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Hirooka, Shun; Okumura, Kazuyuki; Makino, Takayoshi
no journal, ,
no abstracts in English
Nishina, Masahiro; Takato, Kiyoto; Nakamichi, Shinya; Segawa, Tomoomi; Kawaguchi, Koichi; Ishii, Katsunori; Makino, Takayoshi; Okumura, Kazuyuki
no journal, ,
no abstracts in English
Hirooka, Shun; Horii, Yuta; Segawa, Tomoomi; Kawaguchi, Koichi; Ishii, Katsunori; Makino, Takayoshi; Okumura, Kazuyuki
no journal, ,
no abstracts in English
Horii, Yuta; Hirooka, Shun; Kato, Masato; Uno, Hiroki*; Ogasawara, Masahiro*; Tamura, Tetsuya*; Yamada, Tadahisa*; Okumura, Kazuyuki
no journal, ,
As part of studies on physical properties of low-decontaminated fuel pellets, simulated FPs (Sm
O
and NdO) and impurities included at such as fuel fabrication process (AlO and SiO) were added to MOX, and their effects on thermal conductivity were evaluated. Addition of SmO and NdO in MOX, that can be solutionized, decreased thermal conductivity whereas addition of AlO and SiO, that don't make a solid solution with MOX, increased thermal conductivity.
Takato, Kiyoto; Nishina, Masahiro; Tsuchimochi, Ryota; Hayashizaki, Kohei; Segawa, Tomoomi; Kawaguchi, Koichi; Ishii, Katsunori; Makino, Takayoshi; Okumura, Kazuyuki
no journal, ,
no abstracts in English
Nakamichi, Shinya; Sunaoshi, Takeo*; Uno, Hiroki*; Yamada, Tadahisa*; Okumura, Kazuyuki
no journal, ,
no abstracts in English
Segawa, Tomoomi; Kawaguchi, Koichi; Ishii, Katsunori; Yamamoto, Kazuya; Makino, Takayoshi; Okumura, Kazuyuki
no journal, ,
In previous studies, although a tendency for voids to form around dry recovered powder particles has been observed from the metallography of sintered pellets, it has been difficult to completely distinguish the areas derived from dry recovered powder particles from those derived from raw powder. In this study, for the purpose of clarifying the mechanism of the control of the pellet sintering density by dry recovered powder, and to identify the area in the sintered pellets derived from simulated dry recovered powder, (Ce,Zr)O sintered pellets with zirconium oxide (ZrO) added as a tracer in CeO was milled and particle size adjusted to obtain (Ce,Zr)O simulated dry recovered powder was used as a parameter for the particle size distribution and the mixing ratio of CeO raw powder and simulated dry recovered powder to form and sintered pellets, and the microstructure of the pellets was evaluated.
Goto, Kenta; Hirooka, Shun; Horii, Yuta; Nakamichi, Shinya; Murakami, Tatsutoshi; Shibanuma, Kimikazu; Ono, Takanori; Yamamoto, Kazuya; Hatanaka, Nobuhiro; Okumura, Kazuyuki
no journal, ,
no abstracts in English
Segawa, Tomoomi; Takashima, Hayato; Yamamoto, Kazuya; Ono, Takanori; Okumura, Kazuyuki; Kawaguchi, Koichi; Ishii, Katsunori
no journal, ,
In the pulverizing process of dry recycled powder on a mass production scale, pulverizing equipment with a classifying function is required to efficiently obtain a dry recycled powder that does not contain particles with excessive particle diameters. Since the maximum particle diameter tends to increase as the feed rate of raw material powder increases, focusing on the classification method, pulverization tests were performed on a mass production scale using collision plate-type jet mill and spiral jet mill with a classifying function. The results of these tests showed that the tendency of the maximum particle diameter to increase with increasing feed rate of the simulated raw material powders was different for each of the jet mill. This is considered to be attributable to differences in the characteristics of the classifying function of each mill.