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Kanno, Ikuo
no journal, ,
no abstracts in English
Kawabata, Kuniaki; Okada, Satoshi*; Yoshimi, Takashi*
no journal, ,
Hiraki, Yoshihisa; Sato, Junya; Chaerun, R. I.; Niu, X.*; Elakneswaran, Y.*; Yoshida, Yukihiko; Osugi, Takeshi
no journal, ,
Taniguchi, Takumi; Kuramochi, Ryo*; Hiraki, Yoshihisa; Shimizu, Koki; Osawa, Norihisa*; Kaneda, Yoshihisa*; Yoshida, Yukihiko; Osugi, Takeshi
no journal, ,
Tatsuno, Takahiro*; Nihei, Naoto*; Yoshimura, Kazuya; Ote, Nobuhito*
no journal, ,
Tatsuno, Takahiro*; Nihei, Naoto*; Yoshimura, Kazuya
no journal, ,
Nishimura, Akihiko; Ide, Tsugio*; Ishihara, Nobuyuki*
no journal, ,
The technologies surrounding the 1F decommissioning work are gradually forming a network with various industrial fields. Here, we report on the technical collaboration related to remote strain measurement centered on Fiber Bragg Grating (FBG) sensing. Strain monitoring can be used for gripping force measurement of manipulators in case of handling fragile debris due to weathering effects. FBG sensing for pipeline maintenance and heat exchanger device are introduced.
Nishimura, Akihiko; Ide, Tsugio*; Ishihara, Nobuyuki*
no journal, ,
no abstracts in English
Sato, Yuki; Minemoto, Kojiro*; Nemoto, Makoto*
Proceedings of Waste Management Conference 2025 (WM2025) (Internet), 9 Pages, 2025/03
Terasaka, Yuta
no journal, ,
no abstracts in English
Terada, Atsuhiko; Nagaishi, Ryuji; Thwe Thwe, A.; Ito, Tatsuya
no journal, ,
In the Development of Technologies for Containing, Transportation and Storage of Fuel Debris, efforts have been made to develop methods for evaluating the amount of hydrogen (H) generated from lump-shaped debris, and we are now developing methods for powdered debris. As a new attempt, we started computational fluid dynamics (CFD) analysis to visually capture the state of powdered debris over time, such as movement and changes in a mixture of powdered debris and water. As this movement or change, we are currently conducting numerical analysis of two-phase systems, focusing on the growth and behavior of H
bubbles in viscoelastic fluids (liquid and gas phases), as well as the structural changes (im-homogenization) over time within the mixture (liquid and solid phases) in relation to H
bubbles (H
pools) that are predicted to be generated during the radiolysis of water and retained in the mixture. In this report, oxides such as ceria and zirconia were used as debris simulants, and we will introduce the results of an analysis of the time-dependent im-homogenization of oxide powder inside water suspensions, as well as future challenges and developments.
Kaburagi, Masaaki; Shiba, Tomooki; Matsumura, Taichi; Sakamoto, Masahiro; Terashima, Kenichi; Sugizaki, Saki*; Okumura, Keisuke
no journal, ,
no abstracts in English
Onuki, Toshihiko*; Utsunomiya, Satoshi*; Nakase, Masahiko*; Takano, Masahide; Dohi, Terumi
no journal, ,
Micro particles containing cesium (Cs) and iodine (I) were synthesized with stainless steel, ZrO and boron by light-concentrating heating technique on a concrete piece in laboratory scale. Elemental composition of the synthesized micro particles and also the effect of water-immersing were analyzed by SEM-EDS. Behaviors of Cs and I were examined from these data.
Matsumura, Taichi; Okumura, Keisuke; Kanno, Ikuo; Riyana, E. S.; Terashima, Kenichi; Sakamoto, Masahiro; Sato, Wakaei*
no journal, ,
no abstracts in English
Gunji, Satoshi; Araki, Shohei; Dechenaux, B.*; Brovchenko, M.*; Aizawa, Eiju; Seki, Masakazu; Arakaki, Yu; Yoshikawa, Tomoki; Izawa, Kazuhiko
no journal, ,
Non-uniformity of the composition is an issue when evaluating fuel debris's criticality characteristics. Critical experiments using the modified STACY are planned to validate the criticality effects of the non-uniformity. In this presentation, the results of the critical experiment their experimental core arrangements have large non-uniformity effects, and their experimental analyses are shown.
Nishimura, Akihiko; Ide, Tsugio*; Ishihara, Nobuyuki*; Urata, Kenyu*
no journal, ,
no abstracts in English
Terashima, Kenichi; Matsumura, Taichi; Sakamoto, Masahiro; Kaburagi, Masaaki; Shiba, Tomooki; Sugizaki, Saki*; Okumura, Keisuke
no journal, ,
no abstracts in English
Shimada, Asako; Iida, Yoshihisa
no journal, ,
no abstracts in English