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Takahashi, Nobuo; Kubota, Shintaro; Takiya, Hiroaki; Sakaba, Ryosuke*; Sato, Koichi; Shichi, Ryo
JAEA-Testing 2021-002, 106 Pages, 2022/01
JAEA-Testing-2021-002.pdf:2.08MB
The Japan Atomic Energy Agency has various nuclear facilities such as reactor facilities and reprocessing facilities. Some aged facilities will be decommissioned after their original functions ended, and it is necessary to evaluate their decommissioning cost to formulate the initial decommissioning plans and the final decommissioning plans. We have developed an evaluation method called DECOST that can efficiently calculate the decommissioning cost in a short time based on factors such as features and similarity of the facilities and dismantling methods. The decommissioning of nuclear facilities has been implemented and new achievements and findings have been reported since the development of DECOST. These findings were reflected in DECOST. In consideration of the needs of DECOST users, DECOST has been improved so that the cost of dismantling the facility can be divided into the cost of releasing the controlled area and the cost of dismantling the facility building after the release of the controlled area. This report shows the improvement of DECOST, the concept of resetting the evaluation coefficient used in the cost evaluation formula, and the validity of the evaluation coefficient after resetting. In addition, the evaluation procedure of the improved DECOST is described, since the evaluation items and evaluation contents were partially changed due to the improvement.
Kuroda, Yasuji; Shichi, Ryo; Iwabuchi, Hiroki
no journal, ,
In the Tokai reprocess facilities machine processing line, the shearing characteristic examination that used advanced converter "FUGEN" MOX type B used fuel was executed. In this report, it reports on properties of the shearing energy evaluated by this examination and the fragment and the shearing powder not done.
Suda, Shizuka; Shichi, Ryo; Iwabuchi, Hiroki
no journal, ,
no abstracts in English
Kuroda, Yasuji; Shichi, Ryo; Iwabuchi, Hiroki
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The structural fuel judged to be able to shear by the shearing force presumption technique without the shearing experience so far was actually shorn in the TRP, and the verification of the shearing force presumption technique was verified.
Horie, Koji; Kawakami, Akihiro; Ito, Shinichi; Sato, Shinji; Shimizu, Takenori; Shichi, Ryo
no journal, ,
no abstracts in English
Sato, Shinji; Kawakami, Akihiro; Ito, Shinichi; Takada, Shozo; Horie, Koji; Shimizu, Takenori; Shichi, Ryo
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no abstracts in English
Nanko, Masayuki; Ito, Shinichi; Shichi, Ryo; Iwabuchi, Hiroki
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Four cranes are installed in a cell in the shear processing process of the TRP. I experience various kinds of malfunction at first and, in the crane in these cells, report setting about step of the improvement that I performed to overcome them.
Nanko, Masayuki; Kawakami, Akihiro; Ito, Shinichi; Shichi, Ryo; Iwabuchi, Hiroki
no journal, ,
no abstracts in English
Takeyasu, Shinji; Shichi, Ryo; Iwabuchi, Hiroki
no journal, ,
no abstracts in English
Suda, Shizuka; Tanaka, Makoto; Kuno, Takehiko; Shichi, Ryo; Iwabuchi, Hiroki
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no abstracts in English
Ito, Shinichi; Shichi, Ryo; Takae, Akiyoshi; Iwabuchi, Hiroki
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no abstracts in English
Kawakami, Akihiro; Suda, Shizuka; Shichi, Ryo; Iwabuchi, Hiroki
no journal, ,
The investigation concerning the radiation deterioration of the panel made of plastic set up for the expansion prevention of pollution (Part 2) was done in the maintenance area in the Tokai reprocessing plant shearing processing facilities.
Kuroda, Yasuji; Takeyasu, Shinji; Kawakami, Akihiro; Shichi, Ryo; Shimizu, Takenori
no journal, ,
The remote apparatus of the Tokai reprocessing facility head end process has aimed at improvement in safety and reliability, performing reprocessing operation. This report reports improvement of a fuel introduction conveyor which transports used fuel to the cell which is not carried out from a pool.