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JAEA Reports

Treatment of waste oil with steam reforming system 2018

Sakashita, Koichi; Ishii, Naoyuki; Kijima, Jun; Aoyagi, Yoshitaka; Hagiwara, Masayoshi; Fukushima, Mineo

JAEA-Testing 2020-003, 20 Pages, 2020/07

JAEA-Testing-2020-003.pdf:1.52MB

Steam reforming method has been developed for the treatment of organic wastes which are not suitable materials (halogenated oil) for the incineration. This method consists of the gasification process in which organics are vaporized and decomposed with superheated steam and the oxidation process in which vaporized organics are decomposed by oxidizing reaction with heated air. In the gasification process, nonvolatile radionuclides are separated from vaporized waste. Therefore it can be expected that treatment of liquid waste generated from an off-gas treatment system and maintenance operation of the off-gas treatment system become easy to perform. 1,500L of waste oil contaminated with halogen, solvent and uranium was treated using the demonstration scale steam reforming system to examine the performance of the system in 2018. Results obtained this study were as follows; (1) The temperature in the steam reforming system was controlled under the self-regulation temperature. (2) The concentration of CO and NO$$_{X}$$ in the off-gas were controlled less than 100 ppm and 250 ppm respectively. (3) The gasification ratio of waste oil was more than 99%. (4) Concentration of fluorine oil in waste oil is needed to be less than 20wt% to perform stable continuance treatment.

Journal Articles

Fabrication of nanowires by varying energy microbeam lithography using heavy ions at the TIARA

Kamiya, Tomihiro; Takano, Katsuyoshi; Ishii, Yasuyuki; Sato, Takahiro; Oikawa, Masakazu*; Okubo, Takeru; Haga, Junji*; Nishikawa, Hiroyuki*; Furuta, Yusuke*; Uchiya, Naoyuki*; et al.

Nuclear Instruments and Methods in Physics Research B, 267(12-13), p.2317 - 2320, 2009/06

 Times Cited Count:7 Percentile:47.04(Instruments & Instrumentation)

Journal Articles

Development of micromachining technology in ion microbeam system at TIARA, JAEA

Kamiya, Tomihiro; Nishikawa, Hiroyuki*; Sato, Takahiro; Haga, Junji; Oikawa, Masakazu*; Ishii, Yasuyuki; Okubo, Takeru; Uchiya, Naoyuki; Furuta, Yusuke*

Applied Radiation and Isotopes, 67(3), p.488 - 491, 2009/03

 Times Cited Count:4 Percentile:30.43(Chemistry, Inorganic & Nuclear)

Development of a mask-less ion beam lithography technique for fabricating micro- or nano-meter sized structures has been started at the microbeam systems in the ion accelerator facility of JAEA Takasaki (TIARA) in collaboration with Shibaura Institute of Technology. In order to obtain a high precision measure for microbeam size estimation and lens system optimization, or for improvement of spatial resolution down to 100 nm level, we applied this lithography technique itself combined with the electroplating process to make a Ni relief pattern as an optimum resolution standard to be used in secondary electron imaging. In this work, using this standard, the smallest beam size could be obtained. This paper also discuses on the scattering of ions in the materials influenced to the resolution using a Monte Carlo simulation code.

Journal Articles

Ni electroplating on a resist micro-machined by proton beam writing

Uchiya, Naoyuki*; Furuta, Yusuke*; Nishikawa, Hiroyuki*; Watanabe, Toru*; Haga, Junji; Sato, Takahiro; Oikawa, Masakazu; Ishii, Yasuyuki; Kamiya, Tomihiro

Microsystem Technologies, 14(9-11), p.1537 - 1540, 2008/10

 Times Cited Count:17 Percentile:64.29(Engineering, Electrical & Electronic)

Oral presentation

Micro-machining of resist on silicon by proton beam writing

Uchiya, Naoyuki*; Harada, Takuya*; Nishikawa, Hiroyuki*; Haga, Junji; Sakai, Takuro; Sato, Takahiro; Ishii, Yasuyuki; Kamiya, Tomihiro

no journal, , 

no abstracts in English

Oral presentation

Micro-machining of resist materials using MeV proton microbeams

Uchiya, Naoyuki*; Harada, Takuya*; Murai, Masato*; Nishikawa, Hiroyuki*; Haga, Junji; Sato, Takahiro; Oikawa, Masakazu*; Sakai, Takuro; Ishii, Yasuyuki; Fukuda, Mitsuhiro*; et al.

no journal, , 

no abstracts in English

Oral presentation

Production of 3-D resit structures on silicon plates by a proton beam writing technique

Furuta, Yusuke*; Uchiya, Naoyuki*; Nishikawa, Hiroyuki*; Haga, Junji; Oikawa, Masakazu*; Sato, Takahiro; Ishii, Yasuyuki; Kamiya, Tomihiro

no journal, , 

no abstracts in English

Oral presentation

Micro-machining of resists by proton beam writing, 2; Fabrication of 3-D structures using a negative resist

Uchiya, Naoyuki; Furuta, Yusuke*; Nishikawa, Hiroyuki*; Haga, Junji; Sato, Takahiro; Oikawa, Masakazu*; Okubo, Takeru; Ishii, Yasuyuki; Kamiya, Tomihiro; Yamamoto, Shunya

no journal, , 

no abstracts in English

Oral presentation

Properties and distribution of radioactive caesium of the surface soil of Japanese cedar forest in Fukushima

Ishii, Yasuo; Sasaki, Yoshito; Kikuchi, Naoyuki; Watanabe, Takayoshi; Oda, Yoshihiro; Niizato, Tadafumi

no journal, , 

As part of "Long-Term Assessment of Transport of Radioactive Contaminant in the Environment of Fukushima" (F-TRACE project), JAEA have researched to expect the transportation of radioactive caesium from contaminated mountain forests to estuary and coast through dam, pond, river etc. based on survey data in Fukushima prefecture, and to implement technical information and remedial measures to prevent contamination of decontaminated areas and domestic water supply. In the forest area, it is considered that radioactive caesium existed in the tree canopies move to the surface of the ground through litter fall, through fall and stem flow. In this study, we report properties and distribution of radioactive caesium of the surface soils at stem base of Japanese cedar in the Ogi district of Kawauchi-mura to know the influence of the stem flow on soil.

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