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JAEA Reports

Manufacture of substitutive assemblies for MONJU reactor decommissioning

Sakakibara, Hiroshi; Aoki, Nobuhiro; Muto, Masahiro; Otabe, Jun; Takahashi, Kenji*; Fujita, Naoyuki*; Hiyama, Kazuhiko*; Suzuki, Hirokazu*; Kamogawa, Toshiyuki*; Yokosuka, Toru*; et al.

JAEA-Technology 2020-020, 73 Pages, 2021/03

JAEA-Technology-2020-020.pdf:8.26MB

The decommissioning is currently in progress at the prototype fast breeder reactor Monju. Fuel assemblies will be taken out of its core for the first step of the great task. Fuel assemblies stand on their own spike plugged into a socket on the core support plate and support with adjacent assemblies through their housing pads each other, resulting in steady core structure. For this reason, some substitutive assemblies are necessary for the purpose of discharging the fuel assemblies of the core. Monju side commissioned, therefore, Plutonium Fuel Development Center to manufacture the substitutive assemblies and the Center accepted it. This report gives descriptions of design, manufacture, and shipment in regard to the substitutive assemblies.

Journal Articles

Acceleration of high current fully stripped carbon ion beam by direct injection scheme

Kashiwagi, Hirotsugu; Fukuda, Mitsuhiro; Okamura, Masahiro*; Jameson, R. A.*; Hattori, Toshiyuki*; Hayashizaki, Noriyosu*; Sakakibara, Kazuhiko*; Takano, Jumpei*; Yamamoto, Kazuo*; Iwata, Yoshiyuki*; et al.

Review of Scientific Instruments, 77(3), p.03B305_1 - 03B305_4, 2006/03

 Times Cited Count:12 Percentile:54.47(Instruments & Instrumentation)

Acceleration of a 17mA 100keV/u C$$^{6+}$$ ion beam has been successfully achieved with an RFQ linac by means of "Direct injection scheme". The Direct injection scheme is a new scheme for injecting an ion beam from a laser ion source to the RFQ linac without a low energy beam transport line to avoid a beam loss due to the space charge effect. The high current C$$^{6+}$$ beam is required for single turn injection to a synchrotron to reduce the size of synchrotron magnets. The high current C$$^{6+}$$ beam produced by an ion source with a Nd-YAG laser was injected to the RFQ linac by the Direct injection scheme. It has been proved experimentally that the fully-stripped carbon ion beam with a current more than 10mA can be accelerated by the RFQ linac.

Journal Articles

High current carbon beam production with direct plasma injection scheme

Okamura, Masahiro*; Kashiwagi, Hirotsugu; Sakakibara, Kazuhiko*; Takano, Jumpei*; Hattori, Toshiyuki*; Hayashizaki, Noriyosu*; Jameson, R. A.*; Yamamoto, Kazuo*

Review of Scientific Instruments, 77(3), p.03B303_1 - 03B303_3, 2006/03

 Times Cited Count:10 Percentile:49.28(Instruments & Instrumentation)

We have been studying a new heavy-ion production technique called "direct plasma injection scheme", DPIS, since 2000. A new radio frequency quadrupole "RFQ" designed especially for the DPIS was commissioned in 2004 and very intense carbon beam was successfully obtained, reaching more than 60 mA accelerated current from the RFQ. Most of the contents of the accelerated beam was carbon 4+ as verified by beam analysis.

Journal Articles

Analysis of laser-produced heavy ions for direct plasma injection scheme

Sakakibara, Kazuhiko*; Okamura, Masahiro*; Kondrashev, S.*; Hattori, Toshiyuki*; Kashiwagi, Hirotsugu; Kanesue, Takeshi*

Review of Scientific Instruments, 77(3), p.03B304_1 - 03B304_3, 2006/03

 Times Cited Count:2 Percentile:15.45(Instruments & Instrumentation)

To accelerate highly charged intense ion beam, we have developed the direct plasma injectionscheme DPIS with laser ion source. In this scheme an ion beam from a laser ion source is injecteddirectly to a radio frequency quadrupole RFQ linac without a low energy beam transport LEBT line and then beam losses in the LEBT can be avoided. We achieved high current acceleration ofcarbon ions 60 mA by DPIS with the RFQ specially designed for high current heavy ions. As thenext step we will use heavier elements such as Al, Fe, and Ta as targets in laser ion source usinghigh power laser, for example, glass laser for DPIS and will examine properties of laser-producedplasma for highly charged ion production.

Journal Articles

Acceleration of high current and highly charged carbon beam using direct injection scheme

Kashiwagi, Hirotsugu; Okamura, Masahiro*; Jameson, R. A.*; Hattori, Toshiyuki*; Hayashizaki, Noriyosu*; Sakakibara, Kazuhiko*; Takano, Jumpei*; Yamamoto, Kazuo*; Iwata, Yoshiyuki*; Fujimoto, Tetsuya*

Proceedings of 2nd Annual Meeting of Particle Accelerator Society of Japan and 30th Linear Accelerator Meeting in Japan, p.182 - 184, 2005/07

The carbon beam from a Nd-YAG laser ion source was accelerated successfully by an RFQ linac using Direct injection scheme. The "Direct injection scheme" is the way to inject an ion beam to the RFQ linac without a low energy beam transport line to avoid space charge effect due to a high intensity beam from the laser ion source. About 30mA of a carbon beam was detected by a faraday cup just behind the RFQ linac.

Journal Articles

Investigation of Radioactive Inventory in the TRU Solid Wastes Generated from the Tokai Reprocessing Plant

Sakakibara, Tetsuro; Tsutomu, Tanabe,; Takahashi, Kuniaki; Akutsu, Shigeru; Kojima, Hiroshi; Sakashita, Akira*; Kuroda, Kazuhiko*

Proceedings of International Waste Management Symposium 2005 (WM 2005), 0 Pages, 2005/00

Focusing on the cover layer materials (as the Radon Barrier Materials), which could have the effect to restrain the radon from scattering into the air and the effect of the radiation shielding, we produced the radon barrier materials with crude bentonite on an experimental basis, using the rotary type comprehensive unit for grinding and mixing, through which we carried out the evaluation of the characteristics thereof.

Journal Articles

Biodegradable poly(DL-lactic acid) formulations in a calcitonin delivery system

Asano, Masaharu; Yoshida, Masaru; Omichi, Hideki; Mashimo, Toru*; Okabe, Kazuhiko*; Yuasa, Hisako*; Yamanaka, Hidetoshi*; Morimoto, Seiki*; Sakakibara, Hideo*

Biomaterials, 14(10), p.797 - 799, 1993/08

no abstracts in English

Journal Articles

Biodegradable poly(DL-lactic acid) formulations in a calcitonin delivery system

Asano, Masaharu; Yoshida, Masaru; Omichi, Hideki; Mashimo, Toru*; Okabe, Kazuhiko*; Yuasa, Hisako*; Yamanaka, Hidetoshi*; *; Sakakibara, Hideo*

Biomaterials, 14(10), p.797 - 799, 1993/00

 Times Cited Count:22 Percentile:73.33(Engineering, Biomedical)

no abstracts in English

Oral presentation

Evaluation of radioactivity in wastes from Tokai reprocessing plant, 4; Correlation between Tc-99 and Cs-137, 1

Sakakibara, Tetsuro; Kohanawa, Osamu; Akutsu, Shigeru; Kojima, Hiroshi; Sakashita, Akira*; Kuroda, Kazuhiko*; Kino, Kenichiro*; Saigusa, Moriyuki*

no journal, , 

no abstracts in English

Oral presentation

Evaluation of radioactivity in wastes from Tokai reprocessing plant, 5; Correlation between activation products and Co-60, 1

Kino, Kenichiro*; Saigusa, Moriyuki*; Sakashita, Akira*; Kuroda, Kazuhiko*; Sakakibara, Tetsuro; Kohanawa, Osamu; Akutsu, Shigeru; Kojima, Hiroshi

no journal, , 

no abstracts in English

Oral presentation

Design and manufacture of substitutive assemblies for MONJU reactor decommissioning

Sakakibara, Hiroshi; Aoki, Nobuhiro; Muto, Masahiro; Otabe, Jun; Takahashi, Kenji*; Fujita, Naoyuki*; Hiyama, Kazuhiko*; Suzuki, Hirokazu*; Kamogawa, Toshiyuki*; Yokosuka, Toru*; et al.

no journal, , 

no abstracts in English

11 (Records 1-11 displayed on this page)
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