(22), p.5805 - 5807, 1997/00
Times Cited Count:5 Percentile:76.07(Chemistry, Multidisciplinary)no abstracts in English
Shimizu, Yuichi; Sugimoto, Shunichi*; Kawanishi, Shunichi; Suzuki, Nobutake
Laser Chem., 17, p.97 - 108, 1997/00
no abstracts in English
Suzuki, Nobutake; Shimizu, Yuichi
Hoshasen Kagaku, 39(8), p.291 - 297, 1996/00
no abstracts in English
Suzuki, Nobutake; Kawanishi, Shunichi
Hoshasen Kagaku, 39(9), p.337 - 343, 1996/00
no abstracts in English
Ichinose, Yuji; Kawanishi, Shunichi
Macromolecules, 29, p.4155 - 4157, 1996/00
Times Cited Count:10 Percentile:44.68(Polymer Science)no abstracts in English
Kawanishi, Shunichi
Nyumon Jiyu Denshi Reza, 0, p.194 - 202, 1995/08
no abstracts in English
JAERI-Review 95-002, 62 Pages, 1995/03
no abstracts in English
*; Ichinose, Yuji; Kawanishi, Shunichi
Kobunshi Rombunshu, 52(1), p.66 - 68, 1995/01
Times Cited Count:3 Percentile:25.14(Polymer Science)no abstracts in English
Fukui, Yasutaka; ; Tanimoto, Kenichi; Terunuma, Seiichi
PNC TN9410 95-041, 171 Pages, 1994/12
As the material is irradiated by laser beam, its surface is instataneously heated and ablation. the contaminant in surface layer of radioactive wastes will be decontaminated, provided that such the physical phenomenon is used of decontamination technique. The applicability with decommissioning of laser decontamination technique are investigated by the research of the associated laser techniques and the removing test with metal surface. The results of the research and the test is as follows. (1)The research of laser decontamination. On the YAG and the eximer laser beam, there were some study reports of the decontamination, with the metal and the concrete. The structural material. the biological shield, and the waste strage vessel, these objects were regarded as the objects of the laser decontamination. (2)The removing test of the metal surfacc by lascr beam. The removing performance was examined by irradiating line forcused YAG laser beam with the stainless steel surface. The average removal depth rose, in proportion the product of the energy beam density and the number of beam pulse in He atomosphere. The removal depth was obtained more than 1m, in condition of the laser beam energy was 400mJ and the moving velocity of the test piece was 0.25mm/sec. About 65% of the ablation products were collected, by the simple absorbing system of the open type. (3)Future plan. It is necessary, Examining the removing performance and the variable property of the removal surface, investigating the decontamination technique of the large area and the collecting technique of the ablation products, and so. Thereafter the application to the decontamination will be studied.
Kawanishi, Shunichi
EMC: electro magnetic compatibility: solution technology: Denji Kankyo Kogaku Joho, 0(78), p.27 - 30, 1994/10
no abstracts in English
Shimizu, Yuichi
Radioisotopes, 43(3), p.147 - 156, 1994/03
no abstracts in English
Nishii, Masanobu; Sugimoto, Shunichi*; Shimizu, Yuichi; Suzuki, Nobutake; *; *; *
Chemistry Letters, 1993, p.1063 - 1066, 1993/00
no abstracts in English
*; *; Shimizu, Yuichi; Sugimoto, Shunichi*; Nishii, Masanobu; Kawanishi, Shunichi
Chemistry Letters, 1993, p.1637 - 1638, 1993/00
no abstracts in English
*; Kawanishi, Shunichi; Nishii, Masanobu; Shimizu, Yuichi; Sugimoto, Shunichi; *; *
J. Photopolym. Sci. Technol., 6(3), p.385 - 392, 1993/00
no abstracts in English
Nishii, Masanobu; Sugimoto, Shunichi*; Shimizu, Yuichi; Suzuki, Nobutake; *; *; *
Chemistry Letters, 1992, p.2089 - 2090, 1992/00
no abstracts in English