High-power tests of RF input coupler for the IFMIF/EVEDA RFQ prototype linac

Maebara, Sunao; Sukegawa, Keiichi*; Tadano, Shuya*; Kasugai, Atsushi; Suzuki, Hiromitsu; Abe, Kazuhiko*; Oku, Ryuji*; Sugimoto, Masayoshi

Proceedings of 12th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.1140 - 1142, 2015/09

http://www.pasj.jp/web_publish/pasj2015/proceedings/PDF/THP0/THP065.pdf

For the IFMIF/EVEDA accelerator prototype RFQ linac, the operation frequency of 175MHz was selected to accelerate a large current of 125mA. The driving RF power of 1.28MW by 8 RF input couplers has to be injected to the RFQ cavity for CW operation mode. For each RF input coupler, nominal RF power of 160kW and maximum transmitted RF power of 200kW are required. For this purpose, an RF input coupler with cooling functions was designed, based on a 6 1/8 inch co-axial waveguide, and the RF coupler was manufactured by way of trial. For the trial RF coupler, high-power tests using a high voltage standing wave on a high-Q load circuit wave were carried out, and a 200kW-14 sec CW operation were performed after four days of RF aging. No RF contact defects, unnecessary low-Q value and extraordinary outgassing were observed. This report describes the high-power tests of the RF input coupler.

Radiological characterisation of LLW arising from JAERI Tokai Research Establishment

Okoshi, Minoru; Sakai, Akihiro; Abe, Masayoshi; Tanaka, Mitsugu

IAEA-CN-87/50 (CD-ROM), p.113 - 118, 2002/12

As the result of research activities for nuclear energy utilization over 45 years, large amounts of low-level radioactive waste (LLW) are stored at Tokai Research Establishment of JAERI. In order to plan the disposal program, JAERI carried out the radiological characterization of the waste. The results show that about 34,400 tons of LLW will arise from the operation and dismantling of the facilities by the end of 2045. The total activities of beta- and gamma-radionuclides and alpha-radionuclides are about 44 PBq and 56 TBq, respectively. By using the estimated total weight and radioactivities of the waste, important radionuclides were selected from the viewpoint of safety according to the performance assessment of near surface disposal facilities. As the results, twenty-seven radionuclides including twelve alpha-ray emitting actinides were selected as the candidate important radionuclides. Those are slightly different from important radionuclides selected for commercial nuclear power plants because of materials used for facilities and so on.

Development of database on the distribution coefficient, 2; Preparation of database

Takebe, Shinichi; Abe, Masayoshi

JAERI-Data/Code 2001-006, 96 Pages, 2001/03

JAERI-Data-Code-2001-006.pdf:5.96MB

no abstracts in English

Selection of important nuclides from the viewpoint of safety assessment for disposal of radioactive waste arising from research institute, 1; Evaluation of nuclide composition rates in waste generated from main research facilities

Sakai, Akihiro; Yoshimori, Michiro; Abe, Masayoshi

JAERI-Tech 2000-012, p.107 - 0, 2000/03

JAERI-Tech-2000-012.pdf:6.47MB

no abstracts in English

Overview and present status of the IAEA/RADWASS programme

Abe, Masayoshi

Dekomisshoningu Giho, (18), p.2 - 16, 1998/08

http://www.randec.or.jp/publish/documents/gihou/Decommissioning%20gihou_18.pdf

no abstracts in English

Near surface disposal of very low level waste generated from reactor decommissioning and related safety requirements

Okoshi, Minoru; Yoshimori, Michiro; Abe, Masayoshi

Planning and Operation of Low Level Waste Disposal Facilities IAEA-SM-341/70, 0(0), p.416 - 425, 1997/00

no abstracts in English

Safety demonstration test for the disposal of very low level concrete waste

Abe, Masayoshi; Okoshi, Minoru; Yoshimori, Michiro

Dekomisshoningu Giho, 0(15), p.50 - 58, 1996/12

http://www.randec.or.jp/publish/documents/gihou/Decommissioning%20gihou_15.pdf

no abstracts in English

Low level combustible waste management system of JAERI-OARAI

; ; Abe, Masayoshi

Hoken Butsuri, 26, p.47 - 58, 1991/00

https://doi.org/10.5453/jhps.26.47

no abstracts in English

Test Operation Results of Radioactive Solid Waste Incinerator

; ; ; ;

JAERI-M 9457, 41 Pages, 1981/04

JAERI-M-9457.pdf:2.09MB

no abstracts in English