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Yahagi, Ryoji*; Ishizuka, Hikaru*; Toguri, Satohito*; Matsui, Hiroya
no journal, ,
This repot summarize about the selection of the material and machines for in-situ experiment for the backfilling in a small scale drift by spray method funded by METI.
Iso, Sachie*; Motoshima, Takayuki*; Shirase, Mitsuyasu*; Kobayashi, Masato*; Nakayama, Masashi
no journal, ,
In the high-level radioactive waste disposal project, backfilling the disposal tunnel using soil-bentonite mixtures has been developed. Authors have developed the shotclay method and machinery through elemental test on ground test site, and conducted in-situ verification test on Horonobe URL, underground test site deeper than 300m. In this paper, authors confirmed the workability and the quality of shotclay method in the underground conditions.
Motoshima, Takayuki*; Jo, Mayumi*; Iso, Sachie*; Shirase, Mitsuyasu*; Kobayashi, Masato*; Nakayama, Masashi
no journal, ,
Radioactive waste needs to be managed responsibly even after the waste is transported to the final disposal site. Reversibility and retrievability are also required in high level radioactive waste disposal project. From the viewpoint of the technical feasibility of the retrievability, the development of a technology for removing the bentonite backfilling material surrounding the PEM without damaging the PEM is expected. In this paper, we selected the liquid removal technology using the water jet method and verified the feasibility of selected technology in Horonobe URL, depth of 350 meters.
Jo, Mayumi*; Motoshima, Takayuki*; Iso, Sachie*; Shirase, Mitsuyasu*; Kobayashi, Masato*; Nakayama, Masashi
no journal, ,
Radioactive waste needs to be managed responsibly even after the waste is transported to the final disposal site. Reversibility and retrievability are also required in high level radioactive waste disposal project. From the viewpoint of the technical feasibility of the retrievability, the development of a technology for removing the bentonite backfilling material surrounding the PEM without damaging the PEM is expected. In this paper, we selected the mechanical removal technology using the auger method and verified the feasibility of selected technology in Horonobe URL, depth of 350 meters.
Kawakubo, Shohei*; Chijimatsu, Masakazu*; Matsui, Hiroya; Ozaki, Yusuke
no journal, ,
no abstracts in English
Ueda, Akihiro*; Kawakubo, Shohei*; Chijimatsu, Masakazu*; Matsui, Hiroya; Ozaki, Yusuke
no journal, ,
no abstracts in English